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66-MPLS OAM典型配置举例
本章节下载： 66-MPLS OAM典型配置举例 (360.71 KB)
H3C S6850&S9850&S9820-64H MPLS OAM典型配置举例
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目 录
本文档介绍MPLS OAM配置举例。
MPLS OAM（Operations, Administration and Maintenance，操作、管理和维护）功能为MPLS网络提供了数据平面连通性检测、数据平面与控制平面一致性校验、故障点定位等多种错误管理（Fault Management）工具。MPLS OAM利用这些错误管理工具对LSP、MPLS TE隧道和MPLS PW进行检测和故障定位，降低了MPLS网络的管理和维护的复杂度，提高了MPLS网络的可用性。
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 OAM特性。
如图1所示，某公司有两个位于不同的地理位置的分支机构通过运营商的MPLS骨干网互联，两个分支机构之间需要进行实时业务的同步传输。该公司要求运营商提供高可靠性的服务，以保证实时业务的不间断性。
为满足该用户需求，可通过在MPLS骨干网中部署LDP FRR服务来提供主备两条LSP链路，并配置LDP与BFD联动技术提高主备链路的切换速度，具体实现如下：
· 正常情况下，使用主LSP链路转发PE 1和PE 2之间的流量。
· 使用BFD对主链路进行监测，当主链路发生故障时，BFD能够快速感知并通告LDP协议，使得PE 1和PE 2之间的流量迅速切换到备LSP链路进行转发。
图1 BFD检测LSP配置组网图
|
产品 |
软件版本 |
|
S6850系列 S9850系列 |
Release 6555P01 |
|
S9820-64H |
Release 6555P01 |
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1配置各接口的IP地址和掩码，包括LoopBack接口，下面以PE 1为例，其它设备配置方法类似，具体配置过程略。
<PE1> system-view
[PE1] vlan 10
[PE1-vlan10] port hundredgige 1/0/3
[PE1-vlan10] quit
[PE1] interface vlan-interface 10
[PE1-Vlan-interface10] ip address 192.168.10.1 24
[PE1] vlan 12
[PE1-vlan12] port hundredgige 1/0/1
[PE1-vlan12] quit
[PE1] interface vlan-interface 12
[PE1-Vlan-interface12] ip address 12.12.12.1 24
[PE1-Vlan-interface12] quit
[PE1] vlan 14
[PE1-vlan14] port hundredgige 1/0/2
[PE1-vlan14] quit
[PE1] interface vlan-interface 14
[PE1-Vlan-interface14] ip address 14.14.14.1 24
[PE1-Vlan-interface14] quit
[PE1] interface loopback 0
[PE1-LoopBack0] ip address 1.1.1.1 32
[PE1-LoopBack0] quit
(2) 在MPLS骨干网内配置OSPF，以保证各路由器之间路由可达，并使能OSPF快速重路由功能。
# 配置PE 1。
[PE1] ospf
[PE1-ospf-1] area 0
[PE1-ospf-1-area-0.0.0.0] network 1.1.1.1 0.0.0.0
[PE1-ospf-1-area-0.0.0.0] network 12.12.12.0 0.0.0.255
[PE1-ospf-1-area-0.0.0.0] network 14.14.14.0 0.0.0.255
[PE1-ospf-1-area-0.0.0.0] network 192.168.10.0 0.0.0.255
[PE1-ospf-1-area-0.0.0.0] quit
[PE1-ospf-1] fast-reroute lfa
[PE1-ospf-1] quit
# 配置P 1。
[P1] ospf
[P1-ospf-1] area 0
[P1-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0
[P1-ospf-1-area-0.0.0.0] network 12.12.12.0 0.0.0.255
[P1-ospf-1-area-0.0.0.0] network 23.23.23.0 0.0.0.255
[P1-ospf-1-area-0.0.0.0] quit
[P1-ospf-1] quit
# 配置PE 2。
[PE2] ospf
[PE2-ospf-1] area 0
[PE2-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0
[PE2-ospf-1-area-0.0.0.0] network 23.23.23.0 0.0.0.255
[PE2-ospf-1-area-0.0.0.0] network 34.34.34..0 0.0.0.255
[PE2-ospf-1-area-0.0.0.0] network 192.168.20.0 0.0.0.255
[PE2-ospf-1-area-0.0.0.0] quit
[PE2-ospf-1] fast-reroute lfa
[PE2-ospf-1] quit
# 配置P 2。
[P2] ospf
[P2-ospf-1] area 0
[P2-ospf-1-area-0.0.0.0] network 4.4.4.4 0.0.0.0
[P2-ospf-1-area-0.0.0.0] network 14.14.14.0 0.0.0.255
[P2-ospf-1-area-0.0.0.0] network 34.34.34.0 0.0.0.255
[P2-ospf-1-area-0.0.0.0] quit
[P2-ospf-1] quit
# 调整P 2上Vlan-interface14和Vlan-interface34的OSPF cost值，使备份LSP路径上的OSPF开销值大于主LSP路径。
[P2] interface vlan-interface 14
[P2-Vlan-interface14] ospf cost 10
[P2-Vlan-interface14] quit
[P2] interface vlan-interface 34
[P2-Vlan-interface34] ospf cost 10
[P2-Vlan-interface34] quit
(3) 配置MPLS基本能力，并使能LDP
# 配置PE 1。
[PE1] mpls lsr-id 1.1.1.1
[PE1] mpls ldp
[PE1-ldp] quit
[PE1] interface vlan-interface 12
[PE1-Vlan-interface12] mpls enable
[PE1-Vlan-interface12] mpls ldp enable
[PE1-Vlan-interface12] quit
[PE1] interface vlan-interface 14
[PE1-Vlan-interface14] mpls enable
[PE1-Vlan-interface14] mpls ldp enable
[PE1-Vlan-interface14] quit
# 配置P 1。
[P1] mpls lsr-id 2.2.2.2
[P1] mpls ldp
[P1-ldp] quit
[P1] interface vlan-interface 12
[P1-Vlan-interface12] mpls enable
[P1-Vlan-interface12] mpls ldp enable
[P1-Vlan-interface12] quit
[P1] interface vlan-interface 23
[P1-Vlan-interface23] mpls enable
[P1-Vlan-interface23] mpls ldp enable
[P1-Vlan-interface23] quit
# 配置PE 2。
[PE2] mpls lsr-id 3.3.3.3
[PE2] mpls ldp
[PE2-ldp] quit
[PE2] interface vlan-interface 23
[PE2-Vlan-interface23] mpls enable
[PE2-Vlan-interface23] mpls ldp enable
[PE2-Vlan-interface23] quit
[PE2] interface vlan-interface 34
[PE2-Vlan-interface34] mpls enable
[PE2-Vlan-interface34] mpls ldp enable
[PE2-Vlan-interface34] quit
# 配置P 2。
[P2] mpls lsr-id 4.4.4.4
[P2] mpls ldp
[P2-ldp] quit
[P2] interface vlan-interface 14
[P2-Vlan-interface14] mpls enable
[P2-Vlan-interface14] mpls ldp enable
[P2-Vlan-interface14] quit
[P2] interface vlan-interface 34
[P2-Vlan-interface34] mpls enable
[P2-Vlan-interface34] mpls ldp enable
[P2-Vlan-interface34] quit
完成上述配置后，在各设备上可以看到LDP会话的状态为operational，会话建立成功。以PE1为例：
[PE1] display mpls ldp peer
Total number of peers: 2
Peer LDP ID State Role GR MD5 KA Sent/Rcvd
2.2.2.2:0 Operational Passive Off Off 55/55
4.4.4.4:0 Operational Passive Off Off 6/6
(4) 配置LSP的触发策略，为目的地址为192.168.10.0/24、192.168.20.0/24、1.1.1.1/32和3.3.3.3/32的路由表项建立LSP
# 在PE 1上创建IP地址前缀列表PE1，并配置只有通过该列表过滤的路由表项能够触发LDP建立LSP。
[PE1] ip prefix-list PE1 index 10 permit 192.168.10.0 24
[PE1] ip prefix-list PE1 index 20 permit 192.168.20.0 24
[PE1] ip prefix-list PE1 index 30 permit 1.1.1.1 32
[PE1] ip prefix-list PE1 index 40 permit 3.3.3.3 32
[PE1] mpls ldp
[PE1-ldp] lsp-trigger prefix-list PE1
[PE1-ldp] quit
# 在P 1上创建IP地址前缀列表P1，并配置只有通过该列表过滤的路由表项能够触发LDP建立LSP。
[P1] ip prefix-list P1 index 10 permit 192.168.10.0 24
[P1] ip prefix-list P1 index 20 permit 192.168.20.0 24
[P1] ip prefix-list P1 index 30 permit 1.1.1.1 32
[P1] ip prefix-list P1 index 40 permit 3.3.3.3 32
[P1] mpls ldp
[P1-ldp] lsp-trigger prefix-list P1
[P1-ldp] quit
# 在PE 2上创建IP地址前缀列表PE 2，并配置只有通过该列表过滤的路由表项能够触发LDP建立LSP。
[PE2] ip prefix-list PE2 index 10 permit 192.168.10.0 24
[PE2] ip prefix-list PE2 index 20 permit 192.168.20.0 24
[PE2] ip prefix-list PE2 index 30 permit 1.1.1.1 32
[PE2] ip prefix-list PE2 index 40 permit 3.3.3.3 32
[PE2] mpls ldp
[PE2-ldp] lsp-trigger prefix-list PE2
[PE2-ldp] quit
# 在P 2上创建IP地址前缀列表P2，并配置只有通过该列表过滤的路由表项能够触发LDP建立LSP。
[P2] ip prefix-list P2 index 10 permit 192.168.10.0 24
[P2] ip prefix-list P2 index 20 permit 192.168.20.0 24
[P2] ip prefix-list P2 index 30 permit 1.1.1.1 32
[P2] ip prefix-list P2 index 40 permit 3.3.3.3 32
[P2] mpls ldp
[P2-ldp] lsp-trigger prefix-list P2
[P2-ldp] quit
# 配置完成后，在PE 1上执行display mpls ldp lsp命令，查看LDP LSP的建立情况，可以看到去往192.168.20.0/24网段的两条LSP已经建立完成，出接口为Vlan-interface12的LSP为主LSP，出接口为Vlan-interface14的LSP为备用LSP。
[PE1]display mpls ldp lsp
Status Flags: * - stale, L - liberal, B - backup
Statistics:
FECs: 4 Ingress LSPs: 4 Transit LSPs: 4 Egress LSPs: 2
FEC In/Out Label Nexthop OutInterface
1.1.1.1/32 3/-
-/1151(L)
-/1279(L)
3.3.3.3/32 -/1150 12.12.12.2 Vlan12
1150/1150 12.12.12.2 Vlan12
-/1150(B) 12.12.12.2 Vlan14
1150/1150(B) 12.12.12.2 Vlan14
192.168.10.0/24 1141/-
-/1141(L)
-/1141(L)
192.168.20.0/24 -/1133 12.12.12.2 Vlan12
1133/1133 12.12.12.2 Vlan12
-/1133(B) 14.14.14.4 Vlan14
1133/1133(B) 14.14.14.4 Vlan14
(5) 使能MPLS与BFD联动功能，并配置通过BFD检测LSP的连通性
# 配置PE 1。
[PE1] mpls bfd enable
[PE1] mpls bfd 3.3.3.3 32
# 配置PE 2。
[PE2] mpls bfd enable
[PE2] mpls bfd 1.1.1.1 32
(1) 配置完成后，在设备PE 1和PE 2上执行display mpls bfd命令，可以看到检测LSP的BFD会话的建立情况。以PE 1为例。
[PE1] display mpls bfd
Total number of sessions: 2, 2 up, 0 down, 0 init
FEC Type: LSP
FEC Info:
Destination: 1.1.1.1
Mask Length: 32
NHLFE ID: -
Local Discr: 1026 Remote Discr: 514
Source IP: 1.1.1.1 Destination IP: 3.3.3.3
Session State: Up Session Role: Active
Template Name: -
FEC Type: LSP
FEC Info:
Destination: 3.3.3.3
Mask Length: 32
NHLFE ID: 1028
Local Discr: 1025 Remote Discr: -
Source IP: 1.1.1.1 Destination IP: 127.0.0.1
Session State: Up Session Role: Passive
Template Name: -
(2) 在PE 1上使用tracert mpls ipv4命令查看到当前所使用的路径是主LSP。（使用Tracert功能需要在中间设备上开启ICMP超时报文发送功能，在目的端开启ICMP目的不可达报文发送功能）
[PE1] tracert mpls -a 192.168.10.1 ipv4 192.168.20.0 24
MPLS trace route FEC 192.168.20.0/24
TTL Replier Time Type Downstream
0 Ingress 12.12.12.2/[1148]
1 12.12.12.2 2 ms Transit 23.23.23.3/[1148]
2 23.23.23.3 2 ms Egress
(3) 在PE 1上持续ping PE 2，期间将P 1的Vlan-interface23接口shutdown，查看通信是否中断。
#在PE 1上持续ping PE 2，
[PE1] ping -c 100000 -a 192.168.10.1 192.168.20.1
Ping 192.168.20.1 (192.168.20.1) from 192.168.10.1: 56 data bytes, press CTRL_C
to break
56 bytes from 192.168.20.1: icmp_seq=0 ttl=254 time=2.576 ms
56 bytes from 192.168.20.1: icmp_seq=1 ttl=254 time=1.996 ms
...
# 关闭P 1的Vlan-interface23接口。
[P1] interface vlan-interface 23
[P1-Vlan-interface23] shutdown
#在PE1上查看到通讯断开后迅速恢复。
[PE1] ping -c 100000 -a 192.168.10.1 192.168.20.1
Ping 192.168.20.1 (192.168.20.1) from 192.168.10.1: 56 data bytes, press CTRL_C
to break
56 bytes from 192.168.20.1: icmp_seq=0 ttl=254 time=2.576 ms
56 bytes from 192.168.20.1: icmp_seq=1 ttl=254 time=1.996 ms
...
56 bytes from 192.168.20.1: icmp_seq=7 ttl=254 time=2.214 ms
Request time out
56 bytes from 192.168.20.1: icmp_seq=9 ttl=254 time=2.659 ms
56 bytes from 192.168.20.1: icmp_seq=10 ttl=254 time=5.049 ms
56 bytes from 192.168.20.1: icmp_seq=11 ttl=254 time=2.098 ms
56 bytes from 192.168.20.1: icmp_seq=12 ttl=254 time=2.225 ms
56 bytes from 192.168.20.1: icmp_seq=13 ttl=254 time=2.187 ms
--- Ping statistics for 192.168.20.1 ---
14 packet(s) transmitted, 13 packet(s) received, 7.1% packet loss
round-trip min/avg/max/std-dev = 1.990/2.455/5.049/0.772 ms
(4) 查看链路是否发生切换。
# 在PE 1上使用tracert mpls ipv4命令查看到当前所使用的路径是备份LSP。
[PE1] tracert mpls -a 192.168.10.1 ipv4 192.168.20.0 24
MPLS trace route FEC 192.168.20.0/24
TTL Replier Time Type Downstream
0 Ingress 14.14.14.4/[1276]
1 14.14.14.4 2 ms Transit 34.34.34.3/[1148]
2 34.34.34.3 2 ms Egress
· PE 1
#
ospf 1
fast-reroute lfa
area 0.0.0.0
network 1.1.1.1 0.0.0.0
network 12.12.12.0 0.0.0.255
network 14.14.14.0 0.0.0.255
network 192.168.10.0 0.0.0.255
#
mpls lsr-id 1.1.1.1
#
vlan 10
#
vlan 12
#
vlan 14
#
mpls ldp
lsp-trigger prefix-list PE1
#
mpls bfd enable
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
#
interface Vlan-interface10
ip address 192.168.10.1 255.255.255.0
#
interface Vlan-interface12
ip address 12.12.12.1 255.255.255.0
mpls enable
mpls ldp enable
#
interface Vlan-interface14
ip address 14.14.14.1 255.255.255.0
mpls enable
mpls ldp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 12
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 14
#
interface HundredGigE1/0/3
port link-mode bridge
port access vlan 10
#
ip prefix-list PE1 index 10 permit 192.168.10.0 24
ip prefix-list PE1 index 20 permit 192.168.20.0 24
ip prefix-list PE1 index 30 permit 1.1.1.1 32
ip prefix-list PE1 index 40 permit 3.3.3.3 32
#
mpls bfd 3.3.3.3 32
#
· PE 2
#
ospf 1
fast-reroute lfa
area 0.0.0.0
network 3.3.3.3 0.0.0.0
network 23.23.23.0 0.0.0.255
network 34.34.34.0 0.0.0.255
network 192.168.20.0 0.0.0.255
#
vlan 23
#
vlan 30
#
vlan 34
#
mpls lsr-id 3.3.3.3
#
mpls ldp
lsp-trigger prefix-list PE2
#
mpls bfd enable
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.255
#
interface Vlan-interface23
ip address 23.23.23.3 255.255.255.0
mpls enable
mpls ldp enable
#
interface Vlan-interface30
ip address 192.168.20.1 255.255.255.0
#
interface Vlan-interface34
ip address 34.34.34.3 255.255.255.0
mpls enable
mpls ldp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 34
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 23
#
interface HundredGigE1/0/3
port link-mode bridge
port access vlan 30
#
ip prefix-list PE2 index 10 permit 192.168.10.0 24
ip prefix-list PE2 index 20 permit 192.168.20.0 24
ip prefix-list PE2 index 30 permit 1.1.1.1 32
ip prefix-list PE2 index 40 permit 3.3.3.3 32
#
mpls bfd 1.1.1.1 32
#
· P 1
#
ospf 1
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 12.12.12.0 0.0.0.255
network 23.23.23.0 0.0.0.255
#
mpls lsr-id 2.2.2.2
#
vlan 12
#
vlan 23
#
mpls ldp
lsp-trigger prefix-list P1
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
#
interface Vlan-interface12
ip address 12.12.12.2 255.255.255.0
mpls enable
mpls ldp enable
#
interface Vlan-interface23
ip address 23.23.23.2 255.255.255.0
mpls enable
mpls ldp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 12
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 23
#
ip prefix-list P1 index 10 permit 192.168.10.0 24
ip prefix-list P1 index 20 permit 192.168.20.0 24
ip prefix-list P1 index 30 permit 1.1.1.1 32
ip prefix-list P1 index 40 permit 3.3.3.3 32
#
· P 2
#
ospf 1
area 0.0.0.0
network 4.4.4.4 0.0.0.0
network 14.14.14.0 0.0.0.255
network 34.34.34.0 0.0.0.255
#
mpls lsr-id 4.4.4.4
#
vlan 14
#
vlan 34
#
mpls ldp
lsp-trigger prefix-list P2
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.255
#
interface Vlan-interface14
ip address 14.14.14.4 255.255.255.0
ospf cost 10
mpls enable
mpls ldp enable
#
interface Vlan-interface34
ip address 34.34.34.4 255.255.255.0
ospf cost 10
mpls enable
mpls ldp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 34
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 14
#
ip prefix-list P2 index 10 permit 192.168.10.0 24
ip prefix-list P2 index 20 permit 192.168.20.0 24
ip prefix-list P2 index 30 permit 1.1.1.1 32
ip prefix-list P2 index 40 permit 3.3.3.3 32
#
如图2所示，某公司有两个位于不同的地理位置的分支机构通过运营商的MPLS骨干网互联，两个分支机构之间需要进行实时业务的同步传输。该公司要求运营商提供高可靠性的服务，以保证实时业务的不间断性。
为满足该用户需求，可通过在MPLS骨干网中部署LDP FRR服务来提供主备两条LSP链路，并配置LDP与SBFD联动技术提高主备链路的切换速度，具体实现如下：
· 正常情况下，使用主LSP链路转发PE 1和PE 2之间的流量。
· 使用SBFD对主链路进行监测，当主链路发生故障时，BFD能够快速感知并通告LDP协议，使得PE 1和PE 2之间的流量迅速切换到备LSP链路进行转发。
图2 BFD检测LSP配置组网图
表2 适用产品及版本
|
产品 |
软件版本 |
|
S6850系列 S9850系列 |
Release 6555P01 |
|
S9820-64H |
Release 6555P01 |
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2配置各接口的IP地址和掩码，包括LoopBack接口，下面以PE 1为例，其它设备配置方法类似，具体配置过程略。
<PE1> system-view
[PE1] vlan 10
[PE1-vlan10] port hundredgige 1/0/3
[PE1-vlan10] quit
[PE1] interface vlan-interface 10
[PE1-Vlan-interface10] ip address 192.168.10.1 24
[PE1] vlan 12
[PE1-vlan12] port hundredgige 1/0/1
[PE1-vlan12] quit
[PE1] interface vlan-interface 12
[PE1-Vlan-interface12] ip address 12.12.12.1 24
[PE1-Vlan-interface12] quit
[PE1] vlan 14
[PE1-vlan14] port hundredgige 1/0/2
[PE1-vlan14] quit
[PE1] interface vlan-interface 14
[PE1-Vlan-interface14] ip address 14.14.14.1 24
[PE1-Vlan-interface14] quit
[PE1] interface loopback 0
[PE1-LoopBack0] ip address 1.1.1.1 32
[PE1-LoopBack0] quit
(2) 在MPLS骨干网内配置OSPF，以保证各路由器之间路由可达，并使能OSPF快速重路由功能。
# 配置PE 1。
[PE1] ospf
[PE1-ospf-1] area 0
[PE1-ospf-1-area-0.0.0.0] network 1.1.1.1 0.0.0.0
[PE1-ospf-1-area-0.0.0.0] network 12.12.12.0 0.0.0.255
[PE1-ospf-1-area-0.0.0.0] network 14.14.14.0 0.0.0.255
[PE1-ospf-1-area-0.0.0.0] network 192.168.10.0 0.0.0.255
[PE1-ospf-1-area-0.0.0.0] quit
[PE1-ospf-1] fast-reroute lfa
[PE1-ospf-1] quit
# 配置P 1。
[P1] ospf
[P1-ospf-1] area 0
[P1-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0
[P1-ospf-1-area-0.0.0.0] network 12.12.12.0 0.0.0.255
[P1-ospf-1-area-0.0.0.0] network 23.23.23.0 0.0.0.255
[P1-ospf-1-area-0.0.0.0] quit
[P1-ospf-1] quit
# 配置PE 2。
[PE2] ospf
[PE2-ospf-1] area 0
[PE2-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0
[PE2-ospf-1-area-0.0.0.0] network 23.23.23.0 0.0.0.255
[PE2-ospf-1-area-0.0.0.0] network 34.34.34..0 0.0.0.255
[PE2-ospf-1-area-0.0.0.0] network 192.168.20.0 0.0.0.255
[PE2-ospf-1-area-0.0.0.0] quit
[PE2-ospf-1] fast-reroute lfa
[PE2-ospf-1] quit
# 配置P 2。
[P2] ospf
[P2-ospf-1] area 0
[P2-ospf-1-area-0.0.0.0] network 4.4.4.4 0.0.0.0
[P2-ospf-1-area-0.0.0.0] network 14.14.14.0 0.0.0.255
[P2-ospf-1-area-0.0.0.0] network 34.34.34.0 0.0.0.255
[P2-ospf-1-area-0.0.0.0] quit
[P2-ospf-1] quit
# 调整P 2上Vlan-interface14和Vlan-interface34的OSPF cost值，使备份LSP路径上的OSPF开销值大于主LSP路径。
[P2] interface vlan-interface 14
[P2-Vlan-interface14] ospf cost 10
[P2-Vlan-interface14] quit
[P2] interface vlan-interface 34
[P2-Vlan-interface34] ospf cost 10
[P2-Vlan-interface34] quit
(3) 配置MPLS基本能力，并使能LDP
# 配置PE 1。
[PE1] mpls lsr-id 1.1.1.1
[PE1] mpls ldp
[PE1-ldp] quit
[PE1] interface vlan-interface 12
[PE1-Vlan-interface12] mpls enable
[PE1-Vlan-interface12] mpls ldp enable
[PE1-Vlan-interface12] quit
[PE1] interface vlan-interface 14
[PE1-Vlan-interface14] mpls enable
[PE1-Vlan-interface14] mpls ldp enable
[PE1-Vlan-interface14] quit
# 配置P 1。
[P1] mpls lsr-id 2.2.2.2
[P1] mpls ldp
[P1-ldp] quit
[P1] interface vlan-interface 12
[P1-Vlan-interface12] mpls enable
[P1-Vlan-interface12] mpls ldp enable
[P1-Vlan-interface12] quit
[P1] interface vlan-interface 23
[P1-Vlan-interface23] mpls enable
[P1-Vlan-interface23] mpls ldp enable
[P1-Vlan-interface23] quit
# 配置PE 2。
[PE2] mpls lsr-id 3.3.3.3
[PE2] mpls ldp
[PE2-ldp] quit
[PE2] interface vlan-interface 23
[PE2-Vlan-interface23] mpls enable
[PE2-Vlan-interface23] mpls ldp enable
[PE2-Vlan-interface23] quit
[PE2] interface vlan-interface 34
[PE2-Vlan-interface34] mpls enable
[PE2-Vlan-interface34] mpls ldp enable
[PE2-Vlan-interface34] quit
# 配置P 2。
[P2] mpls lsr-id 4.4.4.4
[P2] mpls ldp
[P2-ldp] quit
[P2] interface vlan-interface 14
[P2-Vlan-interface14] mpls enable
[P2-Vlan-interface14] mpls ldp enable
[P2-Vlan-interface14] quit
[P2] interface vlan-interface 34
[P2-Vlan-interface34] mpls enable
[P2-Vlan-interface34] mpls ldp enable
[P2-Vlan-interface34] quit
完成上述配置后，在各设备上可以看到LDP会话的状态为operational，会话建立成功。以PE1为例：
[PE1] display mpls ldp peer
Total number of peers: 2
Peer LDP ID State Role GR MD5 KA Sent/Rcvd
2.2.2.2:0 Operational Passive Off Off 55/55
4.4.4.4:0 Operational Passive Off Off 6/6
(4) 配置LSP的触发策略，为目的地址为192.168.10.0/24、192.168.20.0/24、1.1.1.1/32和3.3.3.3/32的路由表项建立LSP
# 在PE 1上创建IP地址前缀列表PE1，并配置只有通过该列表过滤的路由表项能够触发LDP建立LSP。
[PE1] ip prefix-list PE1 index 10 permit 192.168.10.0 24
[PE1] ip prefix-list PE1 index 20 permit 192.168.20.0 24
[PE1] ip prefix-list PE1 index 30 permit 1.1.1.1 32
[PE1] ip prefix-list PE1 index 40 permit 3.3.3.3 32
[PE1] mpls ldp
[PE1-ldp] lsp-trigger prefix-list PE1
[PE1-ldp] quit
# 在P 1上创建IP地址前缀列表P1，并配置只有通过该列表过滤的路由表项能够触发LDP建立LSP。
[P1] ip prefix-list P1 index 10 permit 192.168.10.0 24
[P1] ip prefix-list P1 index 20 permit 192.168.20.0 24
[P1] ip prefix-list P1 index 30 permit 1.1.1.1 32
[P1] ip prefix-list P1 index 40 permit 3.3.3.3 32
[P1] mpls ldp
[P1-ldp] lsp-trigger prefix-list P1
[P1-ldp] quit
# 在PE 2上创建IP地址前缀列表PE 2，并配置只有通过该列表过滤的路由表项能够触发LDP建立LSP。
[PE2] ip prefix-list PE2 index 10 permit 192.168.10.0 24
[PE2] ip prefix-list PE2 index 20 permit 192.168.20.0 24
[PE2] ip prefix-list PE2 index 30 permit 1.1.1.1 32
[PE2] ip prefix-list PE2 index 40 permit 3.3.3.3 32
[PE2] mpls ldp
[PE2-ldp] lsp-trigger prefix-list PE2
[PE2-ldp] quit
# 在P 2上创建IP地址前缀列表P2，并配置只有通过该列表过滤的路由表项能够触发LDP建立LSP。
[P2] ip prefix-list P2 index 10 permit 192.168.10.0 24
[P2] ip prefix-list P2 index 20 permit 192.168.20.0 24
[P2] ip prefix-list P2 index 30 permit 1.1.1.1 32
[P2] ip prefix-list P2 index 40 permit 3.3.3.3 32
[P2] mpls ldp
[P2-ldp] lsp-trigger prefix-list P2
[P2-ldp] quit
# 配置完成后，在PE 1上执行display mpls ldp lsp命令，查看LDP LSP的建立情况，可以看到去往192.168.20.0/24网段的两条LSP已经建立完成，出接口为Vlan-interface12的LSP为主LSP，出接口为Vlan-interface14的LSP为备用LSP。
[PE1] display mpls ldp lsp
Status Flags: * - stale, L - liberal, B - backup
Statistics:
FECs: 4 Ingress LSPs: 4 Transit LSPs: 4 Egress LSPs: 2
FEC In/Out Label Nexthop OutInterface
1.1.1.1/32 3/-
-/1151(L)
-/1279(L)
3.3.3.3/32 -/1150 12.12.12.2 Vlan12
1150/1150 12.12.12.2 Vlan12
-/1150(B) 12.12.12.2 Vlan14
1150/1150(B) 12.12.12.2 Vlan14
192.168.10.0/24 1141/-
-/1141(L)
-/1141(L)
192.168.20.0/24 -/1133 12.12.12.2 Vlan12
1133/1133 12.12.12.2 Vlan12
-/1133(B) 14.14.14.4 Vlan14
1133/1133(B) 14.14.14.4 Vlan14
(5) 使能MPLS与BFD联动功能，并配置通过SBFD检测LSP的连通性
# 配置PE 1。
[PE1] mpls bfd enable
[PE1] sbfd local-discriminator 3000000
[PE1] mpls sbfd 3.3.3.3 32 remote 2000000
# 配置PE 2。
[PE2] mpls bfd enable
[PE2] sbfd local-discriminator 2000000
[PE2] mpls sbfd 1.1.1.1 32 remote 3000000
(1) 配置完成后，在设备PE 1和PE 2上执行display mpls sbfd命令，可以看到检测LSP的BFD会话的建立情况。以PE 1为例。
[PE1] display mpls sbfd
Total number of sessions: 1, 1 up, 0 down, 0 init
FEC Type: LSP
FEC Info:
Destination: 3.3.3.3
Mask Length: 32
NHLFE ID: 2
Local Discr: 513 Remote Discr: 2000000
Source IP: 1.1.1.1 Destination IP: 127.0.0.1
Session State: Up
Template Name: -
(2) 在PE 1上使用tracert mpls ipv4命令查看到当前所使用的路径是主LSP。（使用Tracert功能需要在中间设备上开启ICMP超时报文发送功能，在目的端开启ICMP目的不可达报文发送功能）
[PE1] tracert mpls -a 192.168.10.1 ipv4 192.168.20.0 24
MPLS trace route FEC 192.168.20.0/24
TTL Replier Time Type Downstream
0 Ingress 12.12.12.2/[1148]
1 12.12.12.2 2 ms Transit 23.23.23.3/[1148]
2 23.23.23.3 2 ms Egress
(3) 在PE 1上持续ping PE 2，期间将P 1的Vlan-interface23接口shutdown，查看通信是否中断。
# 在PE 1上持续ping PE 2，
[PE1] ping -c 100000 -a 192.168.10.1 192.168.20.1
Ping 192.168.20.1 (192.168.20.1) from 192.168.10.1: 56 data bytes, press CTRL_C
to break
56 bytes from 192.168.20.1: icmp_seq=0 ttl=254 time=2.576 ms
56 bytes from 192.168.20.1: icmp_seq=1 ttl=254 time=1.996 ms
...
# 关闭P 1的Vlan-interface23接口。
[P1] interface vlan-interface 23
[P1-Vlan-interface23] shutdown
#在PE1上查看到通讯断开后迅速恢复。
[PE1] ping -c 100000 -a 192.168.10.1 192.168.20.1
Ping 192.168.20.1 (192.168.20.1) from 192.168.10.1: 56 data bytes, press CTRL_C
to break
56 bytes from 192.168.20.1: icmp_seq=0 ttl=254 time=2.576 ms
56 bytes from 192.168.20.1: icmp_seq=1 ttl=254 time=1.996 ms
...
56 bytes from 192.168.20.1: icmp_seq=7 ttl=254 time=2.214 ms
Request time out
56 bytes from 192.168.20.1: icmp_seq=9 ttl=254 time=2.659 ms
56 bytes from 192.168.20.1: icmp_seq=10 ttl=254 time=5.049 ms
56 bytes from 192.168.20.1: icmp_seq=11 ttl=254 time=2.098 ms
56 bytes from 192.168.20.1: icmp_seq=12 ttl=254 time=2.225 ms
56 bytes from 192.168.20.1: icmp_seq=13 ttl=254 time=2.187 ms
--- Ping statistics for 192.168.20.1 ---
14 packet(s) transmitted, 13 packet(s) received, 7.1% packet loss
round-trip min/avg/max/std-dev = 1.990/2.455/5.049/0.772 ms
(4) 查看链路是否发生切换。
# 在PE 1上使用tracert mpls ipv4命令查看到当前所使用的路径是备份LSP。
[PE1] tracert mpls -a 192.168.10.1 ipv4 192.168.20.0 24
MPLS trace route FEC 192.168.20.0/24
TTL Replier Time Type Downstream
0 Ingress 14.14.14.4/[1276]
1 14.14.14.4 2 ms Transit 34.34.34.3/[1148]
2 34.34.34.3 2 ms Egress
· PE 1
#
ospf 1
fast-reroute lfa
area 0.0.0.0
network 1.1.1.1 0.0.0.0
network 12.12.12.0 0.0.0.255
network 14.14.14.0 0.0.0.255
network 192.168.10.0 0.0.0.255
#
mpls lsr-id 1.1.1.1
#
vlan 10
#
vlan 12
#
vlan 14
#
mpls ldp
lsp-trigger prefix-list PE1
#
mpls bfd enable
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
#
interface Vlan-interface10
ip address 192.168.10.1 255.255.255.0
#
interface Vlan-interface12
ip address 12.12.12.1 255.255.255.0
mpls enable
mpls ldp enable
#
interface Vlan-interface14
ip address 14.14.14.1 255.255.255.0
mpls enable
mpls ldp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 12
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 14
#
interface HundredGigE1/0/3
port link-mode bridge
port access vlan 10
#
ip prefix-list PE1 index 10 permit 192.168.10.0 24
ip prefix-list PE1 index 20 permit 192.168.20.0 24
ip prefix-list PE1 index 30 permit 1.1.1.1 32
ip prefix-list PE1 index 40 permit 3.3.3.3 32
#
mpls sbfd 3.3.3.3 32 remote 2000000
#
· PE 2
#
ospf 1
fast-reroute lfa
area 0.0.0.0
network 3.3.3.3 0.0.0.0
network 23.23.23.0 0.0.0.255
network 34.34.34.0 0.0.0.255
network 192.168.20.0 0.0.0.255
#
vlan 23
#
vlan 30
#
vlan 34
#
sbfd local-discriminator 2000000
#
mpls lsr-id 3.3.3.3
#
mpls ldp
lsp-trigger prefix-list PE2
#
mpls bfd enable
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.255
#
interface Vlan-interface23
ip address 23.23.23.3 255.255.255.0
mpls enable
mpls ldp enable
#
interface Vlan-interface30
ip address 192.168.20.1 255.255.255.0
#
interface Vlan-interface34
ip address 34.34.34.3 255.255.255.0
mpls enable
mpls ldp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 34
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 23
#
interface HundredGigE1/0/3
port link-mode bridge
port access vlan 30
#
ip prefix-list PE2 index 10 permit 192.168.10.0 24
ip prefix-list PE2 index 20 permit 192.168.20.0 24
ip prefix-list PE2 index 30 permit 1.1.1.1 32
ip prefix-list PE2 index 40 permit 3.3.3.3 32
#
mpls bfd 1.1.1.1 32
#
· P 1
#
ospf 1
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 12.12.12.0 0.0.0.255
network 23.23.23.0 0.0.0.255
#
mpls lsr-id 2.2.2.2
#
vlan 12
#
vlan 23
#
mpls ldp
lsp-trigger prefix-list P1
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
#
interface Vlan-interface12
ip address 12.12.12.2 255.255.255.0
mpls enable
mpls ldp enable
#
interface Vlan-interface23
ip address 23.23.23.2 255.255.255.0
mpls enable
mpls ldp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 12
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 23
#
ip prefix-list P1 index 10 permit 192.168.10.0 24
ip prefix-list P1 index 20 permit 192.168.20.0 24
ip prefix-list P1 index 30 permit 1.1.1.1 32
ip prefix-list P1 index 40 permit 3.3.3.3 32
#
· P 2
#
ospf 1
area 0.0.0.0
network 4.4.4.4 0.0.0.0
network 14.14.14.0 0.0.0.255
network 34.34.34.0 0.0.0.255
#
mpls lsr-id 4.4.4.4
#
vlan 14
#
vlan 34
#
mpls ldp
lsp-trigger prefix-list P2
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.255
#
interface Vlan-interface14
ip address 14.14.14.4 255.255.255.0
ospf cost 10
mpls enable
mpls ldp enable
#
interface Vlan-interface34
ip address 34.34.34.4 255.255.255.0
ospf cost 10
mpls enable
mpls ldp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 34
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 14
#
ip prefix-list P2 index 10 permit 192.168.10.0 24
ip prefix-list P2 index 20 permit 192.168.20.0 24
ip prefix-list P2 index 30 permit 1.1.1.1 32
ip prefix-list P2 index 40 permit 3.3.3.3 32
#
如图3所示，某公司有两个位于不同的地理位置的分支机构通过MPLS TE隧道实现互联，两个分支机构之间需要进行实时业务的同步传输。该公司要求运营商提供高可靠性的服务，以保证实时业务的不间断性。
为满足该用户需求，可通过部署CRLSP备份服务来提供主备两条CRLSP链路，并使用BFD检测MPLS TE技术提高主备CR-LSP的切换速度，具体实现如下：
· 正常情况下，使用CR-LSP 1作为主CR-LSP，负责转发Router A和Router C之间的流量。
· 使用BFD对主CR-LSP进行监测，当主CR-LSP发生故障时，BFD能够快速感知并通告RSVP协议，使得Router A和Router C之间的流量迅速切换到CR-LSP 2进行转发。
图3 BFD检测MPLS TE配置组网图
表3 适用产品及版本
|
产品 |
软件版本 |
|
S6850系列 S9850系列 |
Release 6555P01 |
|
S9820-64H |
Release 6555P01 |
· 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。
· OSPF TE使用Opaque Type 10 LSA携带链路的TE属性信息，因此，配置OSPF TE时必须先使能OSPF的Opaque能力。有关OSPF Opaque能力的介绍请参见“三层技术-IP路由配置指导”中的“OSPF”。
· 由于MPLS TE无法在OSPF虚连接上预留资源和分配标签，即MPLS TE无法通过OSPF虚连接建立CRLSP隧道。因此，配置OSPF TE时，OSPF路由域内不能存在虚连接。
(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 hundredgige 1/0/3
[SwitchA-vlan10] quit
[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] ip address 192.168.10.1 24
[SwitchA] vlan 12
[SwitchA-vlan12] port hundredgige 1/0/1
[SwitchA-vlan12] quit
[SwitchA] interface vlan-interface 12
[SwitchA-Vlan-interface12] ip address 12.12.12.1 24
[SwitchA-Vlan-interface12] quit
[SwitchA] vlan 14
[SwitchA-vlan14] port hundredgige 1/0/2
[SwitchA-vlan14] quit
[SwitchA] interface vlan-interface 14
[SwitchA-Vlan-interface14] ip address 14.14.14.1 24
[SwitchA-Vlan-interface14] quit
[SwitchA] interface loopback 0
[SwitchA-LoopBack0] ip address 1.1.1.1 32
[SwitchA-LoopBack0] quit
(2) 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 12
[SwitchA-Vlan-interface12] mpls enable
[SwitchA-Vlan-interface12] mpls te enable
[SwitchA-Vlan-interface12] rsvp enable
[SwitchA-Vlan-interface12] quit
[SwitchA] interface vlan-interface 14
[SwitchA-Vlan-interface14] mpls enable
[SwitchA-Vlan-interface14] mpls te enable
[SwitchA-Vlan-interface14] rsvp enable
[SwitchA-Vlan-interface14] quit
# Switch B、Switch C和Switch D的配置与Switch A相似，此处不再赘述，具体请参见配置文件。
(3) 在MPLS骨干网内配置OSPF，以保证各路由器之间路由可达,并使能OSPF的Opaque LSA发布接收能力，在OSPF区域0使能MPLS TE能力
# 配置Switch A。
[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] network 1.1.1.1 0.0.0.0
[SwitchA-ospf-1-area-0.0.0.0] network 12.12.12.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 14.14.14.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 192.168.10.0 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] 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] network 2.2.2.2 0.0.0.0
[SwitchB-ospf-1-area-0.0.0.0] network 12.12.12.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 23.23.23.0 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] 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] network 3.3.3.3 0.0.0.0
[SwitchC ospf-1-area-0.0.0.0] network 23.23.23.0 0.0.0.255
[SwitchC ospf-1-area-0.0.0.0] network 34.34.34..0 0.0.0.255
[SwitchC ospf-1-area-0.0.0.0] network 192.168.20.0 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] 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] network 4.4.4.4 0.0.0.0
[SwitchD-ospf-1-area-0.0.0.0] network 14.14.14.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.0] network 34.34.34.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.0] quit
[SwitchD-ospf-1] quit
(4) 配置MPLS TE隧道
# 在Switch A上配置MPLS TE隧道Tunnel3：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；隧道支持CRLSP热备份功能。
[SwitchA] interface tunnel 3 mode mpls-te
[SwitchA-Tunnel3] ip address 9.1.1.1 255.255.255.0
[SwitchA-Tunnel3] destination 3.3.3.3
[SwitchA-Tunnel3] mpls te signaling rsvp-te
[SwitchA-Tunnel3] mpls te backup hot-standby
[SwitchA-Tunnel3] quit
# 创建隧道的显式路径，设置CR-LSP 1优先级为1，作为主CR-LSP，CR-LSP 2优先级为2，作为备份CR-LSP。
[SwitchA] explicit-path cr-lsp1
[SwitchA-explicit-path-cr-lsp1] nexthop 12.12.12.2
[SwitchA-explicit-path-cr-lsp1] quit
[SwitchA] explicit-path cr-lsp2
[SwitchA-explicit-path-cr-lsp2] nexthop 14.14.14.4
[SwitchA-explicit-path-cr-lsp2]quit
[SwitchA] interface tunnel 3
[SwitchA-Tunnel3] mpls te path preference 1 explicit-path cr-lsp1
[SwitchA-Tunnel3] mpls te path preference 2 explicit-path cr-lsp2
[SwitchA-Tunnel3] quit
# 在Switch C上配置MPLS TE隧道Tunnel3：目的地址为Switch A的LSR ID（1.1.1.1）；采用RSVP-TE信令协议建立MPLS TE隧道；隧道支持CRLSP热备份功能。
[SwitchC] interface tunnel 3 mode mpls-te
[SwitchC-Tunnel3] ip address 9.3.3.3 255.255.255.0
[SwitchC-Tunnel3] destination 1.1.1.1
[SwitchC-Tunnel3] mpls te signaling rsvp-te
[SwitchC-Tunnel3] mpls te backup hot-standby
[SwitchC-Tunnel3] quit
# 创建隧道的显式路径，设置CR-LSP 1优先级为1，作为主CR-LSP，CR-LSP 2优先级为2，作为备份CR-LSP。
[SwitchC] explicit-path cr-lsp1
[SwitchC-explicit-path-cr-lsp1] nexthop 23.23.23.2
[SwitchC-explicit-path-cr-lsp1] quit
[SwitchC] explicit-path cr-lsp2
[SwitchC-explicit-path-cr-lsp2] nexthop 34.34.34.4
[SwitchC-explicit-path-cr-lsp2]quit
[SwitchC] interface tunnel 3
[SwitchC-Tunnel3] mpls te path preference 1 explicit-path cr-lsp1
[SwitchC-Tunnel3] mpls te path preference 2 explicit-path cr-lsp2
[SwitchC-Tunnel3] quit
(5) 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192.168.20.0/24的流量通过MPLS TE隧道接口Tunnel3转发。
[SwitchA] ip route-static 192.168.20.0 24 tunnel 3 preference 1
# 在Switch C上配置静态路由，使得到达网络192.168.10.0/24的流量通过MPLS TE隧道接口Tunnel3转发。
[SwitchC] ip route-static 192.168.10.0 24 tunnel 3 preference 1
(6) 使能MPLS与BFD联动功能，并配置通过BFD检测TE隧道的连通性
# 配置Switch A。
[SwitchA] mpls bfd enable
[SwitchA] interface tunnel 3
[SwitchA-Tunnel3] mpls bfd
[SwitchA-Tunnel3] quit
# 配置Switch C。
[SwitchC] mpls bfd enable
[SwitchC] interface tunnel 3
[SwitchC-Tunnel3] mpls bfd
[SwitchC-Tunnel3] quit
(1) 配置完成后，查看MPLS TE隧道是否成功建立。
# 在Switch A上执行display mpls te tunnel-interface命令，可以看到Tunnel3的状态为up，且主备两条CR-LSP已经成功建立，备份方式为热备份。
[SwitchA] display mpls te tunnel-interface
Tunnel Name : Tunnel 3
Tunnel State : Up (Main CRLSP up, Backup CRLSP up)
Tunnel Attributes :
LSP ID : 37161 Tunnel ID : 3
Admin State : Normal
Ingress LSR ID : 1.1.1.1 Egress LSR ID : 3.3.3.3
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 : 0 kbps
Reserved Bandwidth : 0 kbps
Setup Priority : 7 Holding Priority : 7
Affinity Attr/Mask : 0/0
Explicit Path : cr-lsp1
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 : Hot Standby Backup LSP ID : 37162
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
# 在Switch A上执行display rsvp lsp verbose命令，可以看到主备两条CR-LSP的详细信息。主用CR-LSP使用的出接口为Vlan-interface12，下一跳为12.12.12.2；备用CR-LSP使用的出接口为Vlan-interface14，下一跳为14.14.14.4。
[SwitchA] display rsvp lsp destination 3.3.3.3 verbose
Tunnel name: Tunnel3
Destination: 3.3.3.3 Source: 1.1.1.1
Tunnel ID: 3 LSP ID: 37161
LSR type: Ingress Direction: Unidirectional
Setup priority: 7 Holding priority: 7
In-Label: - Out-Label: 1149
In-Interface: - Out-Interface: Vlan12
Nexthop: 12.12.12.2 Exclude-any: 0
Include-Any: 0 Include-all: 0
Mean rate (CIR): 0 kbps Mean burst size (CBS): 1000.00 bytes
Path MTU: 1500 Class type: CT0
RRO number: 6
12.12.12.1/32 Flag: 0x00 (No FRR)
12.12.12.2/32 Flag: 0x00 (No FRR)
2.2.2.2/32 Flag: 0x20 (No FRR/Node-ID)
23.23.23.2/32 Flag: 0x00 (No FRR)
23.23.23.3/32 Flag: 0x00 (No FRR)
3.3.3.3/32 Flag: 0x20 (No FRR/Node-ID)
Fast Reroute protection: None
Tunnel name: Tunnel3
Destination: 3.3.3.3 Source: 1.1.1.1
Tunnel ID: 3 LSP ID: 37162
LSR type: Ingress Direction: Unidirectional
Setup priority: 7 Holding priority: 7
In-Label: - Out-Label: 1149
In-Interface: - Out-Interface: Vlan14
Nexthop: 14.14.14.4 Exclude-any: 0
Include-Any: 0 Include-all: 0
Mean rate (CIR): 0 kbps Mean burst size (CBS): 1000.00 bytes
Path MTU: 1500 Class type: CT0
RRO number: 6
14.14.14.1/32 Flag: 0x00 (No FRR)
14.14.14.4/32 Flag: 0x00 (No FRR)
4.4.4.4/32 Flag: 0x20 (No FRR/Node-ID)
34.34.34.4/32 Flag: 0x00 (No FRR)
34.34.34.3/32 Flag: 0x00 (No FRR)
3.3.3.3/32 Flag: 0x20 (No FRR/Node-ID)
Fast Reroute protection: None
(2) 查看MPLS TE隧道的BFD检测信息
# 使用display mpls bfd命令查看到2条MPLS TE隧道的BFD检测信息，均为UP，以Switch A为例。
[SwitchA] display mpls bfd te tunnel 3
Total number of sessions: 2, 2 up, 0 down, 0 init
FEC Type: TE Tunnel
FEC Info:
Send Addr: 1.1.1.1
End Addr: 3.3.3.3
Tunnel ID: 3
LSP ID : 37161
NHLFE ID: 1029
Local Discr: 34 Remote Discr: 33
Source IP: 1.1.1.1 Destination IP: 127.0.0.1
Session State: Up Session Role: Passive
Template Name: -
FEC Type: TE Tunnel
FEC Info:
Send Addr: 1.1.1.1
End Addr: 3.3.3.3
Tunnel ID: 3
LSP ID : 37162
NHLFE ID: 1031
Local Discr: 33 Remote Discr: 36
Source IP: 1.1.1.1 Destination IP: 127.0.0.4
Session State: Up Session Role: Passive
Template Name: -
(3) 将Switch B的Vlan-interface23接口shutdown，再次查看MPLS TE隧道建立情况及BFD检测信息。
# 关闭Switch B的Vlan-interface23接口。
[SwitchB] interface vlan-interface 23
[SwitchB-Vlan-interface23] shutdown
# 在Switch A上执行display mpls te tunnel-interface命令，可以看到主用CR-LSP down，备用CR-LSP up。
[SwitchA] display mpls te tunnel-interface
Tunnel Name : Tunnel 3
Tunnel State : Up (Main CRLSP down, Backup CRLSP up)
Tunnel Attributes :
LSP ID : 0 Tunnel ID : 3
Admin State : Normal
Ingress LSR ID : - Egress LSR ID : 3.3.3.3
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 : 0 kbps
Reserved Bandwidth : 0 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 : Hot Standby Backup LSP ID : 37162
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
# 使用display mpls bfd查看到MPLS TE隧道CR-LSP2的BFD检测信息，以Switch A为例。
[SwitchA] display mpls bfd te tunnel 3
Total number of sessions: 1, 1 up, 0 down, 0 init
FEC Type: TE Tunnel
FEC Info:
Send Addr: 1.1.1.1
End Addr: 3.3.3.3
Tunnel ID: 3
LSP ID : 37162
NHLFE ID: 1031
Local Discr: 33 Remote Discr: 36
Source IP: 1.1.1.1 Destination IP: 127.0.0.4
Session State: Up Session Role: Passive
Template Name: -
(4) 将Switch B的Vlan-interface23接口undo shutdown，再次查看MPLS TE隧道建立情况。
# 开启Switch B的Vlan-interface23接口。
[SwitchB] interface vlan-interface 23
[SwitchB-Vlan-interface23] undo shutdown
# 在Switch A上使用display mpls te tunnel-interface命令，可以看到主用CR-LSP已经自动恢复。
[SwitchA] display mpls te tunnel-interface
Tunnel Name : Tunnel 3
Tunnel State : Up (Main CRLSP up, Backup CRLSP up)
Tunnel Attributes :
LSP ID : 37177 Tunnel ID : 3
Admin State : Normal
Ingress LSR ID : 1.1.1.1 Egress LSR ID : 3.3.3.3
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 : 0 kbps
Reserved Bandwidth : 0 kbps
Setup Priority : 7 Holding Priority : 7
Affinity Attr/Mask : 0/0
Explicit Path : cr-lsp1
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 : Hot Standby Backup LSP ID : 37178
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
· Switch A
#
ospf 1
area 0.0.0.0
network 1.1.1.1 0.0.0.0
network 12.12.12.0 0.0.0.255
network 14.14.14.0 0.0.0.255
network 192.168.10.0 0.0.0.255
mpls te enable
#
mpls lsr-id 1.1.1.1
#
vlan 10
#
vlan 12
#
vlan 14
#
mpls te
#
explicit-path cr-lsp1
nexthop index 1 12.12.12.2 include strict
#
explicit-path cr-lsp2
nexthop index 1 14.14.14.4 include strict
#
rsvp
#
mpls bfd enable
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
#
interface Vlan-interface10
ip address 192.168.10.1 255.255.255.0
#
interface Vlan-interface12
ip address 12.12.12.1 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface Vlan-interface14
ip address 14.14.14.1 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 12
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 14
#
interface HundredGigE1/0/3
port link-mode bridge
port access vlan 10
#
interface Tunnel3 mode mpls-te
ip address 9.1.1.1 255.255.255.0
mpls te path preference 1 explicit-path cr-lsp1
mpls te path preference 2 explicit-path cr-lsp2
mpls te backup hot-standby
mpls bfd
destination 3.3.3.3
#
ip route-static 192.168.20.0 24 Tunnel3 preference 1
#
· Switch B
#
ospf 1
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 12.12.12.0 0.0.0.255
network 23.23.23.0 0.0.0.255
mpls te enable
#
mpls lsr-id 2.2.2.2
#
vlan 12
#
vlan 23
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
#
interface Vlan-interface12
ip address 12.12.12.2 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface Vlan-interface23
ip address 23.23.23.2 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 12
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 23
#
· Switch C
#
ospf 1
area 0.0.0.0
network 3.3.3.3 0.0.0.0
network 23.23.23.0 0.0.0.255
network 34.34.34.0 0.0.0.255
network 192.168.20.0 0.0.0.255
mpls te enable
#
mpls lsr-id 3.3.3.3
#
vlan 23
#
vlan 30
#
vlan 34
#
mpls te
#
explicit-path cr-lsp1
nexthop index 1 23.23.23.2 include strict
#
explicit-path cr-lsp2
nexthop index 1 34.34.34.4 include strict
#
rsvp
#
mpls bfd enable
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.255
#
interface Vlan-interface23
ip address 23.23.23.3 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface Vlan-interface30
ip address 192.168.20.1 255.255.255.0
#
interface Vlan-interface34
ip address 34.34.34.3 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 34
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 23
#
interface HundredGigE1/0/3
port link-mode bridge
port access vlan 30
#
interface Tunnel3 mode mpls-te
ip address 9.3.3.3 255.255.255.0
mpls te path preference 1 explicit-path cr-lsp1
mpls te path preference 2 explicit-path cr-lsp2
mpls te backup hot-standby
mpls bfd
destination 1.1.1.1
#
ip route-static 192.168.10.0 24 Tunnel3 preference 1
#
· Switch D
#
ospf 1
area 0.0.0.0
network 4.4.4.4 0.0.0.0
network 14.14.14.0 0.0.0.255
network 34.34.34.0 0.0.0.255
mpls te enable
#
mpls lsr-id 4.4.4.4
#
vlan 14
#
vlan 34
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.255
#
interface Vlan-interface14
ip address 14.14.14.4 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface Vlan-interface34
ip address 34.34.34.4 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 34
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 14
#
如图4所示，某公司有两个位于不同的地理位置的分支机构通过MPLS TE隧道实现互联，两个分支机构之间需要进行实时业务的同步传输。该公司要求运营商提供高可靠性的服务，以保证实时业务的不间断性。
为满足该用户需求，可通过部署CRLSP备份服务来提供主备两条CRLSP链路，并使用SBFD检测MPLS TE技术提高主备CR-LSP的切换速度，具体实现如下：
· 正常情况下，使用CR-LSP 1作为主CR-LSP，负责转发Router A和Router C之间的流量。
· 使用SBFD对主CR-LSP进行监测，当主CR-LSP发生故障时，SBFD能够快速感知并通告RSVP协议，使得Router A和Router C之间的流量迅速切换到CR-LSP 2进行转发。
图4 BFD检测MPLS TE配置组网图
表4 适用产品及版本
|
产品 |
软件版本 |
|
S6850系列 S9850系列 |
Release 6555P01 |
|
S9820-64H |
Release 6555P01 |
· 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。
· OSPF TE使用Opaque Type 10 LSA携带链路的TE属性信息，因此，配置OSPF TE时必须先使能OSPF的Opaque能力。有关OSPF Opaque能力的介绍请参见“三层技术-IP路由配置指导”中的“OSPF”。
· 由于MPLS TE无法在OSPF虚连接上预留资源和分配标签，即MPLS TE无法通过OSPF虚连接建立CRLSP隧道。因此，配置OSPF TE时，OSPF路由域内不能存在虚连接。
(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 10
[SwitchA-vlan10] port hundredgige 1/0/3
[SwitchA-vlan10] quit
[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] ip address 192.168.10.1 24
[SwitchA] vlan 12
[SwitchA-vlan12] port hundredgige 1/0/1
[SwitchA-vlan12] quit
[SwitchA] interface vlan-interface 12
[SwitchA-Vlan-interface12] ip address 12.12.12.1 24
[SwitchA-Vlan-interface12] quit
[SwitchA] vlan 14
[SwitchA-vlan14] port hundredgige 1/0/2
[SwitchA-vlan14] quit
[SwitchA] interface vlan-interface 14
[SwitchA-Vlan-interface14] ip address 14.14.14.1 24
[SwitchA-Vlan-interface14] quit
[SwitchA] interface loopback 0
[SwitchA-LoopBack0] ip address 1.1.1.1 32
[SwitchA-LoopBack0] quit
(2) 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 12
[SwitchA-Vlan-interface12] mpls enable
[SwitchA-Vlan-interface12] mpls te enable
[SwitchA-Vlan-interface12] rsvp enable
[SwitchA-Vlan-interface12] quit
[SwitchA] interface vlan-interface 14
[SwitchA-Vlan-interface14] mpls enable
[SwitchA-Vlan-interface14] mpls te enable
[SwitchA-Vlan-interface14] rsvp enable
[SwitchA-Vlan-interface14] quit
# Switch B、Switch C和Switch D的配置与Switch A相似，此处不再赘述，具体请参见配置文件。
(3) 在MPLS骨干网内配置OSPF，以保证各路由器之间路由可达,并使能OSPF的Opaque LSA发布接收能力，在OSPF区域0使能MPLS TE能力
# 配置Switch A。
[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] network 1.1.1.1 0.0.0.0
[SwitchA-ospf-1-area-0.0.0.0] network 12.12.12.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 14.14.14.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 192.168.10.0 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] 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] network 2.2.2.2 0.0.0.0
[SwitchB-ospf-1-area-0.0.0.0] network 12.12.12.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 23.23.23.0 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] 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] network 3.3.3.3 0.0.0.0
[SwitchC ospf-1-area-0.0.0.0] network 23.23.23.0 0.0.0.255
[SwitchC ospf-1-area-0.0.0.0] network 34.34.34..0 0.0.0.255
[SwitchC ospf-1-area-0.0.0.0] network 192.168.20.0 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] 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] network 4.4.4.4 0.0.0.0
[SwitchD-ospf-1-area-0.0.0.0] network 14.14.14.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.0] network 34.34.34.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.0] quit
[SwitchD-ospf-1] quit
(4) 配置MPLS TE隧道
# 在Switch A上配置MPLS TE隧道Tunnel3：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；隧道支持CRLSP热备份功能。
[SwitchA] interface tunnel 3 mode mpls-te
[SwitchA-Tunnel3] ip address 9.1.1.1 255.255.255.0
[SwitchA-Tunnel3] destination 3.3.3.3
[SwitchA-Tunnel3] mpls te signaling rsvp-te
[SwitchA-Tunnel3] mpls te backup hot-standby
[SwitchA-Tunnel3] quit
# 创建隧道的显式路径，设置CR-LSP 1优先级为1，作为主CR-LSP，CR-LSP 2优先级为2，作为备份CR-LSP。
[SwitchA] explicit-path cr-lsp1
[SwitchA-explicit-path-cr-lsp1] nexthop 12.12.12.2
[SwitchA-explicit-path-cr-lsp1] quit
[SwitchA] explicit-path cr-lsp2
[SwitchA-explicit-path-cr-lsp2] nexthop 14.14.14.4
[SwitchA-explicit-path-cr-lsp2]quit
[SwitchA] interface tunnel 3
[SwitchA-Tunnel3] mpls te path preference 1 explicit-path cr-lsp1
[SwitchA-Tunnel3] mpls te path preference 2 explicit-path cr-lsp2
[SwitchA-Tunnel3] quit
# 在Switch C上配置MPLS TE隧道Tunnel3：目的地址为Switch A的LSR ID（1.1.1.1）；采用RSVP-TE信令协议建立MPLS TE隧道；隧道支持CRLSP热备份功能。
[SwitchC] interface tunnel 3 mode mpls-te
[SwitchC-Tunnel3] ip address 9.3.3.3 255.255.255.0
[SwitchC-Tunnel3] destination 1.1.1.1
[SwitchC-Tunnel3] mpls te signaling rsvp-te
[SwitchC-Tunnel3] mpls te backup hot-standby
[SwitchC-Tunnel3] quit
# 创建隧道的显式路径，设置CR-LSP 1优先级为1，作为主CR-LSP，CR-LSP 2优先级为2，作为备份CR-LSP。
[SwitchC] explicit-path cr-lsp1
[SwitchC-explicit-path-cr-lsp1] nexthop 23.23.23.2
[SwitchC-explicit-path-cr-lsp1] quit
[SwitchC] explicit-path cr-lsp2
[SwitchC-explicit-path-cr-lsp2] nexthop 34.34.34.4
[SwitchC-explicit-path-cr-lsp2]quit
[SwitchC] interface tunnel 3
[SwitchC-Tunnel3] mpls te path preference 1 explicit-path cr-lsp1
[SwitchC-Tunnel3] mpls te path preference 2 explicit-path cr-lsp2
[SwitchC-Tunnel3] quit
(5) 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192.168.20.0/24的流量通过MPLS TE隧道接口Tunnel3转发。
[SwitchA] ip route-static 192.168.20.0 24 tunnel 3 preference 1
# 在Switch C上配置静态路由，使得到达网络192.168.10.0/24的流量通过MPLS TE隧道接口Tunnel3转发。
[SwitchC] ip route-static 192.168.10.0 24 tunnel 3 preference 1
(6) 使能MPLS与BFD联动功能，并配置通过SBFD检测TE隧道的连通性
# 配置Switch A。
[SwitchA] mpls bfd enable
[SwitchA] sbfd local-discriminator 3000000
[SwitchA] interface tunnel 3
[SwitchA-Tunnel3] mpls sbfd remote 2000000
[SwitchA-Tunnel3] quit
# 配置Switch C。
[SwitchC] mpls bfd enable
[SwitchC] sbfd local-discriminator 2000000
[SwitchC] interface tunnel 3
[SwitchC-Tunnel3] mpls sbfd remote 3000000
[SwitchC-Tunnel3] quit
(1) 配置完成后，查看MPLS TE隧道是否成功建立。
# 在Switch A上执行display mpls te tunnel-interface命令，可以看到Tunnel3的状态为up，且主备两条CR-LSP已经成功建立，备份方式为热备份。
[SwitchA] display mpls te tunnel-interface
Tunnel Name : Tunnel 3
Tunnel State : Up (Main CRLSP up, Backup CRLSP up)
Tunnel Attributes :
LSP ID : 37161 Tunnel ID : 3
Admin State : Normal
Ingress LSR ID : 1.1.1.1 Egress LSR ID : 3.3.3.3
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 : 0 kbps
Reserved Bandwidth : 0 kbps
Setup Priority : 7 Holding Priority : 7
Affinity Attr/Mask : 0/0
Explicit Path : cr-lsp1
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 : Hot Standby Backup LSP ID : 37162
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
# 在Switch A上执行display rsvp lsp verbose命令，可以看到主备两条CR-LSP的详细信息。主用CR-LSP使用的出接口为Vlan-interface12，下一跳为12.12.12.2；备用CR-LSP使用的出接口为Vlan-interface14，下一跳为14.14.14.4。
[SwitchA] display rsvp lsp destination 3.3.3.3 verbose
Tunnel name: Tunnel3
Destination: 3.3.3.3 Source: 1.1.1.1
Tunnel ID: 3 LSP ID: 37161
LSR type: Ingress Direction: Unidirectional
Setup priority: 7 Holding priority: 7
In-Label: - Out-Label: 1149
In-Interface: - Out-Interface: Vlan12
Nexthop: 12.12.12.2 Exclude-any: 0
Include-Any: 0 Include-all: 0
Mean rate (CIR): 0 kbps Mean burst size (CBS): 1000.00 bytes
Path MTU: 1500 Class type: CT0
RRO number: 6
12.12.12.1/32 Flag: 0x00 (No FRR)
12.12.12.2/32 Flag: 0x00 (No FRR)
2.2.2.2/32 Flag: 0x20 (No FRR/Node-ID)
23.23.23.2/32 Flag: 0x00 (No FRR)
23.23.23.3/32 Flag: 0x00 (No FRR)
3.3.3.3/32 Flag: 0x20 (No FRR/Node-ID)
Fast Reroute protection: None
Tunnel name: Tunnel3
Destination: 3.3.3.3 Source: 1.1.1.1
Tunnel ID: 3 LSP ID: 37162
LSR type: Ingress Direction: Unidirectional
Setup priority: 7 Holding priority: 7
In-Label: - Out-Label: 1149
In-Interface: - Out-Interface: Vlan14
Nexthop: 14.14.14.4 Exclude-any: 0
Include-Any: 0 Include-all: 0
Mean rate (CIR): 0 kbps Mean burst size (CBS): 1000.00 bytes
Path MTU: 1500 Class type: CT0
RRO number: 6
14.14.14.1/32 Flag: 0x00 (No FRR)
14.14.14.4/32 Flag: 0x00 (No FRR)
4.4.4.4/32 Flag: 0x20 (No FRR/Node-ID)
34.34.34.4/32 Flag: 0x00 (No FRR)
34.34.34.3/32 Flag: 0x00 (No FRR)
3.3.3.3/32 Flag: 0x20 (No FRR/Node-ID)
Fast Reroute protection: None
(2) 查看MPLS TE隧道的BFD检测信息
# 使用display mpls sbfd命令查看到2条MPLS TE隧道的BFD检测信息，均为UP，以Switch A为例。
[SwitchA] display mpls sbfd te tunnel 3
Total number of sessions: 2, 2 up, 0 down, 0 init
FEC Type: TE Tunnel
FEC Info:
Source : 1.1.1.1
Destination: 3.3.3.3
Tunnel ID : 3
LSP ID : 24346
NHLFE ID: 6
Local Discr: 513 Remote Discr: 2000000
Source IP: 1.1.1.1 Destination IP: 127.0.0.1
Session State: Up
Template Name: -
FEC Type: TE Tunnel
FEC Info:
Source : 1.1.1.1
Destination: 3.3.3.3
Tunnel ID : 3
LSP ID : 24347
NHLFE ID: 8
Local Discr: 514 Remote Discr: 2000000
Source IP: 1.1.1.1 Destination IP: 127.0.0.2
Session State: Up
Template Name: -
(3) 将Switch B的Vlan-interface23接口shutdown，再次查看MPLS TE隧道建立情况及BFD检测信息。
# 关闭Switch B的Vlan-interface23接口。
[SwitchB] interface vlan-interface 23
[SwitchB-Vlan-interface23] shutdown
# 在Switch A上执行display mpls te tunnel-interface命令，可以看到主用CR-LSP down，备用CR-LSP up。
[SwitchA] display mpls te tunnel-interface
Tunnel Name : Tunnel 3
Tunnel State : Up (Main CRLSP down, Backup CRLSP up)
Tunnel Attributes :
LSP ID : 0 Tunnel ID : 3
Admin State : Normal
Ingress LSR ID : - Egress LSR ID : 3.3.3.3
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 : 0 kbps
Reserved Bandwidth : 0 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 : Hot Standby Backup LSP ID : 37162
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
# 使用display mpls sbfd查看到MPLS TE隧道CR-LSP2的BFD检测信息，以Switch A为例。
[SwitchA] display mpls sbfd te tunnel 3
Total number of sessions: 1, 1 up, 0 down, 0 init
FEC Type: TE Tunnel
FEC Info:
Source : 1.1.1.1
Destination: 3.3.3.3
Tunnel ID : 3
LSP ID : 24347
NHLFE ID: 8
Local Discr: 514 Remote Discr: 2000000
Source IP: 1.1.1.1 Destination IP: 127.0.0.2
Session State: Up
Template Name: -
(4) 将Switch B的Vlan-interface23接口undo shutdown，再次查看MPLS TE隧道建立情况。
# 开启Switch B的Vlan-interface23接口。
[SwitchB] interface vlan-interface 23
[SwitchB-Vlan-interface23] undo shutdown
# 在Switch A上使用display mpls te tunnel-interface命令，可以看到主用CR-LSP已经自动恢复。
<SwitchA> display mpls te tunnel-interface
Tunnel Name : Tunnel 3
Tunnel State : Up (Main CRLSP up, Backup CRLSP up)
Tunnel Attributes :
LSP ID : 37177 Tunnel ID : 3
Admin State : Normal
Ingress LSR ID : 1.1.1.1 Egress LSR ID : 3.3.3.3
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 : 0 kbps
Reserved Bandwidth : 0 kbps
Setup Priority : 7 Holding Priority : 7
Affinity Attr/Mask : 0/0
Explicit Path : cr-lsp1
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 : Hot Standby Backup LSP ID : 37178
Auto Bandwidth : Disabled Auto Bandwidth Freq : -
Min Bandwidth : - Max Bandwidth : -
Collected Bandwidth : -
· Switch A
#
sbfd local-discriminator 3000000
#
ospf 1
area 0.0.0.0
network 1.1.1.1 0.0.0.0
network 12.12.12.0 0.0.0.255
network 14.14.14.0 0.0.0.255
network 192.168.10.0 0.0.0.255
mpls te enable
#
mpls lsr-id 1.1.1.1
#
vlan 10
#
vlan 12
#
vlan 14
#
mpls te
#
explicit-path cr-lsp1
nexthop index 1 12.12.12.2 include strict
#
explicit-path cr-lsp2
nexthop index 1 14.14.14.4 include strict
#
rsvp
#
mpls bfd enable
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
#
interface Vlan-interface10
ip address 192.168.10.1 255.255.255.0
#
interface Vlan-interface12
ip address 12.12.12.1 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface Vlan-interface14
ip address 14.14.14.1 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 12
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 14
#
interface HundredGigE1/0/3
port link-mode bridge
port access vlan 10
#
interface Tunnel3 mode mpls-te
ip address 9.1.1.1 255.255.255.0
mpls te path preference 1 explicit-path cr-lsp1
mpls te path preference 2 explicit-path cr-lsp2
mpls te backup hot-standby
mpls sbfd remote 2000000
destination 3.3.3.3
#
ip route-static 192.168.20.0 24 Tunnel3 preference 1
#
· Switch B
#
ospf 1
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 12.12.12.0 0.0.0.255
network 23.23.23.0 0.0.0.255
mpls te enable
#
mpls lsr-id 2.2.2.2
#
vlan 12
#
vlan 23
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
#
interface Vlan-interface12
ip address 12.12.12.2 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface Vlan-interface23
ip address 23.23.23.2 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 12
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 23
#
· Switch C
#
sbfd local-discriminator 2000000
#
ospf 1
area 0.0.0.0
network 3.3.3.3 0.0.0.0
network 23.23.23.0 0.0.0.255
network 34.34.34.0 0.0.0.255
network 192.168.20.0 0.0.0.255
mpls te enable
#
mpls lsr-id 3.3.3.3
#
vlan 23
#
vlan 30
#
vlan 34
#
mpls te
#
explicit-path cr-lsp1
nexthop index 1 23.23.23.2 include strict
#
explicit-path cr-lsp2
nexthop index 1 34.34.34.4 include strict
#
rsvp
#
mpls bfd enable
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.255
#
interface Vlan-interface23
ip address 23.23.23.3 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface Vlan-interface30
ip address 192.168.20.1 255.255.255.0
#
interface Vlan-interface34
ip address 34.34.34.3 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 34
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 23
#
interface HundredGigE1/0/3
port link-mode bridge
port access vlan 30
#
interface Tunnel3 mode mpls-te
ip address 9.3.3.3 255.255.255.0
mpls te path preference 1 explicit-path cr-lsp1
mpls te path preference 2 explicit-path cr-lsp2
mpls te backup hot-standby
mpls sbfd remote 3000000
destination 1.1.1.1
#
ip route-static 192.168.10.0 24 Tunnel3 preference 1
#
· Switch D
#
ospf 1
area 0.0.0.0
network 4.4.4.4 0.0.0.0
network 14.14.14.0 0.0.0.255
network 34.34.34.0 0.0.0.255
mpls te enable
#
mpls lsr-id 4.4.4.4
#
vlan 14
#
vlan 34
#
mpls te
#
rsvp
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.255
#
interface Vlan-interface14
ip address 14.14.14.4 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface Vlan-interface34
ip address 34.34.34.4 255.255.255.0
mpls enable
mpls te enable
rsvp enable
#
interface HundredGigE1/0/1
port link-mode bridge
port access vlan 34
#
interface HundredGigE1/0/2
port link-mode bridge
port access vlan 14
#
· H3C S6850 & S9850系列以太网交换机 MPLS配置指导-Release 655x系列
· H3C S6850 & S9850系列以太网交换机 MPLS命令参考-Release 655x系列
· H3C S9820-64H交换机 MPLS配置指导-Release 655x系列
· H3C S9820-64H交换机 MPLS命令参考-Release 655x系列
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