检验 本节讲述了如何检查你的配置是否工作正常. · show ip vrf - Verifies that the correct VRF exists. · show ip vrf interfaces - Verifies the activated interfaces. · show ip route vrf Customer_A - Verifies the routing information on the PE routers. · traceroute vrf Customer_A 200.0.6.1 - Verifies the routing information on the PE routers. · show ip bgp vpnv4 tag - Verifies the BGP. · show ip cef vrf Customer_A 200.0.6.1 detail - Verifies the routing information on the PE routers.
更多的排错命令详见: MPLS VPN Solution Troubleshooting Guide. 下面的输出是命令 show ip vrf 的结果 Pescara#show ip vrf Name Default RD Interfaces Customer_A 100:110 Loopback101 Customer_B 100:120 Loopback102
下面的输出是命令show ip vrf interfaces 的结果. Pesaro#show ip vrf interfaces Interface IP-Address VRF Protocol Loopback101 200.0.6.1 Customer_A up Loopback111 200.1.6.1 Customer_A up Loopback102 200.0.6.1 Customer_B up
下面的 show ip route vrf 命令的结果显示在2 个VPNl 里面都有相同的网段 200.0.6.0/24. 这是因为两个VPN客户 Customer_A 和Customer_B 使用了重叠的IP 地址.
Pescara#show ip route vrf Customer_A Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR
Gateway of last resort is not set C 200.0.4.0/24 is directly connected, Loopback101 B 200.0.6.0/24 [200/0] via 10.10.10.6, 05:10:11 B 200.1.6.0/24 [200/0] via 10.10.10.6, 04:48:11
Pescara#show ip route vrf Customer_B Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR P - periodic downloaded static route
Gateway of last resort is not set C 200.0.4.0/24 is directly connected, Loopback102 B 200.0.6.0/24 [200/0] via 10.10.10.6, 00:03:24
在Customer_A 的2 个站点间使用Traceroute,可能可以看到MPLS 网络使用的label stack。 (如果配置mpls ip ttl .) Pescara#traceroute vrf Customer_A 200.0.6.1 Type escape sequence to abort. Tracing the route to 200.0.6.1 1 10.1.1.13 [MPLS: Labels 20/26 Exp 0] 400 msec 276 msec 264 msec 2 10.1.1.6 [MPLS: Labels 18/26 Exp 0] 224 msec 460 msec 344 msec 3 200.0.6.1 108 msec * 100 msec Note: Exp 0 是QoS 使用的一个字段。
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