The expected bandwidth is an informational parameter used only by higher-layer protocols for calculation. You cannot adjust the actual bandwidth of an interface by using this command.

Examples

# Set the expected bandwidth of GigabitEthernet 1/0/12 to 1000 kbps.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] bandwidth 1000

# Set the expected bandwidth of GigabitEthernet 1/0/12.1 to 1000 kbps.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12.1

[Sysname-GigabitEthernet1/0/12.1] bandwidth 1000

Related commands

speed

dampening

Use dampening to enable the device to dampen an interface when the interface is flapping.

Use undo dampening to restore the default.

Syntax

dampening [ half-life reuse suppress max-suppress-time ]

undo dampening

Default

Interface dampening is disabled on Ethernet interfaces.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

half-life: Specifies the amount of time after which a penalty is decreased, in the range of 1 to 120 seconds. The default value is 54 seconds.

reuse: Specifies the reuse threshold in the range of 200 to 20000. The default value is 750. The reuse threshold must be less than the suppression threshold.

suppress: Specifies the suppression threshold in the range of 200 to 20000. The default value is 2000.

max-suppress-time: Specifies the maximum amount of time the interface can be dampened, in the range of 1 to 255 seconds. The default value is 162 seconds (three times the half-life timer).

Usage guidelines

This command does not take effect on the administratively down events. When you execute the shutdown command, the penalty restores to 0, and the interface reports the down event to the higher layer protocols.

After an interface in down state is dampened, the interface state displayed through the display interface command, MIB, or Web is always down.

Examples

# Enable interface dampening on GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] dampening

# Enable interface dampening on GigabitEthernet 1/0/12, and set the following parameters:

· Half life time to 2 seconds.

· Reuse value to 800.

· Suppression threshold to 3000.

· Maximum suppression interval to 5 seconds.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] dampening 2 800 3000 5

Related commands

display interface

default

Use default to restore the default settings for an interface.

Syntax

default

Views

Ethernet interface view

Ethernet subinterface view

Predefined user roles

network-admin

Usage guidelines

CAUTION:

The default command might interrupt ongoing network services. Make sure you are fully aware of the impacts of this command when you use it in a live network.

This command might fail to restore the default settings for some commands because of command dependencies or system restrictions. You can use the display this command in interface view to identify these commands, and use their undo forms or follow the command reference to restore their default settings. If your restoration attempt still fails, follow the error message instructions to solve the problem.

Examples

# Restore the default settings for GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] default

# Restore the default settings for GigabitEthernet 1/0/12.1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12.1

[Sysname-GigabitEthernet1/0/12.1] default

description

Use description to configure the description of an interface.

Use undo description to restore the default.

Syntax

description text

undo description

Default

The description of an interface is the interface name plus Interface (for example, GigabitEthernet1/0/12 Interface).

Views

Ethernet interface view

Ethernet subinterface view

Predefined user roles

network-admin

Parameters

text: Specifies the interface description, a case-sensitive string of 1 to 255 characters.

Examples

# Set the description of GigabitEthernet 1/0/12 to lan-interface.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] description lan-interface

# Set the description of GigabitEthernet 1/0/12.1 to subinterface1/0/1.1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12.1

[Sysname-GigabitEthernet1/0/12.1] description subinterface1/0/1.1

display counters

Use display counters to display interface traffic statistics.

Syntax

display counters { inbound | outbound } interface [ interface-type [ interface-number ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

inbound: Displays inbound traffic statistics.

outbound: Displays outbound traffic statistics.

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

Usage guidelines

To clear the Ethernet interface traffic statistics, use the reset counters interface command.

If you do not specify an interface type, this command displays traffic statistics for all interfaces that have traffic counters.

If you specify an interface type but do not specify an interface number, this command displays traffic statistics for all interfaces of the specified type.

If you specify an interface type and an interface, this command displays traffic statistics for the specified interface.

Examples

# Display inbound traffic statistics for all GigabitEthernet interfaces.

<Sysname> display counters inbound interface gigabitethernet

Interface Total(pkt) Broadcast(pkt) Multicast(pkt) Err(pkt)

GE1/0/12 100 100 0 0

GE1/0/13 Overflow Overflow Overflow Overflow

Overflow: More than 14 digits (7 digits for column "Err").

--: Not supported.

Table 1 Command output

Field	Description
Interface	Abbreviated interface name.
Total(pkt)	Total number of packets received or sent through the interface.
Broadcast(pkt)	Total number of broadcast packets received or sent through the interface.
Multicast(pkt)	Total number of multicast packets received or sent through the interface.
Err(pkt)	Total number of error packets received or sent through the interface.
Overflow: More than 14 digits (7 digits for column "Err")	The command displays Overflow when any of the following conditions exist: · The data length of an Err field value is greater than 7 decimal digits. · The data length of a non-Err field value is greater than 14 decimal digits.
--: Not supported	The statistical item is not supported.

Related commands

reset counters interface

display counters rate

Use display counters rate to display traffic rate statistics for interfaces in up state within the most recent statistics polling interval.

Syntax

display counters rate [ inbound | outbound ] interface [ interface-type [ interface-number ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

inbound: Displays inbound traffic rate statistics.

outbound: Displays outbound traffic rate statistics.

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

Usage guidelines

If you do not specify the inbound or outbound keyword, this command displays both the inbound and outbound traffic rate statistics for interfaces in up state within the most recent statistics polling interval.

If you do not specify an interface type, this command displays traffic rate statistics for all up interfaces that have traffic counters.

If you specify an interface type but do not specify an interface number or subinterface number, this command displays traffic rate statistics for all up interfaces of the specified type.

If you specify an interface type and an interface or subinterface number, this command displays traffic rate statistics for the specified interface or subinterface.

If an interface that you specify is always down for the most recent statistics polling interval, the system prompts that the interface does not support the command.

You can use the flow-interval command to set the statistics polling interval.

Examples

# Display the inbound and outbound traffic rate statistics for GigabitEthernet 1/0/12.

<Sysname> display counters rate interface gigabitethernet 1/0/12

Usage: Bandwidth utilization in percentage

Interface InUsage(%) InTotal(pps) OutUsage(%) OutTotal(pps)

GE1/0/12 0 0 0 0

Overflow: More than 14 digits.

--: Not supported.

# Display the inbound traffic rate statistics for all GigabitEthernet interfaces.

<Sysname> display counters rate inbound interface gigabitethernet

Usage: Bandwidth utilization in percentage

Interface Usage(%) Total(pps) Broadcast(pps) Multicast(pps)

GE1/0/12 3 200 100 100

Overflow: More than 14 digits.

--: Not supported.

Table 2 Command output

Field	Description
Interface	Abbreviated interface name.
Usage(%)	Bandwidth usage (in percentage) of the interface within the most recent statistics polling interval.
Total(pps)	Average receiving or sending rate (in pps) for all packets within the most recent statistics polling interval.
InUsage(%)	Bandwidth usage (in percentage) of all inbound packets within the most recent statistics polling interval. When the usage is smaller than 1%, 1% is displayed.
InTotal(pps)	Average receiving rate (in pps) for all packets within the most recent statistics polling interval.
OutUsage(%)	Bandwidth usage (in percentage) of all outbound packets within the most recent statistics polling interval. When the usage is smaller than 1%, 1% is displayed.
OutTotal(pps)	Average sending rate (in pps) for all packets within the most recent statistics polling interval.
Broadcast(pps)	Average receiving or sending rate (in pps) for broadcast packets within the most recent statistics polling interval.
Multicast(pps)	Average receiving or sending rate (in pps) for multicast packets within the most recent statistics polling interval.
Overflow: more than 14 decimal digits	The command displays Overflow if the data length of a statistical item is greater than 14 decimal digits.
--: not supported	The statistical item is not supported.

Related commands

flow-interval

reset counters interface

display ethernet statistics

Use display ethernet statistics to display the Ethernet module statistics.

Syntax

display ethernet statistics slot slot-number

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

slot slot-number: Specifies an IRF member device by its member ID.

Examples

# Display the Ethernet module statistics for the specified slot.

<Sysname> display ethernet statistics slot 1

ETH receive packet statistics:

Totalnum : 10447 ETHIINum : 4459

SNAPNum : 0 RAWNum : 0

LLCNum : 0 UnknownNum : 0

ForwardNum : 4459 ARP : 0

MPLS : 0 ISIS : 0

ISIS2 : 0 IP : 0

IPV6 : 0

ETH receive error statistics:

NullPoint : 0 ErrIfindex : 0

ErrIfcb : 0 IfShut : 0

ErrAnalyse : 5988 ErrSrcMAC : 5988

ErrHdrLen : 0

ETH send packet statistics:

L3OutNum : 211 VLANOutNum : 0

FastOutNum : 155 L2OutNum : 0

ETH send error statistics:

MbufRelayNum : 0 NullMbuf : 0

ErrAdjFwd : 0 ErrPrepend : 0

ErrHdrLen : 0 ErrPad : 0

ErrQoSTrs : 0 ErrVLANTrs : 0

ErrEncap : 0 ErrTagVLAN : 0

IfShut : 0 IfErr : 0

Table 3 Output description

Field	Description
ETH receive packet statistics	Statistics about the Ethernet packets received by the Ethernet module: · Totalnum—Total number of received packets. · ETHIINum—Number of packets encapsulated by using Ethernet II. · SNAPNum—Number of packets encapsulated by using SNAP. · RAWNum—Number of packets encapsulated by using RAW. · LLCNum—Number of packets encapsulated by using LLC. · UnknownNum—Number of packets encapsulated by using unknown methods. · ForwardNum—Number of packets forwarded at Layer 2 or sent to the CPU.This field is not supported in the current software version.‌‌ · ARP—Number of ARP packets. · MPLS—Number of MPLS packets. · ISIS—Number of IS-IS packets. · ISIS2—Number of large 802.3/802.2 frames encapsulated by using IS-IS. · IP—Number of IP packets. · IPv6—Number of IPv6 packets.‌
ETH receive error statistics	Statistics about the error Ethernet packets in the inbound direction on the Ethernet module. Errors might be included in packets or occur during the receiving process. The items include: · NullPoint—Number of packets that include null pointers. · ErrIfindex—Number of packets that include incorrect interface indexes. · ErrIfcb—Number of packets that include incorrect interface control blocks. · IfShut—Number of packets that are being received when the interface is shut down. · ErrAnalyse—Number of packets that include packet parsing errors. · ErrSrcMAC—Number of packets that include incorrect source MAC addresses. · ErrHdrLen—Number of packets that include header length errors.
ETH send packet statistics	Statistics about the Ethernet packets sent by the Ethernet module: · L3OutNum—Number of packets sent out of Layer 3 Ethernet interfaces. · VLANOutNum—Number of packets sent out of VLAN interfaces.This field is not supported in the current software version.‌‌ · FastOutNum—Number of packets fast forwarded. · L2OutNum—Number of packets sent out of Layer 2 Ethernet interfaces.This field is not supported in the current software version.‌‌ · MbufRelayNum—Number of packets transparently sent.
ETH send error statistics	Statistics about the error Ethernet packets in the outbound direction on the Ethernet module: · NullMbuf—Number of packets with null pointers. · ErrAdjFwd—Number of packets with adjacency table errors.This field is not supported in the current software version. ‌‌‌ · ErrPrepend—Number of packets with extension errors. · ErrHdrLen—Number of packets with header length errors. · ErrPad—Number of packets with padding errors. · ErrQoSTrs—Number of packets that failed to be sent by QoS. · ErrVLANTrs—Number of packets that failed to be sent in VLANs. ‌ · ErrEncap—Number of packets that failed to be sent due to link header encapsulation failures. · ErrTagVLAN—Number of packets that failed to be sent due to VLAN tag encapsulation failures. ‌ · IfShut—Number of packets that are being sent when the interface is shut down. · IfErr—Number of packets with incorrect outgoing interfaces.

‌

Related commands

reset ethernet statistics

display interface

Use display interface to display interface information.

Syntax

display interface [ interface-type [ interface-number | interface-number.subnumber ] ] [ brief [ description | down ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

interface-number.subnumber: Specifies a subinterface number. The interface-number argument is an interface number. The subnumber argument is the number of a subinterface created under the interface. The value range for the subnumber argument is 1 to 4094.

brief: Displays brief interface information. If you do not specify this keyword, the command displays detailed interface information.

description: Displays complete interface descriptions. If you do not specify this keyword, the command displays only the first 27 characters of each interface description.

down: Displays information about interfaces in down state and the causes. If you do not specify this keyword, the command displays information about interfaces in all states.

Usage guidelines

If you do not specify an interface type, this command displays information about all interfaces.

If you specify an interface type but do not specify an interface number or subinterface number, this command displays information about all interfaces of the specified type.

Examples

# Display information about Layer 3 interface GigabitEthernet 1/0/12.

<Sysname> display interface gigabitethernet 1/0/12

GigabitEthernet1/0/12

Current state: Administratively DOWN

Line protocol state: DOWN

Description: GigabitEthernet1/0/12 Interface

Bandwidth: 1000000 kbps

Flow-control is not enabled

Maximum transmission unit: 1500

Allow jumbo frames to pass

Broadcast max-ratio: 100%

Multicast max-ratio: 100%

Unicast max-ratio: 100%

Internet address: 11.1.1.1/24 (Primary)

IP packet frame type: Ethernet II, hardware address: 3822-d666-bd0c

IPv6 packet frame type: Ethernet II, hardware address: 3822-d666-bd0c

Media type is twisted pair

port hardware type is 1000_BASE_T

Port priority: 2

Unknown-speed mode, unknown-duplex mode

Link speed type is autonegotiation, link duplex type is autonegotiation

The maximum frame length is 12288

Last link flapping: 6 hours 39 minutes 28 seconds

Last clearing of counters: Never

Current system time:2017-10-27 15:10:03

Last time when physical state changed to up:-

Last time when physical state changed to down:2017-10-27 14:56:38

Peak input rate: 62 bytes/sec, at 2019-08-16 11:23:37

Peak output rate: 58 bytes/sec, at 2019-08-16 11:23:48

Last 300 second input: 0 packets/sec 0 bytes/sec 0%

Last 300 second output: 0 packets/sec 0 bytes/sec 0%

Input (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, - pauses

Input (normal): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input: 0 input errors, 0 runts, 0 giants, 0 throttles

0 CRC, 0 frame, 0 overruns, - aborts

- ignored, - parity errors

Output (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, - pauses

Output (normal): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output: 0 output errors, - underruns, - buffer failures

0 aborts, 0 deferred, 0 collisions, 0 late collisions

- lost carrier, - no carrier

Table 4 Command output

Field	Description
Current state	Physical link state of the interface: · Administratively DOWN—The interface has been shut down by using the shutdown command. · DOWN—The interface is administratively up, but its physical state is down (possibly because no physical link exists or the link has failed). · DOWN ( Link-Aggregation interface down )—The aggregate interface to which the interface belongs has been shut down by using the shutdown command. · DOWN ( Tunnel-Bundle administratively down )—The tunnel bundle interface to which the interface belongs has been shut down by using the shutdown command. · mac-address moving down—The interface has been shut down by the MAC address move suppression feature. · UP—The interface is both administratively and physically up.
Line protocol state	Data link layer state of the interface. The state is determined through automatic parameter negotiation at the data link layer. · UP—The data link layer protocol is up. · UP (spoofing)—The data link layer protocol is up, but the link is an on-demand link or does not exist. This attribute is typical of null interfaces and loopback interfaces. · DOWN—The data link layer protocol is down. · DOWN (protocols)—The data link layer has been shut down by protocols included in the parentheses. Available protocols include: ¡ LAGG—Shuts down the data link layer when it detects that the aggregate interface does not have Selected ports. ¡ BFD—Shuts down the data link layer when it detects a link failure.
Bandwidth	Expected bandwidth of the interface.
Maximum transmission unit	MTU of the interface.
Internet protocol processing	IP configuration parameter of the interface when the interface is not assigned an IP address: · Disabled—The interface cannot process IP packets. · Enabled—The interface can process IP packets.
Internet address: ip-address/mask-length (Type)	IP address of the interface and type of the address in parentheses. Possible IP address types include: · Primary—Manually configured primary IP address. · Sub—Manually configured secondary IP address. If the interface has both primary and secondary IP addresses, the primary IP address is displayed. If the interface has only secondary IP addresses, the lowest secondary IP address is displayed. · DHCP-allocated—DHCP allocated IP address. For more information, see DHCP client configuration in Layer 3—IP Services Configuration Guide. · BOOTP-allocated—BOOTP allocated IP address. For more information, see BOOTP client configuration in Layer 3—IP Services Configuration Guide. · Unnumbered—IP address borrowed from another interface.
IP packet frame type	IPv4 packet framing format.
hardware address	MAC address of the interface.
IPv6 packet frame type	IPv6 packet framing format.
FEC mode	FEC mode of the interface, which depends on the configuration. When the FEC mode of an interface is set to autonegotiation, the actual FEC mode depends on the model of the transceiver module installed in the fiber port.
Port priority	Port priority of the interface.
Loopback is set internal	An internal loopback test is running on the interface. This field depends on your configuration .
Loopback is set external	An external loopback test is running on the interface. This field depends on your configuration.
Loopback is not set	No loopback test is running on the interface. This field depends on your configuration.
10Mbps-speed mode	The interface is operating at 10 Mbps. This field depends on your configuration and the link parameter negotiation result.
100Mbps-speed mode	The interface is operating at 100 Mbps. This field depends on your configuration and the link parameter negotiation result.
1000Mbps-speed mode	The interface is operating at 1000 Mbps. This field depends on your configuration and the link parameter negotiation result.
10Gbps-speed mode	The interface is operating at 10 Gbps. This field depends on your configuration and the link parameter negotiation result.
40Gbps-speed mode	The interface is operating at 40 Gbps. This field depends on your configuration and the link parameter negotiation result.
50Gbps-speed mode	The interface is operating at 50 Gbps. This field depends on your configuration and the link parameter negotiation result.
100Gbps-speed mode	The interface is operating at 100 Gbps. This field depends on your configuration and the link parameter negotiation result.
Unknown-speed mode	The speed of the interface is unknown because the speed negotiation fails or the interface is physically disconnected.
full-duplex mode	The interface is operating in full duplex mode. This field depends on your configuration and the link parameter negotiation result.
unknown-duplex mode	The duplex mode of the interface is unknown because the duplex mode negotiation fails or the interface is physically disconnected.
Link speed type is autonegotiation	The interface is configured with the speed auto command.
Link speed type is force link	The interface is manually configured with a speed (for example, 10 Mbps or 100 Mbps) by using the speed command.
link duplex type is autonegotiation	The interface is configured with the duplex auto command.
link duplex type is force link	The interface is manually configured with a duplex mode (for example, full) by using the duplex command.
Flow-control is not enabled	Generic flow control is disabled on the interface. This field depends on your configuration and the link parameter negotiation result.
Maximum frame length	Maximum length of Ethernet frames allowed to pass through the interface.
Allow jumbo frame to pass	The interface allows jumbo frames to pass through.
Broadcast max-	This field is not supported in the current software version.‌Broadcast storm suppression threshold in ratio, pps, or kbps. The unit of the threshold depends on your configuration.
Multicast max-	This field is not supported in the current software version.‌Multicast storm suppression threshold in ratio, pps, or kbps. The unit of the threshold depends on your configuration.
Unicast max-	This field is not supported in the current software version. ‌Unknown unicast storm suppression threshold in ratio, pps, or kbps. The unit of the threshold depends on your configuration.
PVID	Port VLAN ID (PVID) of the interface.
MDI type	MDIX mode of the interface: · automdix. · mdi. · mdix.
Port link-type	Link type of the interface: · access. · trunk. · hybrid.
Tagged VLANs	VLANs for which the interface sends packets without removing VLAN tags.
Untagged VLANs	VLANs for which the interface sends packets after removing VLAN tags.
VLAN Passing	VLANs whose packets can be forwarded by the port. The VLANs must have been created.
VLAN permitted	VLANs whose packets are permitted by the port.
Trunk port encapsulation	Encapsulation protocol type for the trunk port.
Last link flapping	The amount of time that has elapsed since the most recent physical state change of the interface. This field displays Never if the interface has been physically down since device startup.
Last clearing of counters	Time when the reset counters interface command was last used to clear the interface statistics. This field displays Never if the reset counters interface command has never been used on the interface since device startup.
Current system time	Current system time in the YYYY/MM/DD HH:MM:SS format. If the time zone is configured, this field is in the YYYY/MM/DD HH:MM:SS UTC±HH:MM:SS format.
Last time when physical state changed to up	Last time when physical state of the interface changed to up. A hyphen (-) indicates that the physical state of the interface has not changed to up.
Last time when physical state changed to down	Last time when physical state of the interface changed to down. A hyphen (-) indicates that the physical state of the interface has not changed to down.
Last 300 seconds input: 0 packets/sec 0 bytes/sec 0 bits/sec 0.00% Last 300 seconds output: 0 packets/sec 0 bytes/sec 0 bits/sec 0.00%	Average inbound or outbound traffic rate (in pps, Bps, and bps) in the last statistics polling interval, and the ratio of the actual rate to the interface bandwidth. To set the statistics polling interval, execute the flow-interval command. A hyphen (-) indicates that the statistical item is not supported.
Input(total): 0 packets, 0 bytes 0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses	The two fields on the first line represent the inbound traffic statistics (in packets and bytes) for the interface. All inbound normal packets, abnormal packets, and normal pause frames were counted. The four fields on the second line represent: · Number of inbound unicast packets. · Number of inbound broadcasts. · Number of inbound multicasts. · Number of inbound pause frames. A hyphen (-) indicates that the statistical item is not supported.
Input(normal): 0 packets, 0 bytes 0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses	The two fields on the first line represent the inbound normal traffic and pause frame statistics (in packets and bytes) for the interface. The four fields on the second line represent: · Number of inbound normal unicast packets. · Number of inbound normal broadcasts. · Number of inbound normal multicasts. · Number of inbound normal pause frames. A hyphen (-) indicates that the statistical item is not supported.
input errors	Statistics of incoming error packets.
runts	Number of inbound frames meeting the following conditions: · Shorter than 64 bytes. · In correct format. · Containing valid CRCs.
giants	Number of inbound giants. Giants refer to frames larger than the maximum frame length supported on the interface. For an Ethernet interface that does not permit jumbo frames, the maximum frame length is as follows: · 1518 bytes (without VLAN tags). · 1522 bytes (with VLAN tags). For an Ethernet interface that permits jumbo frames, the maximum Ethernet frame length is set when you configure jumbo frame support on the interface.
throttles	Number of inbound frames that had a non-integer number of bytes.
CRC	Total number of inbound frames that had a normal length, but contained CRC errors.
frame	Total number of inbound frames that contained CRC errors and a non-integer number of bytes.
overruns	Number of packets dropped because the input rate of the port exceeded the queuing capability.
aborts	Total number of illegal inbound packets: · Fragment frames—CRC error frames shorter than 64 bytes. The length (in bytes) can be an integral or non-integral value. · Jabber frames—CRC error frames greater than the maximum frame length supported on the Ethernet interface (with an integral or non-integral length). ¡ For an Ethernet interface that does not permit jumbo frames, the maximum frame length is 1518 bytes (without VLAN tags) or 1522 bytes (with VLAN tags). ¡ For an Ethernet interface that permits jumbo frames, the maximum Ethernet frame length is set when you configure jumbo frame support on the interface. · Symbol error frames—Frames that contained a minimum of one undefined symbol. · Unknown operation code frames—Non-pause MAC control frames. · Length error frames—Frames whose 802.3 length fields did not match the actual frame length (46 to 1500 bytes).
ignored	Number of inbound frames dropped because the receiving buffer of the port ran low.
parity errors	Total number of frames with parity errors.
Output(total): 0 packets, 0 bytes 0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses	The two fields on the first line represent the outbound traffic statistics (in packets and bytes) for the interface. All outbound normal packets, abnormal packets, and normal pause frames were counted. The four fields on the second line represent: · Number of outbound unicast packets. · Number of outbound broadcasts. · Number of outbound multicasts. · Number of outbound pause frames. A hyphen (-) indicates that the statistical item is not supported.
Output(normal): 0 packets, 0 bytes 0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses	The two fields on the first line represent the outbound normal traffic and pause frame statistics (in packets and bytes) for the interface. The four fields on the second line represent: · Number of outbound normal unicast packets. · Number of outbound normal broadcasts. · Number of outbound normal multicasts. · Number of outbound normal pause frames. A hyphen (-) indicates that the statistical item is not supported.
output errors	Number of outbound packets with errors.
underruns	Number of packets dropped because the output rate of the interface exceeded the output queuing capability. This is a low-probability hardware anomaly.
buffer failures	Number of packets dropped because the transmitting buffer of the interface ran low.
aborts	Number of packets that failed to be transmitted, for example, because of Ethernet collisions.
deferred	Number of frames that the interface deferred to transmit because of detected collisions.
collisions	Number of frames that the interface stopped transmitting because Ethernet collisions were detected during transmission.
late collisions	‌Number of frames that the interface deferred to transmit after transmitting their first 512 bits because of detected collisions.
lost carrier	This field is not supported in the current software version.Number of carrier losses during transmission. This counter increases by one when a carrier is lost, and applies to serial WAN interfaces.
no carrier	This field is not supported in the current software version. Number of times that the port failed to detect the carrier when attempting to send frames. This counter increases by one when a port failed to detect the carrier, and applies to serial WAN interfaces.
Peak input rate	Peak rate of inbound traffic in Bps, and the time when the peak inbound traffic rate occurred.
Peak output rate	Peak rate of outbound traffic in Bps, and the time when the peak outbound traffic rate occurred.

# Display brief information about all interfaces.

<Sysname> display interface brief

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Protocol: (s) – spoofing

Interface Link Protocol Primary IP Description

GE1/0/12 DOWN DOWN --

Loop0 UP UP(s) 2.2.2.9

NULL0 UP UP(s) --

Vlan1 UP DOWN --

Vlan999 UP UP 192.168.1.42

# Display information about interfaces in DOWN state and the causes.

<Sysname> display interface brief down

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Interface Link Cause

GE1/0/12 DOWN Not connected

Table 5 Command output

Field	Description
Interface	Interface name.
Link	Physical link state of the interface: · UP—The interface is physically up. · DOWN—The interface is physically down. · ADM—The interface has been shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. · Stby—The interface is a backup interface in standby state. To see the primary interface, use the display interface-backup state command.
Protocol	Data link layer protocol state of the interface: · UP—The data link layer protocol of the interface is up. · DOWN—The data link layer protocol of the interface is down. · UP(s)—The data link layer protocol of the interface is up, but the link is an on-demand link or does not exist. The (s) attribute represents the spoofing flag. This value is typical of null interfaces and loopback interfaces.
Primary IP	Primary IP address of the interface. This field displays two hyphens (--) if the interface does not have an IP address.
Description	Description of the interface.
Brief information of interfaces in bridge mode:	Brief information about Layer 2 interfaces.
Type: A - access; T - trunk; H – hybrid	Link type options for interfaces.
Speed	Speed of the interface, in bps. This field displays the (a) flag next to the speed if the speed is automatically negotiated. This field displays auto if the interface is configured to autonegotiate its speed but the autonegotiation has not started.
Duplex	Duplex mode of the interface: · A—Autonegotiation. The interface is configured to autonegotiate its duplex mode but the autonegotiation has not started. · F—Full duplex. · F(a)—Autonegotiated full duplex. · H—Half duplex. This field is not supported in the current software version.‌ · H(a)—Autonegotiated half duplex. This field is not supported in the current software version.‌
Type	Link type of the interface: · A—Access. · H—Hybrid. · T—Trunk.
PVID	Port VLAN ID.
Cause	Cause for the physical link state of an interface to be DOWN: · Administratively—The interface has been manually shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. · DOWN ( Link-Aggregation interface down )—The interface is a member port of an aggregate interface, and the aggregate interface is down. · Not connected—No physical connection exists (possibly because the network cable is disconnected or faulty). · Standby—The interface is a backup interface in standby state.

‌

Related commands

reset counters interface

display interface link-info

Use display interface link-info to display the status and packet statistics of interfaces.

Syntax

display interface link-info [ main ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

main: Specifies all interfaces except subinterfaces. If you do not specify this keyword, this command displays status and packet statistics of all interfaces.

Examples

# Display status and statistics of all interfaces.

<Sysname> display interface link-info

Link: ADM - administratively down; Stby - standby

Protocol: (s) - spoofing

Interface Link Protocol InUsage OutUsage InErrs OutErrs

GE1/0/12 UP UP 10.09% 0% 0 0

NULL0 UP UP(s) 0% 0% 0 0

Overflow: More than 7 digits.

--: Not supported.

Table 6 Command output

Field	Description
Link: ADM - administratively down; Stby - standby	Physical link state of the interface: · ADM—The interface has been shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. · Stby—The interface is a backup interface in standby state. To see the primary interface, use the display interface-backup state command.
Protocol: (s) – spoofing	The data link layer protocol of the interface is up, but the link is an on-demand link or does not exist. The (s) attribute represents the spoofing flag. This value is typical of null interfaces, loopback interfaces, and InLoopback interfaces.
Interface	Abbreviated interface name.
Link	Physical link state of the interface: · UP—The interface is physically up. · DOWN—The interface is physically down. · ADM—The interface has been shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. · Stby—The interface is a backup interface in standby state.
Protocol	Data link layer protocol state of the interface: · UP—The data link layer protocol of the interface is up. · DOWN—The data link layer protocol of the interface is down. · UP(s)—The data link layer protocol of the interface is up, but the link is an on-demand link or does not exist. The (s) attribute represents the spoofing flag. This value is typical of null interfaces, loopback interfaces, and InLoopback interfaces.
InUsage	Inbound bandwidth usage within the most recent statistics polling interval. It is calculated by this formula: Average inbound speed of the interface within the most recent statistics polling interval/interface bandwidth. When the usage is smaller than 0.01%, 0.01% is displayed. To set the statistics polling interval, use the flow-interval command.
OutUsage	Outbound bandwidth usage within the most recent statistics polling interval. It is calculated by this formula: Average outbound speed of the interface within the most recent statistics polling interval/interface bandwidth. When the usage is smaller than 0.01%, 0.01% is displayed. To set the statistics polling interval, use the flow-interval command.
InErrs	Number of error packets received.
OutErrs	Number of error packets sent.
Overflow: More than 7 digits.	The data length of a statistical item value is greater than 7 decimal digits.
--: Not supported.	A hyphen (-) indicates that the corresponding statistical item is not supported.

Related commands

flow-interval

display interface main

Use display interface main to display operating status and information of all interfaces except subinterfaces.

Syntax

display interface [ interface-type ] [ brief [ description | down ] ] main

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type: Specifies an interface type. If you do not specify this argument, the command displays information about interfaces of all types.

brief: Displays brief interface information. If you do not specify this keyword, the command displays detailed interface information.

description: Displays complete interface descriptions. If you do not specify this keyword, the command displays only the first 27 characters of each interface description.

down: Displays information about interfaces in down state and the causes. If you do not specify this keyword, the command displays information about interfaces in all states.

Examples

# Display operating status and information of all interfaces except subinterfaces.

<Sysname> display interface main

GigabitEthernet1/0/12

Current state: Administratively DOWN

Line protocol state: DOWN

IP packet frame type: Ethernet II, hardware address: 4005-6538-0100

Description: GigabitEthernet1/0/12 Interface

Bandwidth: 1000000 kbps

Loopback is not set

Unknown-speed mode, unknown-duplex mode

Link speed type is autonegotiation, link duplex type is autonegotiation

Flow-control is not enabled

Maximum frame length: 9216

Allow jumbo frames to pass

Broadcast max-ratio: 100%

Multicast max-ratio: 100%

Unicast max-ratio: 100%

PVID: 1

MDI type: Automdix

Port link-type: Access

Tagged VLANs: None

Untagged VLANs: 1

Port priority: 2

Last link flapping: Never

Last clearing of counters: Never

Current system time:2018-04-11 10:20:24

Last time when physical state changed to up:-

Last time when physical state changed to down:2018-04-11 09:11:09

Peak input rate: 0 bytes/sec, at 00-00-00 00:00:00

Peak output rate: 0 bytes/sec, at 00-00-00 00:00:00

Last 300 seconds input: 0 packets/sec 0 bytes/sec 0 bits/sec 0.00%

Last 300 seconds output: 0 packets/sec 0 bytes/sec 0 bits/sec 0.00%

Input (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input (normal): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input: 0 input errors, 0 runts, 0 giants, 0 throttles

0 CRC, 0 frame, 0 overruns, 0 aborts

0 ignored, 0 parity errors

Output (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output (normal): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output: 0 output errors, 0 underruns, 0 buffer failures

0 aborts, 0 deferred, 0 collisions, 0 late collisions

0 lost carrier, 0 no carrier

GigabitEthernet1/0/13

Current state: Administratively DOWN

Line protocol state: DOWN

Description: GigabitEthernet1/0/13 Interface

Bandwidth: 1000000 kbps

Flow-control is not enabled

Maximum transmission unit: 1500

Allow jumbo frames to pass

Broadcast max-ratio: 100%

Multicast max-ratio: 100%

Unicast max-ratio: 100%

Internet protocol processing: Disabled

IP packet frame type: Ethernet II, hardware address: 4005-6538-0107

IPv6 packet frame type: Ethernet II, hardware address: 4005-6538-0107

Output queue - Urgent queuing: Size/Length/Discards 0/100/0

Output queue - Protocol queuing: Size/Length/Discards 0/500/0

Output queue - FIFO queuing: Size/Length/Discards 0/75/0

Last link flapping: Never

Last clearing of counters: Never

Current system time:2018-04-11 10:20:24

Last time when physical state changed to up:-

Last time when physical state changed to down:2018-04-11 09:33:52

Peak input rate: 0 bytes/sec, at 00-00-00 00:00:00

Peak output rate: 0 bytes/sec, at 00-00-00 00:00:00

Last 300 seconds input: 0 packets/sec 0 bytes/sec 0 bits/sec 0.00%

Last 300 seconds output: 0 packets/sec 0 bytes/sec 0 bits/sec 0.00%

Input (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input (normal): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input: 0 input errors, 0 runts, 0 giants, 0 throttles

0 CRC, 0 frame, 0 overruns, 0 aborts

0 ignored, 0 parity errors

Output (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output (normal): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output: 0 output errors, 0 underruns, 0 buffer failures

0 aborts, 0 deferred, 0 collisions, 0 late collisions

0 lost carrier, 0 no carrier

# Display brief information of all interfaces except subinterfaces.

<Sysname> display interface brief main

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Protocol: (s) – spoofing

Interface Link Protocol Primary IP Description

GE1/0/12 DOWN DOWN --

Loop0 UP UP(s) 2.2.2.9

NULL0 UP UP(s) --

Vlan1 UP DOWN --

Vlan999 UP UP 192.168.1.42

# Display information about interfaces in DOWN state and the causes.

<Sysname> display interface brief down main

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Interface Link Cause

GE1/0/12 DOWN Not connected

Vlan2 DOWN Not connected

For description on the display interface main command output, see Table 4 and Table 5.

duplex

Use duplex to set the duplex mode for an Ethernet interface.

Use undo duplex to restore the default.

Syntax

duplex { auto | full }

undo duplex

Default

Ethernet interfaces autonegotiate the duplex mode.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

auto: Configures the interface to autonegotiate the duplex mode with the peer.

full: Configures the interface to operate in full duplex mode. In this mode, the interface can receive and transmit packets simultaneously.

Usage guidelines

Executing both the duplex full and speed 100 commands on a GE copper port will shut down the port.

Examples

# Configure GigabitEthernet 1/0/12 to operate in full duplex mode.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] duplex full

flow-interval

Use flow-interval to set the statistics polling interval.

Use undo flow-interval to restore the default.

Syntax

flow-interval interval

undo flow-interval

Default

The statistics polling interval is 300 seconds.

Views

System view

Predefined user roles

network-admin

Parameters

interval: Sets the statistics polling interval in seconds. In system view, the interval is in the range of 5 to 300 and must be a multiple of 5.

Usage guidelines

As a best practice, use the default value for the flow-interval command in system view. A short static polling interval in system view might decrease the system performance and result in inaccurate statistics.

You can use the display interface command to view the statistics only after two consecutive statistics polling intervals. The statistics are displayed by the Last interval second input and Last interval second input fields in the display interface command output.

Examples

# Set the statistics polling interval to 100 seconds.

<Sysname> system-view

[Sysname] flow-interval 100

Related commands

display interface

ifmonitor crc-error

Use ifmonitor crc-error to configure global CRC error packet alarm parameters.

Use undo ifmonitor crc-error to restore the default.

Syntax

ifmonitor crc-error slot slot-number high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo ifmonitor crc-error slot slot-number

Default

The upper threshold is 1000, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for CRC error packet alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for CRC error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for CRC error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for CRC error packets, in the range of 1 to 65535 seconds.

shutdown: Shuts down an interface when the number of incoming CRC error packets on the interface exceeds the upper threshold. Then, the interface stops forwarding all packets. To recover the interface, execute the undo shutdown command on the interface. If you do not specify this keyword, an upper threshold exceeding alarm is generated and the interface enters the alarm state when the number of incoming CRC error packets exceeds the upper threshold on the interface.

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

With the CRC error packet alarm function enabled, when the number of incoming CRC error packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of incoming CRC error packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the CRC error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface. (Devices that do not support the slot keyword.)

· The configuration in system view takes effect on all interfaces of the specified slot. The configuration in interface view takes effect only on the current interface. (Devices that support the slot keyword.)

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for CRC error packet alarms on slot 1.

<Sysname> system-view

[Sysname] ifmonitor crc-error slot 1 high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

ifmonitor input-error

Use ifmonitor input-error to configure global input error packet alarm parameters.

Use undo ifmonitor input-error to restore the default.

Syntax

ifmonitor input-error slot slot-number high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo ifmonitor input-error slot slot-number

Default

The upper threshold is 1000, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for input error packet alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for input error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for input error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for input error packets, in the range of 1 to 65535 seconds.

shutdown: Shuts down an interface when the number of input error packets on the interface exceeds the upper threshold. Then, the interface stops forwarding all packets. To recover the interface, execute the undo shutdown command on the interface. If you do not specify this keyword, an upper threshold exceeding alarm is generated and the interface enters the alarm state when the number of input error packets exceeds the upper threshold on the interface.

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

With the input error packet alarm function enabled, when the number of input error packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of input error packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the input error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface. (Devices that do not support the slot keyword.)

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for input error packet alarms on slot 1.

<Sysname> system-view

[Sysname] ifmonitor input-error slot 1 high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

ifmonitor input-usage

Use ifmonitor input-usage to configure global input bandwidth usage alarm parameters.

Use undo ifmonitor input-usage to restore the default.

Syntax

ifmonitor input-usage slot slot-number high-threshold high-value low-threshold low-value

undo ifmonitor input-usage slot slot-number

Default

The upper threshold is 90, and the lower threshold is 80.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for input bandwidth usage alarms, in the range of 1 to 100.

low-threshold low-value: Specifies the lower threshold for input bandwidth usage alarms, in the range of 1 to 100.

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

With the input bandwidth usage alarm function enabled, when the input bandwidth usage on an interface in normal state within the most recent statistics polling interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the input bandwidth usage on an interface in the alarm state within the most recent statistics polling interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

The statistics polling interval varies by device model:

· On a device that does not support the flow-interval command, the statistics polling interval is 5 minutes.

· On a device that supports the flow-interval command, you can use the flow-interval command to set the statistics polling interval.

You can configure the input bandwidth usage alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface. (Devices that do not support the slot keyword.)

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the input bandwidth usage alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 95 and lower threshold to 80 for input bandwidth usage alarms on slot 1.

<Sysname> system-view

[Sysname] ifmonitor input-usage slot 1 high-threshold 95 low-threshold 80

Related commands

flow-interval

snmp-agent trap enable ifmonitor

ifmonitor output-error

Use ifmonitor output-error to configure global output error packet alarm parameters.

Use undo ifmonitor output-error to restore the default.

Syntax

ifmonitor output-error slot slot-number high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo ifmonitor output-error slot slot-number

Default

The upper threshold is 1000, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for output error packet alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for output error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for output error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for output error packets, in the range of 1 to 65535 seconds.

shutdown: Shuts down an interface when the number of output error packets on the interface exceeds the upper threshold. Then, the interface stops forwarding all packets. To recover the interface, execute the undo shutdown command on the interface. If you do not specify this keyword, an upper threshold exceeding alarm is generated and the interface enters the alarm state when the number of output error packets exceeds the upper threshold on the interface.

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

With the output error packet alarm function enabled, when the number of output error packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of output error packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the output error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface. (Devices that do not support the slot keyword.)

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for output error packet alarms on slot 1.

<Sysname> system-view

[Sysname] ifmonitor output-error slot 1 high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

ifmonitor output-usage

Use ifmonitor output-usage to configure global output bandwidth usage alarm parameters.

Use undo ifmonitor output-usage to restore the default.

Syntax

ifmonitor output-usage slot slot-number high-threshold high-value low-threshold low-value

undo ifmonitor output-usage slot slot-number

Default

The upper threshold is 90, and the lower threshold is 80.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for output bandwidth usage alarms, in the range of 1 to 100.

low-threshold low-value: Specifies the lower threshold for output bandwidth usage alarms, in the range of 1 to 100.

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

With the output bandwidth usage alarm function enabled, when the output bandwidth usage on an interface in normal state within the most recent statistics polling interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the output bandwidth usage on an interface in the alarm state within the most recent statistics polling interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

The statistics polling interval varies by device model:

· On a device that does not support the flow-interval command, the statistics polling interval is 5 minutes.

· On a device that supports the flow-interval command, you can use the flow-interval command to set the statistics polling interval.

You can configure the output bandwidth usage alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface. (Devices that do not support the slot keyword.)

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the output bandwidth usage alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 80 and lower threshold to 60 for output bandwidth usage alarms on slot 1.

<Sysname> system-view

[Sysname] ifmonitor output-usage high-threshold 80 low-threshold 60

Related commands

flow-interval

snmp-agent trap enable ifmonitor

interface

Use interface to enter interface view, create a subinterface and enter its view, or enter the view of an existing subinterface.

Syntax

interface interface-type { interface-number | interface-number.subnumber }

Views

System view

Predefined user roles

network-admin

Parameters

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

Examples

# Enter the view of GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12]

# Create Ethernet subinterface GigabitEthernet 1/0/12.1 and enter its view.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12.1

[Sysname-GigabitEthernet1/0/12.1]

jumboframe enable

Use jumboframe enable to allow jumbo frames within the specified length to pass through.

Use undo jumboframe enable to prevent jumbo frames from passing through.

Use undo jumboframe enable size to restore the default.

Syntax

jumboframe enable [ size ]

undo jumboframe enable [ size ]

Default

The device allows jumbo frames within 10240 bytes to pass through.

Views

Layer 3 Ethernet interface view

Predefined user roles

network-admin

Parameters

size: Sets the maximum length (in bytes) of Ethernet frames that are allowed to pass through. The value range for this argument is 1536 to 10240.

Usage guidelines

If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Allow jumbo frames to pass through GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] jumboframe enable

linkdown trap enable shutdown

Use linkdown trap enable shutdown to enable the function of generating LinkDown notifications upon interface shutdown.

Use undo linkdown trap enable shutdown to disable the function of generating LinkDown notifications upon interface shutdown.

Syntax

linkdown trap enable shutdown

undo linkdown trap enable shutdown

Default

The function of generating LinkDown notifications upon interface shutdown is enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

With the snmp-agent trap enable standard linkdown command executed in system view and the enable snmp trap updown command executed in interface view, the device sends a LinkUp notification when an interface comes up and sends a LinkDown notification when an interface goes down. Because an interface might go down for various reasons, you can use this command to enable or disable the function of generating LinkDown notifications when an interface is shut down and enters the ADM state.

The generated notifications are sent to the SNMP module, and the SNMP module can output the notifications to an NMS.

Examples

# Disable the function of generating LinkDown notifications upon interface shutdown.

<Sysname> system-view

[Sysname] undo linkdown trap enable shutdown

Related commands

enable snmp trap updown (Network Management and Monitoring Command Reference)

snmp-agent trap enable standard (Network Management and Monitoring Command Reference)

loopback

CAUTION:

After you enable loopback testing on an Ethernet interface, the interface does not forward data traffic.

Use loopback to enable loopback testing on an Ethernet interface.

Use undo loopback to disable loopback testing on an Ethernet interface.

Syntax

loopback { external | internal }

undo loopback

Default

Loopback testing is disabled on an Ethernet interface.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

external: Enables external loopback testing on the Ethernet interface.

internal: Enables internal loopback testing on the Ethernet interface.

Usage guidelines

After you enable loopback testing on an Ethernet interface, the Ethernet interface switches to full duplex mode. After you disable loopback testing, the Ethernet interface restores to its duplex setting.

The shutdown, port up-mode, and loopback commands are mutually exclusive.

Examples

# Enable internal loopback testing on GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] loopback internal

port auto-power-down

Use port auto-power-down to enable auto power-down on an Ethernet interface.

Use undo port auto-power-down to disable auto power-down on an Ethernet interface.

Syntax

port auto-power-down

undo port auto-power-down

Default

Auto power-down is disabled on Ethernet interfaces.

Views

Ethernet interface view

Predefined user roles

network-admin

Usage guidelines

When an interface with auto power-down enabled has been down for a specific period of time, both of the following events occur:

· The device automatically stops supplying power to the interface.

· The interface enters the power save mode.

The time period depends on the chip specifications and is not configurable.

When the interface comes up, both of the following events occur:

· The device automatically restores the power supply to the interface.

· The interface restores to its normal state.

Examples

# Enable auto power-down on GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] port auto-power-down

port ifmonitor crc-error

Use port ifmonitor crc-error to configure CRC error packet alarm parameters for an interface.

Use undo port ifmonitor crc-error to restore the default.

Syntax

port ifmonitor crc-error [ ratio ] high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo port ifmonitor crc-error

Default

An interface uses the global CRC error packet alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

ratio: Specifies the alarm thresholds in percentage. If you do not specify this keyword, you configure the alarm thresholds in absolute value.

high-threshold high-value: Specifies the upper threshold for CRC error packet alarms. If you specify the ratio keyword, the value range is 1 to 100. If you do not specify the ratio keyword, the value range is 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for CRC error packet alarms. If you specify the ratio keyword, the value range is 1 to 100. If you do not specify the ratio keyword, the value range is 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for CRC error packets, in the range of 1 to 65535 seconds.

Usage guidelines

You can configure the CRC error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface. (Devices that do not support the slot keyword.)

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for CRC error packet alarms on GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] port ifmonitor crc-error high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

port ifmonitor input-error

Use port ifmonitor input-error to configure input error packet alarm parameters for an interface.

Use undo port ifmonitor input-error to restore the default.

Syntax

port ifmonitor input-error high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo port ifmonitor input-error

Default

An interface uses the global input error packet alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for input error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for input error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for input error packets, in the range of 1 to 65535 seconds.

Usage guidelines

You can configure the input error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface. (Devices that do not support the slot keyword.)

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for input error packet alarms on GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] port ifmonitor input-error high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

port ifmonitor output-error

Use port ifmonitor output-error to configure output error packet alarm parameters for an interface.

Use undo port ifmonitor output-error to restore the default.

Syntax

port ifmonitor output-error high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo port ifmonitor output-error

Default

An interface uses the global output error packet alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for output error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for output error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for output error packets, in the range of 1 to 65535 seconds.

Usage guidelines

You can configure the output error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface. (Devices that do not support the slot keyword.)

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for output error packet alarms on GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] port ifmonitor output-error high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

reset counters interface

Use reset counters interface to clear the interface statistics.

Syntax

reset counters interface [ interface-type [ interface-number ] ]

Views

User view

Predefined user roles

network-admin

Parameters

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

Usage guidelines

Use this command to clear history statistics if you want to collect traffic statistics for a specific time period.

If you do not specify an interface type, this command clears statistics for all interfaces.

If you specify an interface type but do not specify an interface number, this command clears statistics for all interfaces of the specified type.

Examples

# Clear the statistics for GigabitEthernet 1/0/12.

<Sysname> reset counters interface gigabitethernet 1/0/12

Related commands

display counters interface

display counters rate interface

display interface

reset ethernet statistics

Use reset ethernet statistics to clear the Ethernet module statistics.

Syntax

reset ethernet statistics [ slot slot-number ]

Views

User view

Predefined user roles

network-admin

Parameters

slot slot-number: Specifies an IRF member device by its member ID. If you do not specify a member device, this command clears statistics for all IRF member devices.

Examples

# Clear the Ethernet module statistics for the specified slot.

<Sysname> reset ethernet statistics slot 1

Related commands

display ethernet statistics

shutdown

Use shutdown to shut down an Ethernet interface or subinterface.

Use undo shutdown to bring up an Ethernet interface or subinterface.

Syntax

shutdown

undo shutdown

Default

An Ethernet interface or subinterface is up.

Views

Ethernet interface view

Ethernet subinterface view

Predefined user roles

network-admin

Usage guidelines

Some interface configurations might require an interface restart before taking effect.

The shutdown, port up-mode, and loopback commands are mutually exclusive.

Examples

# Shut down and then bring up GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] shutdown

[Sysname-GigabitEthernet1/0/12] undo shutdown

# Shut down and then bring up GigabitEthernet 1/0/12.1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12.1

[Sysname-GigabitEthernet1/0/12.1] shutdown

[Sysname-GigabitEthernet1/0/12.1] undo shutdown

snmp-agent trap enable ifmonitor

Use snmp-agent trap enable ifmonitor to enable interface alarm functions.

Use undo snmp-agent trap enable ifmonitor to disable interface alarm functions.

Syntax

snmp-agent trap enable ifmonitor [ crc-error | input-error | input-usage | output-error | output-usage ] *

undo snmp-agent trap enable ifmonitor [ crc-error | input-error | input-usage | output-error | output-usage ] *

Default

Interface alarm functions are enabled.

Views

System view

Predefined user roles

network-admin

Parameters

crc-error: Enables the CRC error packet alarm function for interfaces.

input-error: Enables the input error packet alarm function for interfaces.

input-usage: Enables the input bandwidth usage alarm function for interfaces.

output-error: Enables the output error packet alarm function for interfaces.

output-usage: Enables the output bandwidth usage alarm function for interfaces.

Examples

# Enable the CRC error packet alarm function for interfaces.

<Sysname> system-view

[Sysname] snmp-agent trap enable ifmonitor crc-error

speed

Use speed to set the speed of an Ethernet interface.

Use undo speed to restore the default.

Syntax

speed { 10 | 100 | 1000 | 10000 | auto }

undo speed

Default

The speed of an Ethernet interface is autonegotiated.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

10: Sets the interface speed to 10 Mbps.

100: Sets the interface speed to 100 Mbps.

1000: Sets the interface speed to 1000 Mbps.

10000: Sets the interface speed to 10000 Mbps.

auto: Enables the interface to negotiate a speed with its peer.

Usage guidelines

Executing both the duplex full and speed 100 command on a GE copper port will shut down the port.

For an Ethernet copper port, use the speed command to set its speed to match the speed of the peer interface.

For a fiber port, use the speed command to set its speed to match the rate of a transceiver module.

Support of an interface for the keywords depends on the interface type. For more information, use the speed ? command in interface view,

Examples

# Configure GigabitEthernet 1/0/12 to autonegotiate the speed.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] speed auto

Layer 3 Ethernet interface or subinterface commands

mtu

Use mtu to set the MTU for an Ethernet interface or subinterface.

Use undo mtu to restore the default.

Syntax

mtu size [ spread ]

undo mtu [ spread ]

Default

The MTU of an Ethernet interface or subinterface is 1500 bytes.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Predefined user roles

network-admin

Parameters

size: Sets the MTU in bytes. The value range for this argument varies by interface type.

spread: Batch modifies the MTU for the subinterfaces of a main interface. Subinterfaces do not support this keyword.

Usage guidelines

A smaller MTU size results in more fragments. When you set the MTU for an interface, consider QoS queue lengths, for example, consider that the default FIFO queue length is 75. To prevent a too small MTU from causing packet drops in QoS queuing, you can perform one of the following configurations:

· Tune the MTU with the mtu command.

· Tune QoS queue lengths with the qos fifo queue-length command.

For more information about the qos fifo queue-length command, see ACL and QoS Command Reference.

The mtu size command executed in main interface view takes effect only on the main interface. The mtu size command executed in subinterface view takes effect only on the subinterface.

The mtu size spread command executed in main interface view can modify the MTU for both the main interface and its subinterfaces. However, the MTU separately configured for a subinterface takes priority.

Examples

# Set the MTU to 1430 bytes for GigabitEthernet 1/0/12.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] mtu 1430

# Set the MTU to 1430 bytes for GigabitEthernet 1/0/12.1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12.1

[Sysname-GigabitEthernet1/0/12.1] mtu 1430

# Set the MTU to 1430 bytes for GigabitEthernet 1/0/12 and its subinterfaces.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/12

[Sysname-GigabitEthernet1/0/12] mtu 1430 spread

This operation may take a long time to modify the MTU of subinterfaces on this interface. Continue? [Y/N]:y

02-Interface Command Reference

flow-interval

linkdown trap enable shutdown

reset counters interface

Layer 3 Ethernet interface or subinterface commands

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