05-H3C_S12500-S_MPLS_TE典型配置举例
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H3C S12500-S MPLS TE典型配置举例
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目 录
MPLS TE(Traffic Engineering,流量工程)结合了MPLS技术与流量工程,通过建立沿着指定路径的LSP隧道进行资源预留(这种LSP也称为CRLSP,即基于约束路由的LSP),使网络流量绕开拥塞节点,达到平衡网络流量的目的。
MPLS TE可以通过静态和动态两种方式建立CRLSP:
· 静态方式是指:在流量经过的每一跳设备上(包括Ingress、Transit和Egress)分别手工指定入标签、出标签、流量所需的带宽等信息,从而建立满足约束条件的CRLSP。静态方式的优点是配置简单,缺点是不能根据网络的变化动态调整建立的CRLSP;
· 动态方式是指:根据链路状态信息计算出路径后,通过标签分发协议(如RSVP-TE)通告标签,并在经过的节点上为流量预留所需的带宽资源,从而建立满足约束条件的CRLSP。该方式的优点是能根据网络的变化动态调整建立的CRLSP,且支持CRLSP备份、快速重路由等功能,缺点是配置复杂。
本文着重介绍通过RSVP-TE动态建立CRLSP,从而建立MPLS TE隧道的典型配置举例。
MPLS TE中有两种网络保护技术,分别是FRR和CRLSP备份:
· FRR(Fast Reroute,快速重路由)是MPLS TE中实现网络局部保护的技术。开启隧道的FRR功能后,当主CRLSP上的某条链路或某个节点失效时,流量会被切换到Bypass隧道上。同时,隧道的Ingress节点尝试建立新的CRLSP。新的CRLSP建立成功后,流量将切换到新的CRLSP。FRR的切换速度可以达到50ms,能够最大程度减少网络故障时数据的丢失。
· CRLSP备份是指通过备份CRLSP对主CRLSP进行保护。当Ingress节点感知到主CRLSP不可用时,将流量切换到备份CRLSP上,当主CRLSP路径恢复后再将流量切换回来,以实现对主CRLSP的备份保护。
FRR和CRLSP备份的不同之处在于:CRLSP备份是一种端到端的路径保护,对整条CRLSP提供保护,而FRR则是一种局部保护措施,只能保护CRLSP中的某条链路或某个节点。并且,FRR是一种快速响应的临时性保护措施,对于切换时间有严格要求,CRLSP备份则没有时间要求。在实际应用中是配置FRR还是CRLSP备份,可以根据上述两种技术的特点来进行选择。本文将介绍FRR的典型应用。
根据保护的对象不同,FRR分为两类:
· 链路保护:又称为Next-hop(NHOP)保护。PLR(Point of Local Repair,本地修复节点)和MP(Merge Point,汇聚点)之间有直接链路连接,主CRLSP经过这条链路。当这条链路失效时,流量可以切换到Bypass隧道上。如图1所示,主CRLSP是Device A→Device B→Device C→Device D,Bypass隧道是Device B→Device E→Device C。
图1 FRR链路保护示意图
· 节点保护:又称为Next-next-hop(NNHOP)保护。PLR和MP之间通过一台设备连接,主CRLSP经过这台设备。当这台设备失效时,流量可以切换到Bypass隧道上。如图2所示,主CRLSP是Device A→Device B→Device C→Device D→Device E,Bypass隧道是Device B→Device F→Device D,Device C是被保护的设备。
图2 FRR节点保护技术示意图
本文着重介绍链路保护的MPLS TE FRR典型配置举例。
本文档不严格与具体软、硬件版本对应,如果使用过程中与产品实际情况有差异,请参考相关产品手册,或以设备实际情况为准。
本文档中的配置均是在实验室环境下进行的配置和验证,配置前设备的所有参数均采用出厂时的缺省配置。如果您已经对设备进行了配置,为了保证配置效果,请确认现有配置和以下举例中的配置不冲突。
本文档假设您已了解MPLS TE特性。
企业A和企业B分别有总部和分支机构两个站点,均通过运营商的MPLS网络进行互联。两企业的分支机构均有重要数据,需要穿越MPLS网络备份到总部服务器上。企业A的数据流量的最大带宽为20000kbps,企业B的数据流量的最大带宽为30000kbps。
在如图3所示的网络环境中,每条链路的最大带宽为50000kbps,最大可预留带宽为40000kbps,可通过部署RSVP-TE服务,自动为两个用户分别建立满足其带宽需求的MPLS TE隧道。
图3 使用RSVP-TE配置MPLS TE隧道典型配置举例组网图
· 为了使用RSVP-TE配置MPLS TE隧道,需要在骨干网的设备上配置MPLS、MPLS TE和RSVP-TE功能。
· 为了满足两个企业用户同时在运营商MPLS网络中传输数据,并且拥有足够的隧道带宽,需要在MPLS TE隧道的Ingress节点上为两个用户分别创建Tunnel接口,并指定隧道带宽。
· 为了保证每条链路具有足够的带宽和最大可预留带宽,需要在MPLS TE隧道经过的各个接口上配置链路的MPLS TE属性,指定链路最大带宽和最大可预留带宽。
· 为了在各个节点上生成TEDB,从而计算出到达某个节点的符合约束条件的最短路径,需要在骨干网中配置OSPF支持MPLS TE,以便各个节点通过OSPF路由协议发布链路的MPLS TE相关属性。
· 为了实现使用RSVP-TE分发MPLS TE标签并建立CRLSP,需要在MPLS TE隧道的Ingress节点上配置通过RSVP-TE自动建立CRLSP。
· 为了使流量沿着MPLS TE隧道转发,需要在MPLS TE隧道的Ingress节点上配置静态路由,将流量引入MPLS TE隧道。
本举例是在S12500-S-CMW710-R7150P02版本上进行配置和验证的。
· 在采用RSVP-TE动态建立CRLSP时,必须配置IGP的TE扩展(目前支持OSPF TE和ISIS TE),否则,不能形成TEDB(TE DataBase,流量工程数据库)。这种情况下计算出的路径是由IGP路由得到的,而不是CSPF(Constraint-based Shortest Path First,基于约束的最短路径优先)计算出来的。
· 进行本案例配置之前,需要先全局关闭STP功能,或为每个VLAN映射一个MSTP实例,否则可能会阻断环路中的一条链路。
(1) 配置各接口的IP地址
# 按照图3配置各接口的IP地址和掩码,包括LoopBack接口,下面以Switch A为例,其它设备配置方法类似,具体配置过程略。
<SwitchA> system-view
[SwitchA] vlan 10
[SwitchA-vlan10] port ten-gigabitethernet 1/0/1
[SwitchA-vlan10] quit
[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] ip address 10.1.1.1 24
[SwitchA] vlan 30
[SwitchA-vlan30] port ten-gigabitethernet 1/0/2
[SwitchA-vlan30] quit
[SwitchA] interface vlan-interface 30
[SwitchA-Vlan-interface30] ip address 30.1.1.1 24
[SwitchA-Vlan-interface30] quit
[SwitchA] interface loopback 0
[SwitchA-LoopBack0] ip address 1.1.1.1 32
[SwitchA-LoopBack0] quit
(2) 配置OSPF协议,以保证各交换机之间路由可达
# 配置Switch A。
[SwitchA] ospf
[SwitchA-ospf-1] area 0
[SwitchA-ospf-1-area-0.0.0.0] network 1.1.1.1 0.0.0.0
[SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 30.1.1.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# 配置Switch B。
[SwitchB] ospf
[SwitchB-ospf-1] area 0
[SwitchB-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0
[SwitchB-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] quit
[SwitchB-ospf-1] quit
# 配置Switch C。
[SwitchC] ospf
[SwitchC-ospf-1] area 0
[SwitchC-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0
[SwitchC-ospf-1-area-0.0.0.0] network 30.1.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.0] network 40.1.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.0] quit
[SwitchC-ospf-1] quit
# 配置Switch D。
[SwitchD] ospf
[SwitchD-ospf-1] area 0
[SwitchD-ospf-1-area-0.0.0.0] network 4.4.4.4 0.0.0.0
[SwitchD-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.0] network 40.1.1.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.0] quit
[SwitchD-ospf-1] quit
# 配置完成后,在各交换机上执行display ip routing-table命令,可以看到相互之间都学到了对方的主机路由,包括Loopback接口对应的主机路由。以Switch A为例:
[SwitchA] display ip routing-table
Destinations : 26 Routes : 26
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
1.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
2.2.2.2/32 OSPF 10 1 10.1.1.2 Vlan10
3.3.3.3/32 OSPF 10 1 30.1.1.3 Vlan30
4.4.4.4/32 OSPF 10 2 10.1.1.2 Vlan10
8.1.1.0/24 Direct 0 0 8.1.1.1 Tun2
8.1.1.0/32 Direct 0 0 8.1.1.1 Tun2
8.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
8.1.1.255/32 Direct 0 0 8.1.1.1 Tun2
10.1.1.0/24 Direct 0 0 10.1.1.1 Vlan10
10.1.1.0/32 Direct 0 0 10.1.1.1 Vlan10
10.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
10.1.1.255/32 Direct 0 0 10.1.1.1 Vlan10
20.1.1.0/24 OSPF 10 2 10.1.1.2 Vlan10
30.1.1.0/24 Direct 0 0 30.1.1.1 Vlan30
30.1.1.0/32 Direct 0 0 30.1.1.1 Vlan30
30.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
30.1.1.255/32 Direct 0 0 30.1.1.1 Vlan30
40.1.1.0/24 Static 1 0 0.0.0.0 Tun2
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
(3) 配置LSR ID,开启MPLS、MPLS TE和RSVP-TE能力
# 配置Switch A。
[SwitchA] mpls lsr-id 1.1.1.1
[SwitchA] mpls te
[SwitchA-te] quit
[SwitchA] rsvp
[SwitchA-rsvp] quit
[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] mpls enable
[SwitchA-Vlan-interface10] mpls te enable
[SwitchA-Vlan-interface10] rsvp enable
[SwitchA-Vlan-interface10] quit
[SwitchA] interface vlan-interface 30
[SwitchA-Vlan-interface30] mpls enable
[SwitchA-Vlan-interface30] mpls te enable
[SwitchA-Vlan-interface30] rsvp enable
[SwitchA-Vlan-interface30] quit
# 配置Switch B。
[SwitchB] mpls lsr-id 2.2.2.2
[SwitchB] mpls te
[SwitchB-te] quit
[SwitchB] rsvp
[SwitchB-rsvp] quit
[SwitchB] interface vlan-interface 10
[SwitchB-Vlan-interface10] mpls enable
[SwitchB-Vlan-interface10] mpls te enable
[SwitchB-Vlan-interface10] rsvp enable
[SwitchB-Vlan-interface10] quit
[SwitchB] interface vlan-interface 20
[SwitchB-Vlan-interface20] mpls enable
[SwitchB-Vlan-interface20] mpls te enable
[SwitchB-Vlan-interface20] rsvp enable
[SwitchB-Vlan-interface20] quit
# 配置Switch C。
[SwitchC] mpls lsr-id 3.3.3.3
[SwitchC] mpls te
[SwitchC-te] quit
[SwitchC] rsvp
[SwitchC-rsvp] quit
[SwitchC] interface vlan-interface 30
[SwitchC-Vlan-interface30] mpls enable
[SwitchC-Vlan-interface30] mpls te enable
[SwitchC-Vlan-interface30] rsvp enable
[SwitchC-Vlan-interface30] quit
[SwitchC] interface vlan-interface 40
[SwitchC-Vlan-interface40] mpls enable
[SwitchC-Vlan-interface40] mpls te enable
[SwitchC-Vlan-interface40] rsvp enable
[SwitchC-Vlan-interface40] quit
# 配置Switch D。
[SwitchD] mpls lsr-id 4.4.4.4
[SwitchD] mpls te
[SwitchD-te] quit
[SwitchD] rsvp
[SwitchD-rsvp] quit
[SwitchD] interface vlan-interface 20
[SwitchD-Vlan-interface20] mpls enable
[SwitchD-Vlan-interface20] mpls te enable
[SwitchD-Vlan-interface20] rsvp enable
[SwitchD-Vlan-interface20] quit
[SwitchD] interface vlan-interface 40
[SwitchD-Vlan-interface40] mpls enable
[SwitchD-Vlan-interface40] mpls te enable
[SwitchD-Vlan-interface40] rsvp enable
[SwitchD-Vlan-interface40] quit
(4) 配置链路的MPLS TE属性
# 在Switch A上配置链路的最大带宽和最大可预留带宽。
[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] mpls te max-link-bandwidth 50000
[SwitchA-Vlan-interface10] mpls te max-reservable-bandwidth 40000
[SwitchA-Vlan-interface10] quit
[SwitchA] interface vlan-interface 30
[SwitchA-Vlan-interface30] mpls te max-link-bandwidth 50000
[SwitchA-Vlan-interface30] mpls te max-reservable-bandwidth 40000
[SwitchA-Vlan-interface30] quit
# 在Switch B上配置链路的最大带宽和最大可预留带宽。
[SwitchB] interface vlan-interface 10
[SwitchB-Vlan-interface10] mpls te max-link-bandwidth 50000
[SwitchB-Vlan-interface10] mpls te max-reservable-bandwidth 40000
[SwitchB-Vlan-interface10] quit
[SwitchB] interface vlan-interface 20
[SwitchB-Vlan-interface20] mpls te max-link-bandwidth 50000
[SwitchB-Vlan-interface20] mpls te max-reservable-bandwidth 40000
[SwitchB-Vlan-interface20] quit
# 在Switch C上配置链路的最大带宽和最大可预留带宽。
[SwitchC] interface vlan-interface 30
[SwitchC-Vlan-interface30] mpls te max-link-bandwidth 50000
[SwitchC-Vlan-interface30] mpls te max-reservable-bandwidth 40000
[SwitchC-Vlan-interface30] quit
[SwitchC] interface vlan-interface 40
[SwitchC-Vlan-interface40] mpls te max-link-bandwidth 50000
[SwitchC-Vlan-interface40] mpls te max-reservable-bandwidth 40000
[SwitchC-Vlan-interface40] quit
# 在Switch D上配置链路的最大带宽和最大可预留带宽。
[SwitchD] interface vlan-interface 20
[SwitchD-Vlan-interface20] mpls te max-link-bandwidth 50000
[SwitchD-Vlan-interface20] mpls te max-reservable-bandwidth 40000
[SwitchD-Vlan-interface20] quit
[SwitchD] interface vlan-interface 40
[SwitchD-Vlan-interface40] mpls te max-link-bandwidth 50000
[SwitchD-Vlan-interface40] mpls te max-reservable-bandwidth 40000
[SwitchD-Vlan-interface40] quit
(5) 配置OSPF TE,发布链路的MPLS TE属性
# 在Switch A上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchA] ospf
[SwitchA-ospf-1] opaque-capability enable
[SwitchA-ospf-1] area 0
[SwitchA-ospf-1-area-0.0.0.0] mpls te enable
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# 在Switch B上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchB] ospf
[SwitchB-ospf-1] opaque-capability enable
[SwitchB-ospf-1] area 0
[SwitchB-ospf-1-area-0.0.0.0] mpls te enable
[SwitchB-ospf-1-area-0.0.0.0] quit
[SwitchB-ospf-1] quit
# 在Switch C上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchC] ospf
[SwitchC-ospf-1] opaque-capability enable
[SwitchC-ospf-1] area 0
[SwitchC-ospf-1-area-0.0.0.0] mpls te enable
[SwitchC-ospf-1-area-0.0.0.0] quit
[SwitchC-ospf-1] quit
# 在Switch D上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchD] ospf
[SwitchD-ospf-1] opaque-capability enable
[SwitchD-ospf-1] area 0
[SwitchD-ospf-1-area-0.0.0.0] mpls te enable
[SwitchD-ospf-1-area-0.0.0.0] quit
[SwitchD-ospf-1] quit
(6) 配置MPLS TE隧道
# 在Switch A上配置MPLS TE隧道Tunnel1,用于传输企业A的数据:目的地址为Switch D的LSR ID(4.4.4.4);采用RSVP-TE信令协议建立MPLS TE隧道;隧道所需的带宽为20000kbps;开启路由记录功能。
[SwitchA] interface tunnel 1 mode mpls-te
[SwitchA-Tunnel1] ip address 7.1.1.1 255.255.255.0
[SwitchA-Tunnel1] destination 4.4.4.4
[SwitchA-Tunnel1] mpls te signaling rsvp-te
[SwitchA-Tunnel1] mpls te bandwidth 20000
[SwitchA-Tunnel1] mpls te record-route
[SwitchA-Tunnel1] quit
# 在Switch A上配置MPLS TE隧道Tunnel2,用于传输企业B的数据:目的地址为Switch D的LSR ID(4.4.4.4);采用RSVP-TE信令协议建立MPLS TE隧道;隧道所需的带宽为30000kbps;开启路由记录功能。
[SwitchA] interface tunnel 2 mode mpls-te
[SwitchA-Tunnel2] ip address 8.1.1.1 255.255.255.0
[SwitchA-Tunnel2] destination 4.4.4.4
[SwitchA-Tunnel2] mpls te signaling rsvp-te
[SwitchA-Tunnel2] mpls te bandwidth 30000
[SwitchA-Tunnel2] mpls te record-route
[SwitchA-Tunnel2] quit
(7) 配置静态路由使流量沿MPLS TE隧道转发
# 在Switch A上配置静态路由,使得到达网络20.1.1.0/24的流量通过MPLS TE隧道接口Tunnel1转发。
[SwitchA] ip route-static 20.1.1.0 24 tunnel 1 preference 1
# 在Switch A上配置静态路由,使得到达网络40.1.1.0/24的流量通过MPLS TE隧道接口Tunnel2转发。
[SwitchA] ip route-static 40.1.1.0 24 tunnel 2 preference 1
# 配置完成后,在Switch A上执行display interface tunnel命令可以看到2个隧道接口的状态为UP。
[SwitchA] display interface tunnel
Tunnel1
Current state: UP
Line protocol state: UP
Description: Tunnel1 Interface
Bandwidth: 64kbps
Maximum Transmit Unit: 64000
Internet Address is 7.1.1.1/24 Primary
Tunnel source unknown, destination 4.4.4.4
Tunnel TTL 255
Tunnel protocol/transport CR_LSP
Last clearing of counters: Never
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
Tunnel2
Current state: UP
Line protocol state: UP
Description: Tunnel2 Interface
Bandwidth: 64kbps
Maximum Transmit Unit: 64000
Internet Address is 8.1.1.1/24 Primary
Tunnel source unknown, destination 4.4.4.4
Tunnel TTL 255
Tunnel protocol/transport CR_LSP
Last clearing of counters: Never
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
# 在Switch A上执行display mpls te tunnel-interface命令可以看到2条隧道的详细信息。
[SwitchA] display mpls te tunnel-interface
Tunnel Name : Tunnel 1
Tunnel State : Up (Main CRLSP up, Shared-resource CRLSP down)
Tunnel Attributes :
LSP ID : 27415 Tunnel ID : 1
Admin State : Normal
Ingress LSR ID : 1.1.1.1 Egress LSR ID : 4.4.4.4
Signaling : RSVP-TE Static CRLSP Name : -
Resv Style : SE
Tunnel mode : -
Reverse-LSP name : -
Reverse-LSP LSR ID : - Reverse-LSP Tunnel ID: -
Class Type : CT0 Tunnel Bandwidth : 20000 kbps
Reserved Bandwidth : 20000 kbps
Setup Priority : 7 Holding Priority : 7
Affinity Attr/Mask : 0/0
Explicit Path : -
Backup Explicit Path : -
Metric Type : TE
Record Route : Enabled Record Label : Disabled
FRR Flag : Disabled Bandwidth Protection : Disabled
Backup Bandwidth Flag: Disabled Backup Bandwidth Type: -
Backup Bandwidth : -
Bypass Tunnel : No Auto Created : No
Route Pinning : Disabled
Retry Limit : 3 Retry Interval : 2 sec
Reoptimization : Disabled Reoptimization Freq : -
Backup Type : None Backup LSP ID : -
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
Tunnel Name : Tunnel 2
Tunnel State : Up (Main CRLSP up, Shared-resource CRLSP down)
Tunnel Attributes :
LSP ID : 27302 Tunnel ID : 2
Admin State : Normal
Ingress LSR ID : 1.1.1.1 Egress LSR ID : 4.4.4.4
Signaling : RSVP-TE Static CRLSP Name : -
Resv Style : SE
Tunnel mode : -
Reverse-LSP name : -
Reverse-LSP LSR ID : - Reverse-LSP Tunnel ID: -
Class Type : CT0 Tunnel Bandwidth : 30000 kbps
Reserved Bandwidth : 30000 kbps
Setup Priority : 7 Holding Priority : 7
Affinity Attr/Mask : 0/0
Explicit Path : -
Backup Explicit Path : -
Metric Type : TE
Record Route : Enabled Record Label : Disabled
FRR Flag : Disabled Bandwidth Protection : Disabled
Backup Bandwidth Flag: Disabled Backup Bandwidth Type: -
Backup Bandwidth : -
Bypass Tunnel : No Auto Created : No
Route Pinning : Disabled
Retry Limit : 3 Retry Interval : 2 sec
Reoptimization : Disabled Reoptimization Freq : -
Backup Type : None Backup LSP ID : -
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
# 在Switch A上执行display ip routing-table命令,可以看到路由表中有以Tunnel1和Tunnel2为出接口的静态路由信息。
[SwitchA] display ip routing-table
Destinations : 30 Routes : 31
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
1.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
2.2.2.2/32 OSPF 10 1 10.1.1.2 Vlan10
3.3.3.3/32 OSPF 10 1 30.1.1.3 Vlan30
4.4.4.4/32 OSPF 10 2 10.1.1.2 Vlan10
30.1.1.3 Vlan30
7.1.1.0/24 Direct 0 0 7.1.1.1 Tun1
7.1.1.0/32 Direct 0 0 7.1.1.1 Tun1
7.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
7.1.1.255/32 Direct 0 0 7.1.1.1 Tun1
8.1.1.0/24 Direct 0 0 8.1.1.1 Tun2
8.1.1.0/32 Direct 0 0 8.1.1.1 Tun2
8.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
8.1.1.255/32 Direct 0 0 8.1.1.1 Tun2
10.1.1.0/24 Direct 0 0 10.1.1.1 Vlan10
10.1.1.0/32 Direct 0 0 10.1.1.1 Vlan10
10.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
10.1.1.255/32 Direct 0 0 10.1.1.1 Vlan10
20.1.1.0/24 Static 1 0 0.0.0.0 Tun1
30.1.1.0/24 Direct 0 0 30.1.1.1 Vlan30
30.1.1.0/32 Direct 0 0 30.1.1.1 Vlan30
30.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
30.1.1.255/32 Direct 0 0 30.1.1.1 Vlan30
40.1.1.0/24 Static 1 0 0.0.0.0 Tun2
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
# 在Switch A上执行display rsvp lsp verbose命令,可以看到Tunnel 1的CRLSP使用了Switch A—Switch B—Switch D的路径;Tunnel 2的CRLSP使用了Switch A—Switch C—Switch D的路径。
[SwitchA] display rsvp lsp verbose
Tunnel name: Tunnel1
Destination: 4.4.4.4 Source: 1.1.1.1
Tunnel ID: 1 LSP ID: 27415
LSR type: Ingress Direction: Unidirectional
Setup priority: 7 Holding priority: 7
In-Label: - Out-Label: 1146
In-Interface: - Out-Interface: Vlan10
Nexthop: 10.1.1.2 Exclude-any: 0
Include-Any: 0 Include-all: 0
Mean rate (CIR): 20000 kbps Mean burst size (CBS): 1000.00 bytes
Path MTU: 1500 Class type: CT0
RRO number: 6
10.1.1.1/32 Flag: 0x00 (No FRR)
10.1.1.2/32 Flag: 0x00 (No FRR)
2.2.2.2/32 Flag: 0x20 (No FRR/Node-ID)
20.1.1.2/32 Flag: 0x00 (No FRR)
20.1.1.4/32 Flag: 0x00 (No FRR)
4.4.4.4/32 Flag: 0x20 (No FRR/Node-ID)
Fast Reroute protection: None
Tunnel name: Tunnel2
Destination: 4.4.4.4 Source: 1.1.1.1
Tunnel ID: 2 LSP ID: 27302
LSR type: Ingress Direction: Unidirectional
Setup priority: 7 Holding priority: 7
In-Label: - Out-Label: 1150
In-Interface: - Out-Interface: Vlan30
Nexthop: 30.1.1.3 Exclude-any: 0
Include-Any: 0 Include-all: 0
Mean rate (CIR): 30000 kbps Mean burst size (CBS): 1000.00 bytes
Path MTU: 1500 Class type: CT0
RRO number: 6
30.1.1.1/32 Flag: 0x00 (No FRR)
30.1.1.3/32 Flag: 0x00 (No FRR)
3.3.3.3/32 Flag: 0x20 (No FRR/Node-ID)
40.1.1.3/32 Flag: 0x00 (No FRR)
40.1.1.4/32 Flag: 0x00 (No FRR)
4.4.4.4/32 Flag: 0x20 (No FRR/Node-ID)
Fast Reroute protection: None
经过验证,可以看到通过部署RSVP-TE服务,自动为两个用户分别建立了两条CRLSP:经过Switch A—Switch B—Switch D的带宽为20000kbps的CRLSP和经过Switch A—Switch C—Switch D的带宽为30000kbps的CRLSP。
· Switch A
#
ospf 1
area 0.0.0.0
network 1.1.1.1 0.0.0.0
network 10.1.1.0 0.0.0.255
network 30.1.1.0 0.0.0.255
mpls te enable
#
mpls lsr-id 1.1.1.1
#
vlan 10
#
vlan 30
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
#
interface Vlan-interface10
ip address 10.1.1.1 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Vlan-interface30
ip address 30.1.1.1 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 10
#
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port access vlan 30
#
interface Tunnel1 mode mpls-te
ip address 7.1.1.1 255.255.255.0
mpls te bandwidth ct0 20000
mpls te record-route
destination 4.4.4.4
#
interface Tunnel2 mode mpls-te
ip address 8.1.1.1 255.255.255.0
mpls te bandwidth ct0 30000
mpls te record-route
destination 4.4.4.4
#
ip route-static 20.1.1.0 24 Tunnel1 preference 1
ip route-static 40.1.1.0 24 Tunnel2 preference 1
#
· Switch B
#
ospf 1
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 10.1.1.0 0.0.0.255
network 20.1.1.0 0.0.0.255
mpls te enable
#
mpls lsr-id 2.2.2.2
#
vlan 10
#
vlan 20
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
#
interface Vlan-interface10
ip address 10.1.1.2 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Vlan-interface20
ip address 20.1.1.2 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 10
#
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port access vlan 20
#
· Switch C
#
ospf 1
area 0.0.0.0
network 3.3.3.3 0.0.0.0
network 30.1.1.0 0.0.0.255
network 40.1.1.0 0.0.0.255
mpls te enable
#
mpls lsr-id 3.3.3.3
#
vlan 30
#
vlan 40
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.0
#
interface Vlan-interface30
ip address 30.1.1.3 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Vlan-interface40
ip address 40.1.1.3 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 40
#
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port access vlan 30
#
· Switch D
#
ospf 1
area 0.0.0.0
network 4.4.4.4 0.0.0.0
network 20.1.1.0 0.0.0.255
network 40.1.1.0 0.0.0.255
mpls te enable
#
mpls lsr-id 4.4.4.4
#
vlan 20
#
vlan 40
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.255
#
interface Vlan-interface20
ip address 20.1.1.4 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Vlan-interface40
ip address 40.1.1.4 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 40
#
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port access vlan 20
#
如图4所示,Switch A->Switch B->Switch C->Switch D之间建立了一条CRLSP,承载着某公司的语音业务。由于Switch B和Switch C两台设备相隔较远,中间连有多台二层交换机,链路不太稳定,可能会发生故障,现要求使用MPLS TE FRR功能对Switch B->Switch C这段链路进行保护,当链路出现故障时,能快速切换到Bypass CRLSP(Switch A->Switch B->Switch E->Switch C->Switch D)。(假设Primary隧道和Bypass隧道的所需带宽均为30000kbps;每条链路的最大带宽为50000kbps,最大可预留带宽为40000kbps)
图4 MPLS TE FRR典型配置举例组网图
· 为建立主备CRLSP,需要在各Switch上使能MPLS、MPLS TE和RSVP-TE基本能力。
· 由于组网需求中已经明确主CRLSP的路径和Bypass CRLSP的路径,需要通过显式路径的方式指定MPLS TE的主CRLSP和Bypass CRLSP。
· 为实现被保护的主CRLSP链路发生故障后,PLR能快速感知到,需要在主CRLSP保护链路两端的节点上(Switch B和Switch C)配置BFD联动RSVP-TE,使BFD能够快速检测并通告RSVP-TE协议,以便将流量快速切换到Bypass隧道。
· 为实现当BFD检测到被保护链路故障后,主CRLSP上的流量能快速切换到Bypass CRLSP,需在主CRLSP的Ingress节点上使能MPLS TE FRR功能。
· 为了保证主CRLSP链路故障时,MPLS TE能在多条Bypass隧道可能同时并存的情况下,选择出最优的Bypass隧道,需要在PLR节点上配置FRR的Bypass隧道的优选时间间隔为5秒(缺省为300秒)。
本举例是在S12500-S-CMW710-R7150P02版本上进行配置和验证的。
· 进行本案例配置之前,需要先全局关闭STP功能,或为每个VLAN映射一个MSTP实例,否则可能会阻断环路中的一条链路。
· 只有使用RSVP-TE信令协议建立的MPLS TE隧道支持FRR功能。
· 不要在同一个接口同时配置快速重路由功能和RSVP认证功能。
· 由于FRR使用的Bypass隧道需要预先建立,占用额外的带宽,因此,在网络带宽余量不多的情况下,应该只对关键的接口或链路进行快速重路由保护。
· 用户在配置时应保证Bypass隧道的带宽不小于被保护的所有主CRLSP所需带宽之和,否则可能导致部分主CRLSP不能被Bypass隧道保护。
· Bypass隧道一般不转发数据。如果Bypass隧道在保护主CRLSP的同时转发流量,需要为Bypass隧道提供足够的带宽。
· Bypass隧道不能作为VPN等业务的承载隧道。
· 不能为Bypass隧道配置快速重路由功能。也就是说,Bypass隧道不能同时作为主CRLSP被其他Bypass隧道保护,隧道不能被嵌套保护。
· Bypass隧道不能经过被保护的接口或节点。
· 不要求带宽保护的主CRLSP和提供保护带宽的Bypass隧道绑定成功后,主CRLSP占用Bypass隧道的保护带宽。提供带宽保护的Bypass隧道的保护带宽先到先得,需要带宽保护的主CRLSP并不能抢占不需要带宽保护的主CRLSP。
· 发生FRR切换后,如果修改Bypass隧道的保护带宽,使得保护带宽类型不同、保护带宽不够或者引起FRR保护类型(是否为主CRLSP提供带宽保护)变化,都将导致主CRLSP Down。
(1) 配置各接口的IP地址
# 按照图4配置各接口的IP地址和掩码,包括LoopBack接口,下面以Switch A为例,其它设备配置方法类似,具体配置过程略。
<SwitchA> system-view
[SwitchA] vlan 2
[SwitchA-vlan2] port ten-gigabitethernet 1/0/1
[SwitchA-vlan2] quit
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] ip address 2.1.1.1 24
[SwitchA] interface loopback 0
[SwitchA-LoopBack0] ip address 1.1.1.1 32
[SwitchA-LoopBack0] quit
(2) 配置OSPF协议,以保证各交换机之间路由可达
# 配置Switch A。
[SwitchA] ospf
[SwitchA-ospf-1] area 0
[SwitchA-ospf-1-area-0.0.0.0] network 1.1.1.1 0.0.0.0
[SwitchA-ospf-1-area-0.0.0.0] network 2.1.1.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# 配置Switch B。
[SwitchB] ospf
[SwitchB-ospf-1] area 0
[SwitchB-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0
[SwitchB-ospf-1-area-0.0.0.0] network 2.1.1.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 3.1.1.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 3.2.1.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] quit
[SwitchB-ospf-1] quit
# 配置Switch C。
[SwitchC] ospf
[SwitchC-ospf-1] area 0
[SwitchC-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0
[SwitchC-ospf-1-area-0.0.0.0] network 3.1.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.0] network 3.3.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.0] network 4.1.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.0] quit
[SwitchC-ospf-1] quit
# 配置Switch D。
[SwitchD] ospf
[SwitchD-ospf-1] area 0
[SwitchD-ospf-1-area-0.0.0.0] network 4.4.4.4 0.0.0.0
[SwitchD-ospf-1-area-0.0.0.0] network 4.1.1.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.0] quit
[SwitchD-ospf-1] quit
# 配置Switch E。
[SwitchE] ospf
[SwitchE-ospf-1] area 0
[SwitchE-ospf-1-area-0.0.0.0] network 5.5.5.5 0.0.0.0
[SwitchE-ospf-1-area-0.0.0.0] network 3.2.1.0 0.0.0.255
[SwitchE-ospf-1-area-0.0.0.0] network 3.3.1.0 0.0.0.255
[SwitchE-ospf-1-area-0.0.0.0] quit
[SwitchE-ospf-1] quit
# 配置完成后,在各交换机上执行display ip routing-table命令,可以看到相互之间都学到了对方的主机路由,包括Loopback接口对应的主机路由。以Switch A为例:
[SwitchA] display ip routing-table
Destinations : 21 Routes : 21
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
1.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
2.1.1.0/24 Direct 0 0 2.1.1.1 Vlan2
2.1.1.0/32 Direct 0 0 2.1.1.1 Vlan2
2.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
2.1.1.255/32 Direct 0 0 2.1.1.1 Vlan2
2.2.2.2/32 OSPF 10 1 2.1.1.2 Vlan2
3.1.1.0/24 OSPF 10 2 2.1.1.2 Vlan2
3.2.1.0/24 OSPF 10 2 2.1.1.2 Vlan2
3.3.1.0/24 OSPF 10 3 2.1.1.2 Vlan2
3.3.3.3/32 OSPF 10 2 2.1.1.2 Vlan2
4.1.1.0/24 OSPF 10 3 2.1.1.2 Vlan2
4.4.4.4/32 OSPF 10 3 2.1.1.2 Vlan2
5.5.5.5/32 OSPF 10 2 2.1.1.2 Vlan2
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
(3) 配置LSR ID,开启MPLS、MPLS TE和RSVP-TE能力,并在Switch B和Switch C上配置RSVP-TE与BFD联动,以检测Switch B和Switch C之间链路的状态
# 配置Switch A
[SwitchA] mpls lsr-id 1.1.1.1
[SwitchA] mpls te
[SwitchA-te] quit
[SwitchA] rsvp
[SwitchA-rsvp] quit
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] mpls enable
[SwitchA-Vlan-interface2] mpls te enable
[SwitchA-Vlan-interface2] rsvp enable
[SwitchA-Vlan-interface2] quit
# 配置Switch B。
[SwitchB] mpls lsr-id 2.2.2.2
[SwitchB] mpls te
[SwitchB-te] quit
[SwitchB] rsvp
[SwitchB-rsvp] quit
[SwitchB] interface vlan-interface 2
[SwitchB-Vlan-interface2] mpls enable
[SwitchB-Vlan-interface2] mpls te enable
[SwitchB-Vlan-interface2] rsvp enable
[SwitchB-Vlan-interface2] quit
[SwitchB] interface vlan-interface 3
[SwitchB-Vlan-interface3] mpls enable
[SwitchB-Vlan-interface3] mpls te enable
[SwitchB-Vlan-interface3] rsvp enable
[SwitchB-Vlan-interface3] rsvp bfd enable
[SwitchB-Vlan-interface3] quit
[SwitchB] interface vlan-interface 5
[SwitchB-Vlan-interface5] mpls enable
[SwitchB-Vlan-interface5] mpls te enable
[SwitchB-Vlan-interface5] rsvp enable
[SwitchB-Vlan-interface5] quit
# 配置Switch C。
[SwitchC] mpls lsr-id 3.3.3.3
[SwitchC] mpls te
[SwitchC-te] quit
[SwitchC] rsvp
[SwitchC-rsvp] quit
[SwitchC] interface vlan-interface 3
[SwitchC-Vlan-interface3] mpls enable
[SwitchC-Vlan-interface3] mpls te enable
[SwitchC-Vlan-interface3] rsvp enable
[SwitchC-Vlan-interface3] quit
[SwitchC] interface vlan-interface 4
[SwitchC-Vlan-interface4] mpls enable
[SwitchC-Vlan-interface4] mpls te enable
[SwitchC-Vlan-interface4] rsvp enable
[SwitchC-Vlan-interface4] rsvp bfd enable
[SwitchC-Vlan-interface4] quit
[SwitchC] interface vlan-interface 6
[SwitchC-Vlan-interface6] mpls enable
[SwitchC-Vlan-interface6] mpls te enable
[SwitchC-Vlan-interface6] rsvp enable
[SwitchC-Vlan-interface6] quit
# 配置Switch D。
[SwitchD] mpls lsr-id 4.4.4.4
[SwitchD] mpls te
[SwitchD-te] quit
[SwitchD] rsvp
[SwitchD-rsvp] quit
[SwitchD] interface vlan-interface 4
[SwitchD-Vlan-interface4] mpls enable
[SwitchD-Vlan-interface4] mpls te enable
[SwitchD-Vlan-interface4] rsvp enable
[SwitchD-Vlan-interface4] quit
# 配置Switch E。
[SwitchE] mpls lsr-id 5.5.5.5
[SwitchE] mpls te
[SwitchE-te] quit
[SwitchE] rsvp
[SwitchE-rsvp] quit
[SwitchE] interface vlan-interface 5
[SwitchE-Vlan-interface5] mpls enable
[SwitchE-Vlan-interface5] mpls te enable
[SwitchE-Vlan-interface5] rsvp enable
[SwitchE-Vlan-interface5] quit
[SwitchE] interface vlan-interface 6
[SwitchE-Vlan-interface6] mpls enable
[SwitchE-Vlan-interface6] mpls te enable
[SwitchE-Vlan-interface6] rsvp enable
[SwitchE-Vlan-interface6] quit
(4) 配置链路的MPLS TE属性
# 在Switch A上配置链路的最大带宽和最大可预留带宽。
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] mpls te max-link-bandwidth 50000
[SwitchA-Vlan-interface2] mpls te max-reservable-bandwidth 40000
[SwitchA-Vlan-interface2] quit
# 在Switch B上配置链路的最大带宽和最大可预留带宽。
[SwitchB] interface vlan-interface 2
[SwitchB-Vlan-interface2] mpls te max-link-bandwidth 50000
[SwitchB-Vlan-interface2] mpls te max-reservable-bandwidth 40000
[SwitchB-Vlan-interface2] quit
[SwitchB] interface vlan-interface 3
[SwitchB-Vlan-interface3] mpls te max-link-bandwidth 50000
[SwitchB-Vlan-interface3] mpls te max-reservable-bandwidth 40000
[SwitchB-Vlan-interface3] quit
[SwitchB] interface vlan-interface 5
[SwitchB-Vlan-interface5] mpls te max-link-bandwidth 50000
[SwitchB-Vlan-interface5] mpls te max-reservable-bandwidth 40000
[SwitchB-Vlan-interface5] quit
# 在Switch C上配置链路的最大带宽和最大可预留带宽。
[SwitchC] interface vlan-interface 3
[SwitchC-Vlan-interface3] mpls te max-link-bandwidth 50000
[SwitchC-Vlan-interface3] mpls te max-reservable-bandwidth 40000
[SwitchC-Vlan-interface3] quit
[SwitchC] interface vlan-interface 4
[SwitchC-Vlan-interface4] mpls te max-link-bandwidth 50000
[SwitchC-Vlan-interface4] mpls te max-reservable-bandwidth 40000
[SwitchC-Vlan-interface4] quit
[SwitchC] interface vlan-interface 6
[SwitchC-Vlan-interface6] mpls te max-link-bandwidth 50000
[SwitchC-Vlan-interface6] mpls te max-reservable-bandwidth 40000
[SwitchC-Vlan-interface6] quit
# 在Switch D上配置链路的最大带宽和最大可预留带宽。
[SwitchD] interface vlan-interface 4
[SwitchD-Vlan-interface4] mpls te max-link-bandwidth 50000
[SwitchD-Vlan-interface4] mpls te max-reservable-bandwidth 40000
[SwitchD-Vlan-interface4] quit
# 在Switch E上配置链路的最大带宽和最大可预留带宽。
[SwitchE] interface vlan-interface 5
[SwitchE-Vlan-interface5] mpls te max-link-bandwidth 50000
[SwitchE-Vlan-interface5] mpls te max-reservable-bandwidth 40000
[SwitchE-Vlan-interface5] quit
[SwitchE] interface vlan-interface 6
[SwitchE-Vlan-interface6] mpls te max-link-bandwidth 50000
[SwitchE-Vlan-interface6] mpls te max-reservable-bandwidth 40000
[SwitchE-Vlan-interface6] quit
(5) 配置OSPF TE,发布链路的MPLS TE属性
# Switch A上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchA] ospf
[SwitchA-ospf-1] opaque-capability enable
[SwitchA-ospf-1] area 0
[SwitchA-ospf-1-area-0.0.0.0] mpls te enable
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# Switch B上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchB] ospf
[SwitchB-ospf-1] opaque-capability enable
[SwitchB-ospf-1] area 0
[SwitchB-ospf-1-area-0.0.0.0] mpls te enable
[SwitchB-ospf-1-area-0.0.0.0] quit
[SwitchB-ospf-1] quit
# Switch C上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchC] ospf
[SwitchC-ospf-1] opaque-capability enable
[SwitchC-ospf-1] area 0
[SwitchC-ospf-1-area-0.0.0.0] mpls te enable
[SwitchC-ospf-1-area-0.0.0.0] quit
[SwitchC-ospf-1] quit
# Switch D上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchD] ospf
[SwitchD-ospf-1] opaque-capability enable
[SwitchD-ospf-1] area 0
[SwitchD-ospf-1-area-0.0.0.0] mpls te enable
[SwitchD-ospf-1-area-0.0.0.0] quit
[SwitchD-ospf-1] quit
# Switch E上使能OSPF的Opaque LSA发布接收能力(缺省情况下处于开启状态),并在OSPF区域0内使能MPLS TE能力。
[SwitchE] ospf
[SwitchE-ospf-1] opaque-capability enable
[SwitchE-ospf-1] area 0
[SwitchE-ospf-1-area-0.0.0.0] mpls te enable
[SwitchE-ospf-1-area-0.0.0.0] quit
[SwitchE-ospf-1] quit
(6) 在主CRLSP的Ingress节点Switch A上建立MPLS TE隧道
# 配置主CRLSP的显式路径,缺省采用严格下一跳方式。
[SwitchA] explicit-path pri-path
[SwitchA-explicit-path-pri-path] nexthop 2.1.1.2
[SwitchA-explicit-path-pri-path] nexthop 3.1.1.3
[SwitchA-explicit-path-pri-path] nexthop 4.1.1.4
[SwitchA-explicit-path-pri-path] nexthop 4.4.4.4
[SwitchA-explicit-path-pri-path] quit
# 配置主CRLSP的MPLS TE隧道Tunnel4:目的地址为Switch D的LSR ID(4.4.4.4);采用RSVP-TE信令协议建立MPLS TE隧道;隧道所需带宽为30000kbps;隧道引用显式路径pri-path。
[SwitchA] interface tunnel4 mode mpls-te
[SwitchA-Tunnel4] ip address 10.1.1.1 255.255.255.0
[SwitchA-Tunnel4] destination 4.4.4.4
[SwitchA-Tunnel4] mpls te signaling rsvp-te
[SwitchA-Tunnel4] mpls te bandwidth 30000
[SwitchA-Tunnel4] mpls te path preference 1 explicit-path pri-path
# 开启MPLS TE隧道的FRR功能。
[SwitchA-Tunnel4] mpls te fast-reroute
[SwitchA-Tunnel4] quit
# 配置完成后,在Switch A上执行display interface tunnel命令,可以看到Tunnel4的状态为UP。
[SwitchA] display interface tunnel
Tunnel4
Current state: UP
Line protocol state: UP
Description: Tunnel4 Interface
Bandwidth: 64kbps
Maximum Transmit Unit: 64000
Internet Address is 10.1.1.1/24 Primary
Tunnel source unknown, destination 4.4.4.4
Tunnel TTL 255
Tunnel protocol/transport CR_LSP
Last clearing of counters: Never
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
# 在Switch A上执行display mpls te tunnel-interface命令,可以看到隧道接口的详细信息。
[SwitchA] display mpls te tunnel-interface
Tunnel Name : Tunnel 4
Tunnel State : Up (Main CRLSP up, Shared-resource CRLSP down)
Tunnel Attributes :
LSP ID : 37325 Tunnel ID : 4
Admin State : Normal
Ingress LSR ID : 1.1.1.1 Egress LSR ID : 4.4.4.4
Signaling : RSVP-TE Static CRLSP Name : -
Resv Style : SE
Tunnel mode : -
Reverse-LSP name : -
Reverse-LSP LSR ID : - Reverse-LSP Tunnel ID: -
Class Type : CT0 Tunnel Bandwidth : 30000 kbps
Reserved Bandwidth : 30000 kbps
Setup Priority : 7 Holding Priority : 7
Affinity Attr/Mask : 0/0
Explicit Path : pri-path
Backup Explicit Path : -
Metric Type : TE
Record Route : Enabled Record Label : Enabled
FRR Flag : Enabled Bandwidth Protection : Disabled
Backup Bandwidth Flag: Disabled Backup Bandwidth Type: -
Backup Bandwidth : -
Bypass Tunnel : No Auto Created : No
Route Pinning : Disabled
Retry Limit : 3 Retry Interval : 2 sec
Reoptimization : Disabled Reoptimization Freq : -
Backup Type : None Backup LSP ID : -
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
(7) 在作为PLR的Switch B上配置Bypass隧道
# 配置Bypass隧道的显式路径。
[SwitchB] explicit-path by-path
[SwitchB-explicit-path-by-path] nexthop 3.2.1.5
[SwitchB-explicit-path-by-path] nexthop 3.3.1.3
[SwitchB-explicit-path-by-path] nexthop 3.3.3.3
[SwitchB-explicit-path-by-path] quit
# 配置Bypass隧道Tunnel5:目的地址为Switch C的LSR ID(3.3.3.3);采用RSVP-TE信令协议建立MPLS TE隧道;隧道所需带宽为30000kbps;隧道引用显式路径by-path。
[SwitchB] interface tunnel 5 mode mpls-te
[SwitchB-Tunnel5] ip address 11.1.1.1 255.255.255.0
[SwitchB-Tunnel5] destination 3.3.3.3
[SwitchB-Tunnel5] mpls te signaling rsvp-te
[SwitchA-Tunnel5] mpls te bandwidth 30000
[SwitchB-Tunnel5] mpls te path preference 1 explicit-path by-path
# 配置Bypass隧道不对所能保护的带宽总量进行限制,即不能提供带宽保护。
[SwitchB-Tunnel5] mpls te backup bandwidth un-limited
[SwitchB-Tunnel5] quit
# 将Bypass隧道绑定到被保护的接口。
[SwitchB] interface vlan-interface 3
[SwitchB-Vlan-interface3] mpls te fast-reroute bypass-tunnel tunnel 5
[SwitchB-Vlan-interface3] quit
# 配置完成后,在Switch B上执行display interface tunnel命令可以看到接口Tunnel5的状态为UP。
[SwitchB] display interface tunnel
Tunnel5
Current state: UP
Line protocol state: DOWN
Description: Tunnel5 Interface
Bandwidth: 64kbps
Maximum Transmit Unit: 64000
Internet Address is 11.1.1.1/24 Primary
Tunnel source unknown, destination 3.3.3.3
Tunnel TTL 255
Tunnel protocol/transport CR_LSP
Last clearing of counters: Never
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
(8) 配置静态路由使流量沿MPLS TE隧道转发
# 在Switch A上配置静态路由,使得到达网络4.1.1.0/24的流量通过MPLS TE隧道接口Tunnel4转发。
[SwitchA] ip route-static 4.1.1.0 24 tunnel 4 preference 1
# 在所有设备上执行display mpls lsp命令,可以看到LSP表项。在Switch B上存在两条LSP,通过Bypass隧道保护主CRLSP。
[SwitchA] display mpls lsp
FEC Proto In/Out Label Interface/Out NHLFE
1.1.1.1/4/37325 RSVP -/1150 Vlan2
2.1.1.2 Local -/- Vlan2
Tunnel4 Local -/- NHLFE1026
[SwitchB] display mpls lsp
FEC Proto In/Out Label Interface/Out NHLFE
1.1.1.1/4/37325 RSVP 1150/1147 Vlan3
Backup 1150/1147 Tun5
2.2.2.2/5/18928 RSVP -/1149 Vlan5
3.1.1.3 Local -/- Vlan3
3.2.1.5 Local -/- Vlan5
Tunnel5 Local -/- NHLFE1027
[SwitchC] display mpls lsp
FEC Proto In/Out Label Interface/Out NHLFE
1.1.1.1/4/37325 RSVP 1147/3 Vlan4
2.2.2.2/5/18928 RSVP 3/- -
4.1.1.4 Local -/- Vlan4
# 在PLR上shutdown被保护的出接口Vlan-interface 3。
[SwitchB] interface vlan-interface 3
[SwitchB-Vlan-interface3] shutdown
[SwitchB-Vlan-interface3] quit
# 在Switch A上执行display interface tunnel 4命令查看主CRLSP的状态,可以看到Tunnel接口仍然处于UP状态。
[SwitchA] display interface tunnel 4
Tunnel4
Current state: UP
Line protocol state: UP
Description: Tunnel4 Interface
Bandwidth: 64kbps
Maximum Transmit Unit: 64000
Internet Address is 10.1.1.1/24 Primary
Tunnel source unknown, destination 4.4.4.4
Tunnel TTL 255
Tunnel protocol/transport CR_LSP
Last clearing of counters: Never
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
# 在Switch A上执行display mpls te tunnel-interface命令,可以看到隧道接口的详细信息。
[SwitchA] display mpls te tunnel-interface
Tunnel Name : Tunnel 4
Tunnel State : Up (Main CRLSP up, Shared-resource CRLSP being set up)
Tunnel Attributes :
LSP ID : 37325 Tunnel ID : 4
Admin State : Normal
Ingress LSR ID : 1.1.1.1 Egress LSR ID : 4.4.4.4
Signaling : RSVP-TE Static CRLSP Name : -
Resv Style : SE
Tunnel mode : -
Reverse-LSP name : -
Reverse-LSP LSR ID : - Reverse-LSP Tunnel ID: -
Class Type : CT0 Tunnel Bandwidth : 30000 kbps
Reserved Bandwidth : 30000 kbps
Setup Priority : 7 Holding Priority : 7
Affinity Attr/Mask : 0/0
Explicit Path : pri-path
Backup Explicit Path : -
Metric Type : TE
Record Route : Enabled Record Label : Enabled
FRR Flag : Enabled Bandwidth Protection : Disabled
Backup Bandwidth Flag: Disabled Backup Bandwidth Type: -
Backup Bandwidth : -
Bypass Tunnel : No Auto Created : No
Route Pinning : Disabled
Retry Limit : 3 Retry Interval : 2 sec
Reoptimization : Disabled Reoptimization Freq : -
Backup Type : None Backup LSP ID : -
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
# 在Switch B上执行display mpls lsp命令,可以看到Bypass隧道被使用。
[SwitchB] display mpls lsp
FEC Proto In/Out Label Interface/Out NHLFE
1.1.1.1/4/37325 RSVP 1150/1147 Tun5
2.2.2.2/5/18928 RSVP -/1149 Vlan5
3.2.1.5 Local -/- Vlan5
Tunnel5 Local -/- NHLFE1027
# 在PLR上配置在多条旁路隧道中进行优选的时间间隔为5秒。
[SwitchB] mpls te
[SwitchB-te] fast-reroute timer 5
[SwitchB-te] quit
# 在PLR上undo shutdown被保护的出接口Vlan-interface 3。
[SwitchB] interface vlan-interface 3
[SwitchB-Vlan-interface3] undo shutdown
[SwitchB-Vlan-interface3] quit
# 在Switch A上执行display interface tunnel 4命令查看主CRLSP的状态,可以看到Tunnel接口处于up状态。
[SwitchA] display interface tunnel 4
Tunnel4
Current state: UP
Line protocol state: UP
Description: Tunnel4 Interface
Bandwidth: 64kbps
Maximum Transmit Unit: 64000
Internet Address is 10.1.1.1/24 Primary
Tunnel source unknown, destination 4.4.4.4
Tunnel TTL 255
Tunnel protocol/transport CR_LSP
Last clearing of counters: Never
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
# 等待约5秒钟后,在Switch B上执行display mpls lsp verbose命令,可以看到Tunnel5仍绑定到出接口Vlan-interface 3,但未被使用。
[SwitchB] display mpls lsp verbose
Destination : 4.4.4.4
FEC : 1.1.1.1/4/53319
Protocol : RSVP
LSR Type : Transit
Service : -
In-Label : 1150
Path ID : 0x540000003.1
State : Active
Out-Label : 1150
Nexthop : 3.1.1.3
Out-Interface: Vlan3
BkLabel : 1150
BkInterface : Tun5
Destination : 3.3.3.3
FEC : 2.2.2.2/5/16429
Protocol : RSVP
LSR Type : Ingress
Service : -
NHLFE ID : 1025
State : Active
Out-Label : 1151
Nexthop : 3.2.1.5
Out-Interface: Vlan5
Destination : 3.1.1.3
FEC : 3.1.1.3
Protocol : Local
LSR Type : Ingress
Service : -
NHLFE ID : 1027
State : Active
Nexthop : 3.1.1.3
Out-Interface: Vlan3
Destination : 3.2.1.5
FEC : 3.2.1.5
Protocol : Local
LSR Type : Ingress
Service : -
NHLFE ID : 1024
State : Active
Nexthop : 3.2.1.5
Out-Interface: Vlan5
Destination : 3.3.3.3
FEC : Tunnel5
Protocol : Local
LSR Type : Ingress
Service : -
NHLFE ID : 268435461
State : Active
Out-Interface: NHLFE1025
# 在Switch A上执行display ip routing-table命令,可以看到路由表中有以Tunnel4为出接口的静态路由信息。
[SwitchA] display ip routing-table
Destinations : 25 Routes : 25
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
1.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
2.1.1.0/24 Direct 0 0 2.1.1.1 Vlan2
2.1.1.0/32 Direct 0 0 2.1.1.1 Vlan2
2.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
2.1.1.255/32 Direct 0 0 2.1.1.1 Vlan2
2.2.2.2/32 OSPF 10 1 2.1.1.2 Vlan2
3.1.1.0/24 OSPF 10 2 2.1.1.2 Vlan2
3.2.1.0/24 OSPF 10 2 2.1.1.2 Vlan2
3.3.1.0/24 OSPF 10 3 2.1.1.2 Vlan2
3.3.3.3/32 OSPF 10 2 2.1.1.2 Vlan2
4.1.1.0/24 Static 1 0 0.0.0.0 Tun4
4.4.4.4/32 OSPF 10 3 2.1.1.2 Vlan2
5.5.5.5/32 OSPF 10 2 2.1.1.2 Vlan2
10.1.1.0/24 Direct 0 0 10.1.1.1 Tun4
10.1.1.0/32 Direct 0 0 10.1.1.1 Tun4
10.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
10.1.1.255/32 Direct 0 0 10.1.1.1 Tun4
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
· Switch A
#
ospf 1
area 0.0.0.0
network 1.1.1.1 0.0.0.0
network 2.1.1.0 0.0.0.255
mpls te enable
#
mpls lsr-id 1.1.1.1
#
vlan 2
#
mpls te
#
explicit-path pri-path
nexthop index 1 2.1.1.2 include strict
nexthop index 101 3.1.1.3 include strict
nexthop index 201 4.1.1.4 include strict
nexthop index 301 4.4.4.4 include strict
#
rsvp
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
#
interface Vlan-interface2
ip address 2.1.1.1 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 2
#
interface Tunnel4 mode mpls-te
ip address 10.1.1.1 255.255.255.0
mpls te bandwidth ct0 30000
mpls te path preference 1 explicit-path pri-path
mpls te fast-reroute
destination 4.4.4.4
#
ip route-static 4.1.1.0 24 Tunnel4 preference 1
#
· Switch B
#
ospf 1
area 0.0.0.0
network 2.1.1.0 0.0.0.255
network 2.2.2.2 0.0.0.0
network 3.1.1.0 0.0.0.255
network 3.2.1.0 0.0.0.255
mpls te enable
#
mpls lsr-id 2.2.2.2
#
vlan 2 to 3
#
vlan 5
#
mpls te
fast-reroute timer 5
#
explicit-path by-path
nexthop index 1 3.2.1.5 include strict
nexthop index 101 3.3.1.3 include strict
nexthop index 201 3.3.3.3 include strict
#
rsvp
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
#
interface Vlan-interface2
ip address 2.1.1.2 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Vlan-interface3
ip address 3.1.1.2 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
mpls te fast-reroute bypass-tunnel Tunnel5
rsvp enable
rsvp bfd enable
#
interface Vlan-interface5
ip address 3.2.1.2 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 2
#
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port access vlan 3
#
interface Ten-GigabitEthernet1/0/3
port link-mode bridge
port access vlan 5
#
interface Tunnel5 mode mpls-te
ip address 11.1.1.1 255.255.255.0
mpls te bandwidth ct0 30000
mpls te path preference 1 explicit-path by-path
mpls te backup bandwidth un-limited
destination 3.3.3.3
#
· Switch C
#
ospf 1
area 0.0.0.0
network 3.1.1.0 0.0.0.255
network 3.3.1.0 0.0.0.255
network 3.3.3.3 0.0.0.0
network 4.1.1.0 0.0.0.255
mpls te enable
#
mpls lsr-id 3.3.3.3
#
vlan 3 to 4
#
vlan 6
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.255
#
interface Vlan-interface3
ip address 3.1.1.3 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
rsvp bfd enable
#
interface Vlan-interface4
ip address 4.1.1.3 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Vlan-interface6
ip address 3.3.1.3 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 4
#
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port access vlan 3
#
interface Ten-GigabitEthernet1/0/3
port link-mode bridge
port access vlan 6
#
· Switch D
#
ospf 1
area 0.0.0.0
network 4.1.1.0 0.0.0.255
network 4.4.4.4 0.0.0.0
mpls te enable
#
mpls lsr-id 4.4.4.4
#
vlan 4
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.255
#
interface Vlan-interface4
ip address 4.1.1.4 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 4
#
· Switch E
#
ospf 1
area 0.0.0.0
network 3.2.1.0 0.0.0.255
network 3.3.1.0 0.0.0.255
network 5.5.5.5 0.0.0.0
mpls te enable
#
mpls lsr-id 5.5.5.5
#
vlan 5 to 6
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 5.5.5.5 255.255.255.255
#
interface Vlan-interface5
ip address 3.2.1.5 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Vlan-interface6
ip address 3.3.1.5 255.255.255.0
mpls enable
mpls te enable
mpls te max-link-bandwidth 50000
mpls te max-reservable-bandwidth 40000
rsvp enable
#
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port access vlan 5
#
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port access vlan 6
#
· H3C S12500-S系列交换机 MPLS配置指导-Release 7150P02
· H3C S12500-S系列交换机 MPLS命令参考-Release 7150P02
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