Troubleshooting guide

8-21
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 8 Troubleshooting Tag and MPLS Switching Connections
Troubleshooting MPLS Connections
Routing Information Sources:
Gateway Distance Last Update
222.2.1.1 110 01:35:09
222.2.1.3 110 01:35:09
222.2.1.2 110 01:35:09
Distance: (default is 110)
Routing Protocol is "bgp 222"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
IGP synchronization is disabled
Automatic route summarization is enabled
Redistributing: connected
Maximum path: 1
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: external 20 internal 200 local 200
8540-PE1#
Step 2 Check the Routing for Networks field to verify the correct networks are configured and present. If they
are not, reconfigure the network protocol.
Step 3 Check the Routing Information Sources field to see whether the correct neighbors are present in the
table. The neighbors are the routing sources the Cisco IOS software uses to build its routing table. If the
correct neighbor is not included, verify the interfaces are up and configured correctly.
Step 4 Enter the show ip route command to confirm the IP route addresses are in the routing table.
8540-P# show ip route
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
171.69.0.0/24 is subnetted, 1 subnets
S 171.69.1.0 is directly connected, Ethernet0
222.2.1.0/32 is subnetted, 3 subnets
C 222.2.1.1 is directly connected, Loopback0
O 222.2.1.3 [110/2] via 111.0.1.2, 01:35:51, FastEthernet11/0/1
O 222.2.1.2 [110/3] via 111.0.1.2, 01:35:51, FastEthernet11/0/1
172.20.0.0/24 is subnetted, 1 subnets
C 172.20.42.0 is directly connected, Ethernet0
111.0.0.0/30 is subnetted, 2 subnets
C 111.0.1.0 is directly connected, FastEthernet11/0/1
O 111.0.1.16 [110/2] via 111.0.1.2, 01:35:52, FastEthernet11/0/1
Step 5 Verify the router(s) or route(s) are listed in the display. If they are not, check the routing protocol
configuration.