WLAN roaming enables clients to seamlessly roam among wireless services in the same ESS while retaining their IP address and authorization information during the roaming process.

WLAN roaming mechanism

As shown in Figure 1, the client roams from AP 1 to AP 2 as follows:

1. The client comes online from AP 1, and the AC creates a roaming entry for the client.

The entry records the initial SSID at association, PMKID, authentication method, security mode, and roaming VLAN.

2. The client roams to AP 2. The AC examines the roaming entry.

3. The client performs reauthentication and then comes online from AP 2.

Figure 1 WLAN roaming mechanism

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Layer 3 roaming

As shown in Figure 2, the client can roam between APs in different VLANs without special configuration. For the roaming procedure, see "WLAN roaming mechanism."

Figure 2 Layer 3 roaming

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Setting the roaming entry aging time

About this task

Client roaming entries record client PMKs, VLAN, and other authorization information. If a disconnected client connects to an AP before its roaming entry expires, the client can inherit authorization recorded in the entry and achieve fast roaming.

If a disconnected client cannot come online before its entry expires, the system deletes the entry.

This task is not available in inter-AC roaming.

Restrictions and guidelines

Setting the roaming entry aging time to 0 allows the system to delete the roaming entry of a client once the client goes offline. Fast roaming cannot be performed.

Procedure

1. Enter system view.

system-view

2. Enter service template view.

wlan service-template service-template-name

3. Set the roaming entry aging time.

client cache aging-time aging-time

By default, the roaming entry aging time is 180 seconds.

Verifying and maintaining WLAN roaming

To display roam-track information for a client, execute the following command in any view:

display wlan mobility roam-track mac-address mac-address

Example: Configuring intra-AC roaming

Network configuration

As shown in Figure 3, configure intra-AC roaming to enable the client to roam from AP 1 to AP 2. The two APs are managed by the same AC.

Figure 3 Network diagram

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Procedure

# Create a service template named service, set the SSID to 1, and enable the service template.

<AC> system-view

[AC] wlan service-template service

[AC-wlan-st-service] ssid 1

[AC-wlan-st-service] service-template enable

[AC-wlan-st-service] quit

# Create a manual AP named ap1, and specify the AP model and serial ID.

[AC] wlan ap ap1 model WA6320

[AC-wlan-ap-ap1] serial-id 219801A28N819CE0002T

# Bind the service template to radio 1 of AP 1.

[AC-wlan-ap-ap1] radio 1

[AC-wlan-ap-ap1-radio-1] radio enable

[AC-wlan-ap-ap1-radio-1] service-template service

[AC-wlan-ap-ap1-radio-1] quit

[AC-wlan-ap-ap1] quit

# Create a manual AP named ap2, and specify the AP model and serial ID.

[AC] wlan ap ap2 model WA6320

[AC-wlan-ap-ap2] serial-id 219801A28N819CE0003T

# Bind the service template to radio 1 of AP 2.

[AC-wlan-ap-ap2] radio 1

[AC-wlan-ap-ap2-radio-1] radio enable

[AC-wlan-ap-ap2-radio-1] service-template service

[AC-wlan-ap-ap2-radio-1] quit

[AC-wlan-ap-ap2] quit

Verifying the configuration

# Enable the client to come online from AP 1. (Details not shown.)

# Verify that the client associates with AP 1, and the roaming status is N/A, which indicates that the client has not performed any roaming.

[AC] display wlan client verbose

Total number of clients: 1

MAC address : 9cd3-6d9e-6778

IPv4 address : 10.1.1.114

IPv6 address : N/A

Username : N/A

AID : 1

AP ID : 1

AP name : ap1

Radio ID : 1

Channel : 36

SSID : 1

BSSID : 000f-e200-4444

VLAN ID : 1

Sleep count : 242

Wireless mode : 802.11ac

Channel bandwidth : 80MHz

SM power save : Enabled

SM power save mode : Dynamic

Short GI for 20MHz : Supported

Short GI for 40MHz : Supported

Short GI for 80MHz : Supported

Short GI for 160/80+80MHz : Not supported

STBC RX capability : Not supported

STBC TX capability : Not supported

LDPC RX capability : Not supported

SU beamformee capability : Not supported

MU beamformee capability : Not supported

Beamformee STS capability : N/A

Block Ack : TID 0 In

Supported VHT-MCS set : NSS1 0, 1, 2, 3, 4, 5, 6, 7, 8

NSS2 0, 1, 2, 3, 4, 5, 6, 7, 8

Supported HT MCS set : 0, 1, 2, 3, 4, 5, 6, 7,

8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20,

21, 22, 23

Supported rates : 6, 9, 12, 18, 24, 36,

48, 54 Mbps

QoS mode : WMM

Listen interval : 10

RSSI : 62

Rx/Tx rate : 130/11

Authentication method : Open system

Security mode : PRE-RSNA

AKM mode : Not configured

Cipher suite : N/A

User authentication mode : Bypass

Authorization ACL ID : 3001(Not effective)

Authorization user profile : N/A

Authorization CAR : N/A

Roam status : N/A

Key derivation : SHA1

PMF status : Enabled

Forward policy name : Not configured

Online time : 0days 0hours 1minutes 13seconds

FT status : Inactive

# Verify that the AC has a roaming entry for the client.

[AC] display wlan mobility roam-track mac-address 9cd3-6d9e-6778

Total entries: 1

BSSID Created at Online time AC IP address RID AP name

000f-e200-4444 2016-06-14 11:12:28 00hr 01min 16sec 127.0.0.1 1 ap1

# Enable the client roam to AP 2. (Details not shown.)

# Verify that the client has associated with AP 2, and the roaming status is Intra-AC roam.

[AC] display wlan client verbose

Total number of clients: 1

MAC address : 9cd3-6d9e-6778

IPv4 address : 10.1.1.114

IPv6 address : N/A

Username : N/A

AID : 1

AP ID : 2

AP name : ap2

Radio ID : 1

Channel : 36

SSID : 1

BSSID : 000f-e203-7777

VLAN ID : 1

Sleep count : 242

Wireless mode : 802.11ac

Channel bandwidth : 80MHz

SM power save : Enabled

SM power save mode : Dynamic

Short GI for 20MHz : Supported

Short GI for 40MHz : Supported

Short GI for 80MHz : Supported

Short GI for 160/80+80MHz : Not supported

STBC RX capability : Not supported

STBC TX capability : Not supported

LDPC RX capability : Not supported

SU beamformee capability : Not supported

MU beamformee capability : Not supported

Beamformee STS capability : N/A

Block Ack : TID 0 In

Supported VHT-MCS set : NSS1 0, 1, 2, 3, 4, 5, 6, 7, 8

NSS2 0, 1, 2, 3, 4, 5, 6, 7, 8

Supported HT MCS set : 0, 1, 2, 3, 4, 5, 6, 7,

8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20,

21, 22, 23

Supported rates : 6, 9, 12, 18, 24, 36,

48, 54 Mbps

QoS mode : WMM

Listen interval : 10

RSSI : 62

Rx/Tx rate : 130/11

Authentication method : Open system

Security mode : PRE-RSNA

AKM mode : Not configured

Cipher suite : N/A

User authentication mode : Bypass

Authorization ACL ID : 3001(Not effective)

Authorization user profile : N/A

Authorization CAR : N/A

Roam status : Intra-AC roam

Key derivation : SHA1

PMF status : Enabled

Forward policy name : Not configured

Online time : 0days 0hours 5minutes 13seconds

FT status : Inactive

# Verify that the AC has updated the roaming entry for the client.

[AC] display wlan mobility roam-track mac-address 9cd3-6d9e-6778

Total entries: 2

BSSID Created at Online time AC IP address RID AP name

000f-e203-7777 2016-06-14 11:12:28 00hr 01min 02sec 127.0.0.1 1 ap2

000f-e200-4444 2016-06-14 11:12:04 00hr 03min 51sec 127.0.0.1 1 ap1

Configuring enhanced roaming

About enhanced roaming

WLAN supports the following enhanced roaming technologies:

· 802.1X fast roaming—Allows users to come online from a new AP or radio without being reauthenticated. It is applicable only when RSN+802.1X authentication is used.

· MAC fast roaming—Allows users to come online from a new AP or radio without being reauthenticated. It is applicable only when MAC authentication is used.

· 802.11r—Shortens roaming latency to reduce client disconnection rate and improve the service quality.

· 802.11v—Helps 802.11v clients to connect to the optimal AP to improve the service quality.

· Cooperative roaming—Uses IEEE802.11k, IEEE802.11r, and IEEE802.11v to support seamless roaming of clients in an ESS.

802.1X fast roaming

802.1X fast roaming mechanism

Intra-AC roaming

As shown in Figure 4, intra-AC 802.1X fast roaming operates as follows:

1. The client comes online from AP 1 after passing RSN+802.1X authentication. AP 1 creates a roaming entry for the client.

For more information about 802.1X authentication, see "Configuring WLAN security."

2. The client roams to AP 2. The AP examines the roaming entry for the client and triggers 802.1X fast forwarding if the client carries the same PMKID as the AP.

The system uses the cached PMK to perform key negotiation and the client can associate with AP 2 without reauthentication.

NOTE:

The system supports using the following methods to cache PMKID:

· Sticky Key Caching (SKC)—Directly caches the PMKIDs generated during 802.1X authentication of clients.

· Opportunistic Key Caching (OKC)—Uses the currently associated BSSID, client MAC address, and cached PMK to generate a PMKID.

Both methods support 802.1X fast roaming without manual intervention.

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Figure 4 802.1X fast roaming (intra-AC)

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Inter-AC roaming

As shown in Figure 5, inter-AC 802.1X fast roaming operates as follows:

1. AC 1 and AC 2 form a mobility group. The client comes online from AP 1 after passing 802.1X authentication. AC 1 creates a roaming entry for the client.

For more information about 802.1X authentication, see User Access and Authentication Configuration Guide.

2. AC 1 synchronizes the roaming entry to AC 2 through the IADTP tunnel.

3. The client roams to AP 2. AC 2 examines the roaming entry for the client. If the client authentication method is RSN+802.1X and the PMKID carried in the client packet is the same as the PMKID cached on AC 2, AC 2 considers that the client has passed authentication.

The system uses the cached PMK to perform key negotiation and the client can associate with AC 2 without reauthentication.

Figure 5 802.1X fast roaming (inter-AC)

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MAC fast roaming

MAC fast roaming mechanism

As shown in Figure 4, MAC fast roaming operates as follows:

1. The client comes online from AP 1 after passing MAC authentication. AP 1 creates a roaming entry for the client.

For more information about MAC authentication, see "Configuring WLAN security."

2. The client roams to AP 2. AP 2 examines the roaming entry for the client and triggers MAC authentication if fast-connect is enabled.

The client comes online from AP 2 without being reauthenticated.

Figure 6 MAC fast roaming

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Restrictions and guidelines: MAC fast forwarding

802.1X fast roaming supports only roaming between APs managed by the same AC.

Enabling fast-connect for MAC authenticated intra-AC roaming clients

About this task

This feature allows a MAC authentication roaming client that has been authenticated once on the AC to come online from any APs attached to the AC without re-authentication.

Restrictions and guidelines

This feature applies only to MAC authentication wireless clients whose authentication location and association location are both on the AC.

This feature affects the displayed roaming state of inter-AC roaming clients that use MAC authentication and requires special configuration for them.

· If a client has roamed between ACs, its roaming state is N/A in the output from the display wlan client verbose command.

· If the inter-AC roaming clients belong to different VLANs, you must make sure the upstream ports of all the ACs in the same roaming group permit traffic from these VLANs to pass through.

Prerequisites

Before you can configure this feature in a service template, you must disable that service template.

Procedure

1. Enter system view.

system-view

2. Enter service template view.

wlan service-template service-template-name

3. Enable fast-connect for MAC authenticated intra-AC roaming clients.

mac-authentication fast-connect enable

By default, fast-connect is enabled for MAC authenticated intra-AC roaming clients.

802.11r

About 802.11r

802.11r fast BSS transition (FT) minimizes the delay when a client roams from a BSS to another BSS within the same ESS. During 802.11r FT, a client needs to exchange messages with the target AP.

FT supports over-the-air message exchanging method, allowing clients to communicate directly with the target AP for pre-roaming authentication.

Over-the-air FT

As shown in Figure 7, the client is associated with AP 1. Intra-AC roaming through over-the-air FT uses the following process:

1. The client sends an FT authentication request to AP 2.

2. AP 2 sends an FT authentication response to the client.

3. The client sends a reassociation request to AP 2.

4. AP 2 sends a reassociation response to the client.

5. The client roams to AP 2.

Figure 7 Over-the-air FT

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Restrictions and guidelines: 802.11r configuration

When you configure 802.11r, follow these restrictions and guidelines:

· To enable a client that does not support FT to access the WLAN, create two service templates using the same SSID: one enabled with FT and the other not.

· To prevent a client from coming online every time the periodic re-authentication timer expires, do not enable FT and 802.1X periodic re-authentication for the same service template. For more information about 802.1X periodic re-authentication, see "Configuring WLAN security."

· PTK updates are not supported for clients that have been associated with a WLAN through FT. For more information about PTK updates, see "Configuring WLAN security."

· To use FT, you must also specify an AKM mode.

· To use 802.11r, make sure the beacons and probe responses sent by APs carry RSN IE, the cipher suite is CCMP, and local authentication is not used.

· 802.11r supports only intra-AC roaming in the current software version.

· 802.11r takes effect only on clients associated with the AC.

· To configure 802.11r, make sure the service template is disabled.

· Do not enable 802.11r FT and set the WPA3 security mode or enable enhanced open system authentication at the same time. If you do so, the service template cannot be enabled. For more information about WPA3 and enhanced open system authentication, see "Configuring WLAN security."

Configuring 802.11r

1. Enter system view.

system-view

2. Enter service template view.

wlan service-template service-template-name

3. Enable FT.

ft enable

By default, FT is disabled.

4. (Optional.) Set the reassociation timeout timer.

ft reassociation-timeout timeout

By default, the association timeout timer is 20 seconds.

The roaming process is terminated if a client does not send any reassociation requests before the timeout timer expires.

5. (Optional.) Specify a mobility domain ID for the device.

ft mobility-domain-id mobility-domain-id

By default, no mobility domain ID is specified.

With this feature configured, a client can roam between different devices through fast BSS transition (FT) when the two devices have the same mobility domain ID.

This feature takes effect only when FT is enabled.

Example: Configuring over-the-air FT and PSK authentication

Network configuration

As shown in Figure 8, configure intra-AC roaming through over-the-air FT to enable the client to roam between AP 1 and AP 2. Configure PSK as the authentication and key management mode.

Figure 8 Network diagram

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Procedure

# Create service template acstname.

<AC> system-view

[AC] wlan service-template acstname

# Set the SSID to service.

[AC-wlan-st-acstname] ssid service

# Set the authentication and key management mode to PSK, and configure simple string 12345678 as the PSK.

[AC-wlan-st-acstname] akm mode psk

[AC-wlan-st-acstname] preshared-key pass-phrase simple 12345678

# Enable the RSN IE in the beacon and probe responses.

[AC-wlan-st-acstname] cipher-suite ccmp

[AC-wlan-st-acstname] security-ie rsn

# Enable FT.

[AC-wlan-st-acstname] ft enable

# Set the reassociation timeout timer to 50 seconds.

[AC-wlan-st-acstname] ft reassociation-timeout 50

# Enable the service template.

[AC-wlan-st-acstname] service-template enable

[AC-wlan-st-acstname] quit

# Create AP 1, and bind service template acstname to radio 1 of the AP.

[AC] wlan ap 1 model WA6320

[AC-wlan-ap-1] serial-id 219801A28N819CE0002T

[AC-wlan-ap-1] radio 1

[AC-wlan-ap-1-radio-1] service-template acstname

[AC-wlan-ap-1-radio-1] radio enable

[AC-wlan-ap-1-radio-1] quit

[AC-wlan-ap-1] quit

# Create AP 2, and bind service template acstname to radio 1 of the AP.

[AC] wlan ap 2 model WA6320

[AC-wlan-ap-2] serial-id 219801A28N819CE0003T

[AC-wlan-ap-2] radio 1

[AC-wlan-ap-2-radio-1] service-template acstname

[AC-wlan-ap-2-radio-1] radio enable

[AC-wlan-ap-2-radio-1] quit

[AC-wlan-ap-2] quit

Verifying the configuration

# Verify the following information:

· RSN IE is enabled.

· The AKM mode is PSK.

· The cipher suite is CCMP.

· The FT status is Active.

[AC] display wlan client verbose

Total number of clients: 1

MAC address : fc25-3f03-8361

IPv4 address : 10.1.1.114

IPv6 address : N/A

Username : N/A

AID : 1

AP ID : 1

AP name : 1

Radio ID : 1

SSID : service

BSSID : 000f-e266-7788

VLAN ID : 1

Sleep count : 242

Wireless mode : 802.11ac

Channel bandwidth : 80MHz

SM power save : Enabled

SM power save mode : Dynamic

Short GI for 20MHz : Supported

Short GI for 40MHz : Supported

Short GI for 80MHz : Supported

Short GI for 160/80+80MHz : Not supported

STBC RX capability : Not supported

STBC TX capability : Not supported

LDPC RX capability : Not supported

SU beamformee capability : Not supported

MU beamformee capability : Not supported

Beamformee STS capability : N/A

Block Ack : TID 0 In

Supported VHT-MCS set : NSS1 0, 1, 2, 3, 4, 5, 6, 7, 8

NSS2 0, 1, 2, 3, 4, 5, 6, 7, 8

Supported HT MCS set : 0, 1, 2, 3, 4, 5, 6, 7,

8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20,

21, 22, 23

Supported rates : 6, 9, 12, 18, 24, 36,

48, 54 Mbps

QoS mode : WMM

Listen interval : 10

RSSI : 62

Rx/Tx rate : 130/11

Authentication method : Open system

Security mode : RSN

AKM mode : PSK

Encryption cipher : CCMP

User authentication mode : Bypass

Authorization ACL ID : 3001(Not effective)

Authorization user profile : N/A

Authorization CAR : N/A

Roam status : N/A

Key derivation : SHA1

PMF status : Enabled

Forward policy name : Not configured

Online time : 0days 0hours 1minutes 13seconds

FT status : Active

BTM status : Disabled

# Move the client to the coverage of AP 2. (Details not shown.)

# Verify that the authentication method is FT and the roaming status is Intra-AC roam.

[AC] display wlan client verbose

Total number of clients: 1

MAC address : fc25-3f03-8361

IPv4 address : 10.1.1.114

IPv6 address : N/A

Username : N/A

AID : 1

AP ID : 2

AP name : 2

Radio ID : 1

SSID : service

BSSID : 000f-e211-2233

VLAN ID : 1

Sleep count : 242

Wireless mode : 802.11ac

Channel bandwidth : 80MHz

SM power save : Enabled

SM power save mode : Dynamic

Short GI for 20MHz : Supported

Short GI for 40MHz : Supported

Short GI for 80MHz : Supported

Short GI for 160/80+80MHz : Not supported

STBC RX capability : Not supported

STBC TX capability : Not supported

LDPC RX capability : Not supported

SU beamformee capability : Not supported

MU beamformee capability : Not supported

Beamformee STS capability : N/A

Block Ack : TID 0 In

Supported VHT-MCS set : NSS1 0, 1, 2, 3, 4, 5, 6, 7, 8

NSS2 0, 1, 2, 3, 4, 5, 6, 7, 8

Supported HT MCS set : 0, 1, 2, 3, 4, 5, 6, 7,

8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20,

21, 22, 23

Supported rates : 6, 9, 12, 18, 24, 36,

48, 54 Mbps

QoS mode : WMM

Listen interval : 10

RSSI : 62

Rx/Tx rate : 130/11

Authentication method : FT

Security mode : RSN

AKM mode : PSK

Encryption cipher : CCMP

User authentication mode : Bypass

Authorization ACL ID : 3001(Not effective)

Authorization user profile : N/A

Authorization CAR : N/A

Roam status : Intra-AC roam

Key derivation : SHA1

PMF status : Enabled

Forward policy name : Not configured

Online time : 0days 0hours 5minutes 13seconds

FT status : Active

BTM status : Disabled

Example: Configuring over-the-air FT and 802.1X authentication

Network configuration

As shown in Figure 8, configure intra-AC roaming through over-the-air FT to enable the client to roam between AP 1 and AP 2. Configure 802.1X as the authentication and key management mode.

Procedure

# Create service template acstname.

<AC> system-view

[AC] wlan service-template acstname

# Set the SSID to service.

[AC-wlan-st-acstname] ssid service

# Set the AKM mode to 802.1X.

[AC-wlan-st-acstname] akm mode dot1x

# Enable the RSN IE in the beacon and probe responses.

[AC-wlan-st-acstname] cipher-suite ccmp

[AC-wlan-st-acstname] security-ie rsn

# Set the authentication mode to 802.1X for clients.

[AC-wlan-st-acstname] client-security authentication-mode dot1x

[AC-wlan-st-acstname] dot1x domain imc

# Enable FT.

[AC-wlan-st-acstname] ft enable

# Enable the service template.

[AC-wlan-st-acstname] service-template enable

[AC-wlan-st-acstname] quit

# Set the 802.1X authentication mode to EAP.

[AC] dot1x authentication-method eap

# Create RADIUS scheme imcc.

[AC] radius scheme imcc

# Set the IP address of the primary authentication and accounting servers to 10.1.1.3.

[AC-radius-imcc] primary authentication 10.1.1.3

[AC-radius-imcc] primary accounting 10.1.1.3

# Set the shared key for the AC to exchange packets with the authentication and accounting servers to 12345678.

[AC-radius-imcc] key authentication simple 12345678

[AC-radius-imcc] key accounting simple 12345678

# Configure the AC to remove the ISP domain name from usernames sent to the RADIUS server.

[AC-radius-imcc] user-name-format without-domain

[AC-radius-imcc] quit

# Create ISP domain imc, and configure the domain to use RADIUS scheme imcc for authentication, authorization, and accounting.

[AC] domain imc

[AC-isp-imc] authentication lan-access radius-scheme imcc

[AC-isp-imc] authorization lan-access radius-scheme imcc

[AC-isp-imc] accounting lan-access radius-scheme imcc

[AC-isp-imc] quit

# Create AP 1, and bind service template acstname to radio 1 of the AP.

[AC] wlan ap 1 model WA6320

[AC-wlan-ap-1] serial-id 219801A28N819CE0002T

[AC-wlan-ap-1] radio 1

[AC-wlan-ap-1-radio-1] service-template acstname

[AC-wlan-ap-1-radio-1] radio enable

[AC-wlan-ap-1-radio-1] quit

[AC-wlan-ap-1] quit

# Create AP 2, and bind service template acstname to radio 1 of the AP.

[AC] wlan ap 2 model WA6320

[AC-wlan-ap-2] serial-id 219801A28N819CE0003T

[AC-wlan-ap-2] radio 1

[AC-wlan-ap-2-radio-1] service-template acstname

[AC-wlan-ap-2-radio-1] radio enable

[AC-wlan-ap-2-radio-1] quit

[AC-wlan-ap-2] quit

Verifying the configuration

# Verify the following information:

· RSN IE is enabled.

· The AKM mode is 802.1X.

· The cipher suite is CCMP.

· The FT status is Active.

[AC] display wlan client verbose

Total number of clients: 1

MAC address : fc25-3f03-8361

IPv4 address : 10.1.1.114

IPv6 address : N/A

Username : N/A

AID : 1

AP ID : 1

AP name : 1

Radio ID : 1

SSID : service

BSSID : 000f-e266-7788

VLAN ID : 1

Sleep count : 242

Wireless mode : 802.11ac

Channel bandwidth : 80MHz

SM power save : Enabled

SM power save mode : Dynamic

Short GI for 20MHz : Supported

Short GI for 40MHz : Supported

Short GI for 80MHz : Supported

Short GI for 160/80+80MHz : Not supported

STBC RX capability : Not supported

STBC TX capability : Not supported

LDPC RX capability : Not supported

SU beamformee capability : Not supported

MU beamformee capability : Not supported

Beamformee STS capability : N/A

Block Ack : TID 0 In

Supported VHT-MCS set : NSS1 0, 1, 2, 3, 4, 5, 6, 7, 8

NSS2 0, 1, 2, 3, 4, 5, 6, 7, 8

Supported HT MCS set : 0, 1, 2, 3, 4, 5, 6, 7,

8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20,

21, 22, 23

Supported rates : 6, 9, 12, 18, 24, 36,

48, 54 Mbps

QoS mode : WMM

Listen interval : 10

RSSI : 62

Rx/Tx rate : 130/11

Authentication method : Open system

Security mode : RSN

AKM mode : 802.1X

Encryption cipher : CCMP

User authentication mode : 802.1X

Authorization ACL ID : 3001(Not effective)

Authorization user profile : N/A

Authorization CAR : N/A

Roam status : N/A

Key derivation : SHA1

PMF status : Enabled

Forward policy name : Not configured

Online time : 0days 0hours 1minutes 13seconds

FT status : Active

BTM status : Disabled

# Move the client to the coverage of AP 2. (Details not shown.)

# Verify that the authentication method is FT and the roaming status is Intra-AC roam.

[AC] display wlan client verbose

Total number of clients: 1

MAC address : fc25-3f03-8361

IPv4 address : 10.1.1.114

IPv6 address : N/A

Username : N/A

AID : 1

AP ID : 2

AP name : 2

Radio ID : 1

SSID : service

BSSID : 000f-e211-2233

VLAN ID : 1

Sleep count : 242

Wireless mode : 802.11ac

Channel bandwidth : 80MHz

SM power save : Enabled

SM power save mode : Dynamic

Short GI for 20MHz : Supported

Short GI for 40MHz : Supported

Short GI for 80MHz : Supported

Short GI for 160/80+80MHz : Not supported

STBC RX capability : Not supported

STBC TX capability : Not supported

LDPC RX capability : Not supported

SU beamformee capability : Not supported

MU beamformee capability : Not supported

Beamformee STS capability : N/A

Block Ack : TID 0 In

Supported VHT-MCS set : NSS1 0, 1, 2, 3, 4, 5, 6, 7, 8

NSS2 0, 1, 2, 3, 4, 5, 6, 7, 8

Supported HT MCS set : 0, 1, 2, 3, 4, 5, 6, 7,

8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20,

21, 22, 23

Supported rates : 6, 9, 12, 18, 24, 36,

48, 54 Mbps

QoS mode : WMM

Listen interval : 10

RSSI : 62

Rx/Tx rate : 130/11

Authentication method : FT

Security mode : RSN

AKM mode : 802.1X

Encryption cipher : CCMP

User authentication mode : 802.1X

Authorization ACL ID : 3001(Not effective)

Authorization user profile : N/A

Authorization CAR : N/A

Roam status : Intra-AC roam

Key derivation : SHA1

PMF status : Enabled

Forward policy name : Not configured

Online time : 0days 0hours 5minutes 13seconds

FT status : Active

BTM status : Disabled

802.11v

About 802.11v

802.11v defines BSS transition management (BTM), which enables clients to roam to the optimal AP if the signal strength of the current AP is low or if a better AP is discovered.

As shown in Figure 9, BTM operates as follows:

1. If the RSSI of the currently associated AP is too low or the client discovered a better AP, the client sends a BTM query to the associated AP. Upon receiving the query, the AP responds with a BTM request.

A BTM request contains information about recommended BSSs.

2. Upon receiving the BTM request, the client determines whether to disconnect from the current AP and roam to a recommended AP.

3. If the client determines to perform a roaming, it sends a BTM response to the AP. If the client fails to leave the current BSS before the disassociation timer expires, the AP sends a disassociation request to the client and logs off the client.

Figure 9 BSS transition

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Restrictions and guidelines: 802.11v configuration

802.11v supports only intra-AC roaming in the current software version.

Enabling BTM

Restrictions and guidelines

Make sure the service template is disabled before you perform this task.

For BTM to take effect on all clients, use the bss transition-management disassociation command to enable BTM disassociation.

Procedure

1. Enter system view.

system-view

2. Enter service template view.

wlan service-template service-template-name

3. Enable BTM.

bss transition-management enable

By default, BTM is disabled.

Configuring BTM disassociation

About this task

With BTM disassociation configured, an AP sends a BTM request to a client upon receiving a BTM query from the client and guides the client for BSS transition. With forced BTM disassociation configured, the AP forcibly logs off the client if the client fails to leave the current BSS before the disassociation timer expires.

Restrictions and guidelines

Forced BTM disassociation will forcibly log off a client. Use this feature with caution.

For BTM disassociation to take effect, enable BTM first.

Procedure

1. Enter system view.

system-view

2. Enter service template view.

wlan service-template service-template-name

3. Enable BTM disassociation and configure forced disassociation.

bss transition-management disassociation { forced | recommended } [ timer time ]

By default, recommended BTM disassociation is enabled and the disassociation timeout is 90 seconds.

Example: Configuring 802.11v

Network configuration

As shown in Figure 10, configure 802.11v for the AP to guide the client to an optimal AP.

Figure 10 Network diagram

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Procedure

# Create service template service.

<AC> system-view

[AC] wlan service-template service

# Set the SSID to service.

[AC-wlan-st-service] ssid service

# Enable BTM.

[AC-wlan-st-service] bss transition-management enable

# Specify the BTM disassociation timeout as 45 seconds.

[AC-wlan-st-service] bss transition-management disassociation recommended timer 45

# Enable the service template.

[AC-wlan-st-service] service-template enable

[AC-wlan-st-service] quit

# Create AP ap1, specify the AP model and serial ID, enable the AP to obtain BSS candidate information, and bind service template service to radio 1 of AP ap1.

[AC] wlan ap ap1 model WA6320

[AC-wlan-ap-ap1] serial-id 219801A28N819CE0002T

[AC-wlan-ap-ap1] radio 1

[AC-wlan-ap-ap1-radio-1] sacp roam-optimize bss-candidate-list enable

[AC-wlan-ap-ap1-radio-1] service-template service

[AC-wlan-ap-ap1-radio-1] radio enable

[AC-wlan-ap-ap1-radio-1] quit

[AC-wlan-ap-ap1] quit

Verifying the configuration

# Verify that BTM has been enabled.

[AC] display wlan service-template service verbose

Service template name : service

Description : Not configured

SSID : service

SSID-hide : Disabled

User-isolation : Disabled

Service template status : Disabled

Maximum clients per BSS : Not configured

Frame format : Dot3

Seamless roam status : Disabled

Seamless roam RSSI threshold : 50

Seamless roam RSSI gap : 20

VLAN ID : 1

AKM mode : Not configured

Security IE : Not configured

Cipher suite : Not configured

TKIP countermeasure time : 0 sec

PTK lifetime : 43200 sec

PTK rekey : Enabled

GTK rekey : Enabled

GTK rekey method : Time-based

GTK rekey time : 86400 sec

GTK rekey client-offline : Disabled

WPA3 status : Disabled

PPSK : Disabled

PPSK Fail Permit : Enabled

User authentication mode : Bypass

Intrusion protection : Disabled

Intrusion protection mode : Temporary-block

Temporary block time : 180 sec

Temporary service stop time : 20 sec

Fail VLAN ID : Not configured

802.1X handshake : Disabled

802.1X handshake secure : Disabled

802.1X domain : Not configured

MAC-auth domain : Not configured

Max 802.1X users per BSS : 512

Max MAC-auth users per BSS : 512

802.1X re-authenticate : Disabled

Authorization fail mode : Online

Accounting fail mode : Online

Authorization : Permitted

Key derivation : SHA1

PMF status : Disabled

Hotspot policy number : Not configured

Forwarding policy status : Disabled

Forwarding policy name : Not configured

Forwarder : AC

FT status : Disabled

QoS trust : Port

QoS priority : 0

BTM status : Enabled

# Verify that the client has come online.

<AC> display wlan client

Total number of clients: 3

MAC address Username AP name R IP address VLAN

4581-61ac-885a N/A ap1 1 192.168.66.230 1

# Verify that the client has been logged off 45 seconds after the AP recommends an optimal AP for the client. (Details not shown.)

Cooperative roaming

About cooperative roaming

Cooperative roaming is defined by H3C to provide AP- and wireless client-guided roaming of wireless clients in an ESS by using IEEE802.11k, IEEE802.11r, and IEEE802.11v.

· 802.11k defines Beacon radio measurement, allowing monitoring of channel quality and resource performance on both 2.4 GHz and 5 GHz channels.

· 802.11r defines Fast BSS Transition (FT) to shorten transmission delay during client roaming, reducing disconnection rate and improving the roaming service quality.

· 802.11v defines BSS Transition Management (BTM) to guide 802.11v clients to the optimal AP, improving the access service quality.

Cooperative roaming also supports using APs to monitor 802.11v client signal strength and can proactively guide clients to better services.

Restrictions and guidelines: Cooperative roaming configuration

Cooperative roaming supports only intra-AC roaming in the current software version.

To use cooperative roaming, make sure the APs support Wi-Fi 6.

Configuring client anti-sticky

About this task

This feature enables APs to examine the signal strength of clients at the specified intervals. For an 802.11v client, its associated AP triggers a BSS transition to guide the client to a better BSS if the signal strength of the client is lower than the threshold. For a non-802.11v client, no action is performed.

Restrictions and guidelines

ACL-based client anti-sticky takes effect only when client anti-sticky is enabled.

You can bind only one ACL rule to a radio.

You can use the display wlan client verbose command to view client RSSIs, and configure ACL-based client anti-sticky based on the RSSIs.

Procedure

1. Enter system view.

system-view

2. Enter AP view or an AP group's AP model view.

¡ Enter AP view.

wlan ap ap-name

¡ Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3. Enter radio view.

radio radio-id

4. Configure client anti-sticky.

sacp anti-sticky { disable | enable [ rssi rssi-value ] [ interval interval ] [ forced-logoff ] }

By default:

¡ In radio view, a radio uses the configuration in an AP group's radio view.

¡ In an AP group's radio view, client anti-sticky is enabled.

5. (Optional.) Configure ACL-based client anti-sticky.

¡ In radio view:

sacp anti-sticky acl { acl-number rssi rssi-value | remove }

¡ In an AP group's radio view:

sacp anti-sticky acl acl-number [ rssi rssi-value ]

By default:

¡ In radio view, a radio uses the configuration in AP group view.

¡ In an AP group's radio view, ACL-based client anti-sticky is not configured.

If you specify the remove keyword when executing the command in radio view, the radio does not perform ACL-based client anti-sticky.

Enabling an AP to obtain BSS candidate information

About this task

This feature enables an AP to send Beacon requests at specific intervals to clients that support Beacon measurement and obtain information about BSSs detected by the clients. Upon receiving such a request, a client responds with a Beacon Report frame to report BSS information.

With this feature disabled, the AP stops updating BSS candidate information and deletes all the candidates after the aging time expires.

If both this feature and BSS transition management are enabled, the system can guide clients to roam to better services based on BSS candidate information.

Restrictions and guidelines

This feature takes effect only on clients that come online after the feature is configured.

To examine if a client supports beacon measurement, use the display wlan client rm-capabilities command.

Procedure

1. Enter system view.

system-view

2. Enter AP view or an AP group's AP model view.

¡ Enter AP view.

wlan ap ap-name

¡ Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3. Enter radio view.

radio radio-id

4. Enable an AP to obtain BSS candidate information.

sacp roam-optimize bss-candidate-list { disable | enable [ interval interval ] }

By default:

¡ In radio view, an AP uses the configuration in an AP group's radio view.

¡ In an AP group's radio view, the BSS candidate obtaining feature is disabled.

Enabling data transmission holding during roaming

About this task

With advanced data transmission holding during roaming enabled, the device caches the data packets and sends the cached packets to the client to reduce the packet loss when the client signal strength is lower than the RSSI threshold specified by client anti-sticky. With advanced data transmission holding during roaming disabled, the device ages out the cached packets after a period of time and will not send the packets to the client. As a best practice, enable advanced data transmission holding during roaming in the cooperative roaming scenario enabled with client anti-sticky.

Restrictions and guidelines

To make this feature take effect, enable client association at the AC and enable the AC to forward client data traffic.

This feature is not supported in an AC hierarchy network.

Procedure

1. Enter system view.

system-view

2. Enter service template view.

wlan service-template service-template-name

3. Enable advanced data transmission holding during roaming.

sacp roam-optimize traffic-hold enable advanced

By default, advanced data transmission holding during roaming is disabled.

Verifying and maintaining cooperative roaming

Perform display tasks in any view.

· Display running configuration for the specified AP or all APs.

display wlan ap { all | name ap-name } running-configuration [ verbose ]

· Display client information.

display wlan client [ ap ap-name [ radio radio-id ] | mac-address mac-address | service-template service-template-name | frequency-band { 2.4 | 5 } | vlan vlan-id ] [ verbose ]

· Display radio resource measurement capabilities reported by clients.

display wlan client rm-capabilities [ mac-address mac-address ]

· Display the client roaming history.

display wlan sacp move-history [ mac-address mac-address ]

· Display service template information.

display wlan service-template [ service-template-name ] [ verbose ]

NOTE:

For more information about the display wlan service-template and display wlan client commands, see WLAN access commands in WLAN Command Reference.

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Configuring mobility groups

About mobility groups

A mobility group contains multiple member devices among which clients can roam without IP or authorization changes. Mobility groups expand the scale in which clients can roam.

Terminology

· Inter Access Device Tunneling Protocol—IADTP is an H3C-proprietary protocol that provides a generic packet encapsulation and transport mechanism for devices to securely communicate with each other. Devices that provide roaming services establish an IADTP tunnel with each other to exchange control messages and client information.

· Home AC—An HA is an AC that manages the AP with which a wireless client associates for the first time.

· Foreign AC —An FA is an AC with which a client associates after inter-AC roaming.

· Mobility group—A group that contains multiple member devices among which clients can roam.

Mobility group mechanism

A mobility group enables clients to roam among APs that are managed by different ACs. These ACs must be in the same mobility group and have established an IADTP tunnel with each other.

Figure 11 Mobility group mechanism

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As shown in Figure 11, inter-AC roaming uses the following procedure:

1. The client comes online from AP 2. AC 1 creates a roaming entry for the client and sends the information to AC 2 through the IADTP tunnel.

2. The client roams to AP 3. AC 2 examines the roaming entry for the client and determines whether to perform fast roaming.

If the client uses RSN + 802.1X authentication and carries the same PMKID as the AC, fast roaming is used, and the client can associate with AP 3 without reauthentication If it is not, the client must be reauthenticated before associating with AP 3.

3. The client associates with AP 3. AC 2 sends a roaming request to AC 1.

4. AC 1 verifies the roaming request and performs either of the following operations:

¡ Sends a roaming response that indicates roaming failure to AC 2 if the request is invalid. AC 2 logs off the client.

¡ Saves the roaming trace and roam-out information and sends a roaming response that indicates roaming success to AC 2 if the request is valid. AC 2 saves roaming-in information for the client.

IADTP tunnel establishment

A device in a mobility group can act as a client to initiate connection requests or act as a server to listen for and respond to the connection requests.

Figure 12 Establishing an IADTP tunnel

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As shown in Figure 12, two devices establish an IADTP tunnel by using the following procedure:

1. Device A sends a join request to Device B.

2. Upon receiving the join request, Device B uses the local configuration and packet content to identify whether Device A is in the same mobility group.

¡ If they are in the same mobility group, Device B returns a join response with a result code representing success.

¡ If they are in different mobility groups, Device B returns a join response with a result code representing failure.

3. Upon receiving the join response, Device A examines the result code in the response.

¡ If the result code represents failure, Device A does not return any packets.

¡ If the result code represents success, Device A sends a join confirm to Device B.

4. Upon receiving the join confirm, Device B establishes an IADTP tunnel with Device A.

Restrictions and guidelines: Mobility group configuration

You can configure APs by using the following methods:

· Configure APs one by one in AP view.

· Assign APs to an AP group and configure the AP group in AP group view.

· Configure all APs in global configuration view.

For an AP, the settings made in these views for the same parameter take effect in descending order of AP view, AP group view, and global configuration view.

For a service template where an AP is configured as the client authenticator, WLAN roaming is not supported. For more information about client authentication, see User Access and Authentication Configuration Guide.

For RSN + 802.1X clients from different VLANs to roam between devices within a mobility group, make sure uplink interfaces of the member devices permit all client VLANs.

For 802.1X clients that perform inter-AC roaming, the clients can inherit the roaming VLAN, but the roaming status is displayed as N/A. If the clients belong to different VLANs, the upstream interfaces of ACs in the same roaming group must allow the VLANs of the 802.1X clients to pass through.

Mobility group tasks at a glance

To configure mobility groups, perform the following tasks:

1. Creating a mobility group

2. (Optional.) Setting an authentication mode for IADTP control messages

3. Specifying an IP address type for IADTP tunnels

4. Specifying the source IP address for establishing IADTP tunnels

5. (Optional.) Setting the DSCP value for IADTP keepalive packets

6. Adding a mobility group member

Perform one of the following tasks:

¡ Manually adding a mobility group member

¡ Enabling automatic group member discovery

7. (Optional.) Specifying the mobility group member role of a device

8. (Optional.) Disabling IADTP data tunnels

9. (Optional.) Enabling roaming relay

10. Enabling a mobility group

11. (Optional.) Enabling tunnel isolation for mobility groups

12. (Optional.) Enabling SNMP notifications for mobility groups

Creating a mobility group

Restrictions and guidelines

For inter-device roaming to operate correctly, create the same mobility group and add members to each device in the mobility group.

You can create only one mobility group on the device.

Procedure

1. Enter system view.

system-view

2. Create a mobility group and enter its view.

wlan mobility group group-name

Setting an authentication mode for IADTP control messages

About this task

This feature enables the device to verify the integrity of control messages transmitted over IADTP tunnels. WLAN roaming supports only the MD5 algorithm.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Set an authentication mode for IADTP control messages.

authentication-mode authentication-mode { cipher | simple } string

By default, the device does not verify the integrity of IADTP control messages.

Specifying an IP address type for IADTP tunnels

About this task

You must specify an IP address type for IADTP tunnels after you create a mobility group.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Specify an IP address type for IADTP tunnels.

tunnel-type ipv4

By default, the IP address type for IADTP tunnels is IPv4.

Specifying the source IP address for establishing IADTP tunnels

About this task

A device uses the specified source IP address to establish IADTP tunnels with other member devices within the same mobility group.

Restrictions and guidelines

Only the IP address type that is the same as the IP address type for IADTP tunnels takes effect.

Make sure the mobility group is disabled before you specify the source IP address for establishing IADTP tunnels.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Specify the source IP address for establishing IADTP tunnels.

source ip ipv4-address

By default, no source IP address is specified for establishing IADTP tunnels.

Setting the DSCP value for IADTP keepalive packets

About this task

The DSCP value of an IP packet specifies the priority level of the packet and affects the transmission priority of the packet. A greater DSCP value means a higher packet priority.

In a scenario where a device establishes IADTP tunnels with other devices across NAT devices, two devices use IPsec for tunnel encryption and establishment. To prevent IADTP tunnel disconnection because the device cannot receive any IADTP keepalive packets from the peer when the IADTP tunnel is busy, set the DSCP value by using this feature.

Restrictions and guidelines

As a best practice, set the DSCP value to 63 for IADTP keepalive packets.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Set the DSCP value for IADTP keepalive packets.

tunnel-dscp dscp-value

The default setting is 0.

Adding a mobility group member

Manually adding a mobility group member

About this task

Members in a mobility group are identified by their IP addresses used to establish IADTP tunnels.

You can specify VLANs for a member, so that other members in the mobility group can directly forward client data of the member from the specified VLANs. If you do not specify VLANs for the member, its client data cannot be directly forwarded by another member in the mobility group unless the clients roam to that member.

Restrictions and guidelines

A device can belong to only one mobility group.

You can add a maximum of 31 IPv4 members to a mobility group.

When you specify VLANs for a mobility group member, follow these restrictions and guidelines:

· If a mobility group has multiple members, make sure no loops exist among IADTP tunnels between members within the mobility group.

· Make sure the VLANs have not been used by interfaces or services.

· Do not assign VLANs that have been specified for a member to interfaces or services.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Add a mobility group member.

member ip ipv4-address [ vlan vlan-id-list ]

Enabling automatic group member discovery

About this task

Members in a mobility group are identified by their IP addresses used to establish IADTP tunnels. Only members whose IP address type is the same as the IP address type of IADTP tunnels take effect.

This feature enables a device to automatically discover member devices in a mobility group by broadcasting its source IP address in the group. Member devices in the group that receive the IP address automatically establish IADTP tunnels with the device. The device joins the mobility group after it establishes IADTP tunnels with all the other members.

Restrictions and guidelines

A device can belong to only one mobility group.

You can add a maximum of 31 IPv4 members to a mobility group. When the maximum number is reached, the device stops establishing IADTP tunnels with newly discovered devices.

The automatic discovery feature can add only devices in the same subnet as the source IP address.

Prerequisites

Execute the source command to specify the source IP address used for establishing IADTP tunnels.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Enable automatic group member discovery.

member auto-discovery [ interval interval ]

By default, automatic group member discovery is disabled.

Specifying the mobility group member role of a device

About this task

This feature applies to a scenario where a device establishes an IADTP tunnel with another device in the same mobility group across a NAT device. In this scenario, the device with a lower IP address acts as the client to initiate a connection request to the device with a higher IP address. If the device with a lower IP address resides in the public network, the IADTP tunnel cannot be established. To ensure successful establishment of the IADTP tunnel in this case, specify the device in the private network as the client to initiate the connection request.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Specify the mobility group member role of the device.

role { client | server }

By default, a member device with a higher IP address acts as the server, and a member device with a lower IP address acts as the client.

Disabling IADTP data tunnels

About this task

CAUTION:

To avoid data loss, do not disable IADTP data tunnels if no service ports are specified on the device for client VLANs.

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This feature enables a device to forward client traffic directly out of client VLANs' service ports, instead of through the IADTP data tunnel. This reduces the device's workload caused by processing broadcast packets received from IADTP data tunnels and saves resources for maintaining these tunnels.

Restrictions and guidelines

You must enable or disable IADTP tunnels on all devices in a mobility group.

You can configure this feature only when the mobility group is disabled.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Disable IADTP data tunnels.

data-tunnel disable

By default, IADTP data tunnels are enabled.

Enabling roaming relay

About this task

In a WLAN, client roaming will gradually turn the WLAN into a fully meshed network because any two devices must establish a tunnel with each other for roaming entry exchanging. In a large network, establishing and maintaining such tunnels can consume a lot of bandwidth resources, increasing network complexity and reducing availability. Roaming relay is introduced to resolve this issue.

With this feature configured, the device enabled with roaming relay acts as a relay device to establish an IADTP tunnel with each non-relay device, forming a star topology. Non-relay devices do not need to establish tunnels with each other. These non-relay devices synchronize roaming entries to the relay device and, upon a client roaming, request the client entry from the relay device.

Restrictions and guidelines

Make sure the mobility group is disabled before you configure this feature.

To use roaming relay, you must enable roaming relay on a device and configure the device as the only mobility group member for the other devices in the same mobility group.

You can enable roaming relay on only one device in a mobility group.

If clients belong to different VLANs, make sure the tunnel interfaces on the relay device permit packets from all client VLANs.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Enable roaming relay.

roam-relay enable

By default, roaming relay is disabled.

Enabling a mobility group

About this task

This feature enables the device to establish IADTP tunnels and synchronize roaming entries with member devices.

Procedure

1. Enter system view.

system-view

2. Enter mobility group view.

wlan mobility group group-name

3. Enable the mobility group.

group enable

By default, a mobility group is disabled.

Enabling tunnel isolation for mobility groups

About this task

Tunnel isolation prevents devices from forwarding packets between tunnels in a mobility group and avoids broadcast storm when loops exist among devices in the mobility group.

Procedure

1. Enter system view.

system-view

2. Enable tunnel isolation for mobility groups.

wlan mobility-group-isolation enable

By default, tunnel isolation is enabled for mobility groups.

Enabling SNMP notifications for mobility groups

About this task

To report critical mobility group events to an NMS, enable SNMP notifications for WLAN roaming. For mobility group event notifications to be sent correctly, you must also configure SNMP on the device. For more information about SNMP configuration, see Network Management and Monitoring Configuration Guide.

Procedure

1. Enter system view.

system-view

2. Enable SNMP notifications for mobility group.

snmp-agent trap enable wlan mobility

By default, SNMP notifications for mobility group are disabled.

Verifying and maintaining mobility group

Perform display tasks in any view.

· Display information about clients that have roamed to or from the device.

display wlan mobility { roam-in | roam-out } [ member ip ipv4-address ]

· Display mobility group information.

display wlan mobility group

Mobility group configuration examples

Example: Configuring a mobility group

Network configuration

As shown in Figure 13, configure a mobility group to enable the client to roam from AP 2 to AP 3 that are managed by different ACs.

Figure 13 Network diagram

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Procedure

1. Configure AC 1:

# Create a service template named service, set the SSID to office, and enable the service template.

<AC1> system-view

[AC1] wlan service-template service

[AC1-wlan-st-test] ssid office

[AC1-wlan-st-test] service-template enable

[AC1-wlan-st-test] quit

# Create a manual AP named ap1, and specify the AP model and serial ID.

[AC1] wlan ap ap1 model WA6320

[AC1-wlan-ap-ap1] serial-id 219801A28N819CE0002T

# Bind the service template to radio 1 of AP 1.

[AC1-wlan-ap-ap1] radio 1

[AC1-wlan-ap-ap1-radio-1] radio enable

[AC1-wlan-ap-ap1-radio-1] service-template service

[AC1-wlan-ap-ap1-radio-1] quit

[AC1-wlan-ap-ap1] quit

# Create a manual AP named ap2, and specify the AP model and serial ID.

[AC1] wlan ap ap2 model WA6320

[AC1-wlan-ap-ap2] serial-id 219801A28N819CE0003T

# Bind the service template to radio 1 of AP 2.

[AC1-wlan-ap-ap2] radio 1

[AC1-wlan-ap-ap2-radio-1] radio enable

[AC1-wlan-ap-ap2-radio-1] service-template service

[AC1-wlan-ap-ap2-radio-1] quit

[AC1-wlan-ap-ap2] quit

# Create a mobility group named office.

[AC1] wlan mobility group office

# Specify the IP address type for IADTP tunnels as IPv4.

[AC1-wlan-mg-office] tunnel-type ipv4

# Specify the source IP address for establishing IADTP tunnels as 10.1.4.22.

[AC1-wlan-mg-office] source ip 10.1.4.22

# Add AC 2 to the mobility group.

[AC1-wlan-mg-office] member ip 10.1.4.23

# Enable the mobility group.

[AC1-wlan-mg-office] group enable

[AC1-wlan-mg-office] quit

2. Configure AC 2:

# Create a service template named service, specify the SSID as office, and enable the service template.

<AC2> system-view

[AC2] wlan service-template service

[AC2-wlan-st-service] ssid office

[AC2-wlan-st-service] service-template enable

[AC2-wlan-st-service] quit

# Create a manual AP named ap3, and specify the AP model and serial ID.

[AC2] wlan ap ap3 model WA6320

[AC2-wlan-ap-ap3] serial-id 219801A28N819CE0004T

# Bind the service template to radio 1 of AP 3.

[AC2-wlan-ap-ap3] radio 1

[AC2-wlan-ap-ap3-radio-1] radio enable

[AC2-wlan-ap-ap3-radio-1] service-template service

[AC2-wlan-ap-ap3-radio-1] quit

[AC2-wlan-ap-ap3] quit

# Create a manual AP named ap4, and specify the AP model and serial ID.

[AC2] wlan ap ap4 model WA6320

[AC2-wlan-ap-ap4] serial-id 219801A28N819CE0005T

# Bind the service template to radio 1 of AP 4.

[AC2-wlan-ap-ap4] radio 1

[AC2-wlan-ap-ap4-radio-1] radio enable

[AC2-wlan-ap-ap4-radio-1] service-template service

[AC2-wlan-ap-ap4-radio-1] quit

[AC2-wlan-ap-ap4] quit

# Create a mobility group named office.

[AC2] wlan mobility group office

# Specify the IP address type for IADTP tunnels as IPv4.

[AC2-wlan-mg-office] tunnel-type ipv4

# Specify the source IP address for establishing IADTP tunnels as 10.1.4.23.

[AC2-wlan-mg-office] source ip 10.1.4.23

# Add AC 2 to the mobility group.

[AC2-wlan-mg-office] member ip 10.1.4.22

# Enable the mobility group.

[AC2-wlan-mg-office] group enable

[AC2-wlan-mg-office] quit

Verifying the configuration

# Verify that a mobility group has been created on AC 1.

[AC1] display wlan mobility group

Mobility group name: office

Tunnel type: IPv4

Source IPv4: 10.1.4.22

Source IPv6: Not configured

Authentication method: Not configured

Mobility group status: Enabled

Member entries: 1

IP address State Online time

10.1.4.23 Up 00hr 00min 12sec

# Verify that a mobility group has been created on AC 2.

[AC2] display wlan mobility group

Mobility group name: office

Tunnel type: IPv4

Source IPv4: 10.1.4.23

Source IPv6: Not configured

Authentication method: Not configured

Mobility group status: Enabled

Member entries: 1

IP address State Online time

10.1.4.22 Up 00hr 00min 05sec

# Get the client online on AP 2 and then make the client roam to AP 3. (Details not shown.)

# Display client roaming information on AC 1 to verify that the client came online from AP 2 and roamed to AP 3.

[AC1] display wlan mobility roam-track mac-address 9cd3-6d9e-6778

Total entries: 2

BSSID Created at Online time AC IP address RID AP name

000f-e203-8889 2016-06-14 11:12:28 00hr 06min 56sec 10.1.4.23 1 ap3

000f-e203-7777 2016-06-14 11:11:28 00hr 03min 30sec 127.0.0.1 1 ap2

# On AC 1, verify that the client has roamed to AC 2.

<AC1> display wlan mobility roam-out

Total entries: 1

MAC address BSSID VLAN ID Online time FA IP address

9cd3-6d9e-6778 000f-e203-8889 1 00hr 01min 59sec 10.1.4.23

# On AC 2, verify that the client has associated with AP 3, and the roaming status is Inter-AC roam.

<AC2> display wlan client verbose

Total number of clients: 1

MAC address : 9cd3-6d9e-6778

IPv4 address : 10.1.1.114

IPv6 address : N/A

Username : N/A

AID : 1

AP ID : 3

AP name : ap3

Radio ID : 1

Channel : 36

SSID : 1

BSSID : 000f-e203-8889

VLAN ID : 1

Sleep count : 242

Wireless mode : 802.11ac

Channel bandwidth : 80MHz

SM power save : Enabled

SM power save mode : Dynamic

Short GI for 20MHz : Supported

Short GI for 40MHz : Supported

Short GI for 80MHz : Supported

Short GI for 160/80+80MHz : Not supported

STBC RX capability : Not supported

STBC TX capability : Not supported

LDPC RX capability : Not supported

SU beamformee capability : Not supported

MU beamformee capability : Not supported

Beamformee STS capability : N/A

Block Ack : TID 0 In

Supported VHT-MCS set : NSS1 0, 1, 2, 3, 4, 5, 6, 7, 8

NSS2 0, 1, 2, 3, 4, 5, 6, 7, 8

Supported HT MCS set : 0, 1, 2, 3, 4, 5, 6, 7,

8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20,

21, 22, 23

Supported rates : 6, 9, 12, 18, 24, 36,

48, 54 Mbps

QoS mode : WMM

Listen interval : 10

RSSI : 62

Rx/Tx rate : 130/11

Authentication method : Open system

Security mode : PRE-RSNA

AKM mode : Not configured

Cipher suite : N/A

User authentication mode : Bypass

Authorization ACL ID : 3001(Not effective)

Authorization user profile : N/A

Authorization CAR : N/A

Roam status : Inter-AC roam

Key derivation : SHA1

PMF status : Enabled

Forward policy name : Not configured

Online time : 0days 0hours 5minutes 13seconds

FT status : Inactive

# Verify that the client has roamed from AC 1 to AC 2.

<AC2> display wlan mobility roam-in

Total entries: 1

MAC address BSSID VLAN ID HA IP address

9cd3-6d9e-6778 000f-e203-8889 1 10.1.4.22

27-WLAN Configuration Guide (AC)

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Restrictions and guidelines

Procedure

Network configuration

Procedure

Verifying the configuration

Intra-AC roaming

Inter-AC roaming

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Prerequisites

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Over-the-air FT

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Verifying the configuration

Network configuration

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Verifying the configuration

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Network configuration

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Verifying the configuration

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Specifying the source IP address for establishing IADTP tunnels

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Prerequisites

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Network configuration

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Verifying the configuration

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