You are a network engineer of a company that provides MPLS services to more customers. As shown below, Customer ABC has 2 offices running EIGRP with PE routers in both locations. Inside the MPLS core, you run OSPF and MP-BGP between PE routers and everything runs smoothly.
In order to increase the redundancy of the CORE network, your team desides to add a new link between PE-1 (Fa0/1) and P-4 (Fa0/0) routers.
You finish the change and you verify that the OSPF on the new link is established. You're also happy with the OSPF routing after the MPLS Core converges (for info: all links are equal cost). You also double-check-ed that the routing table for vrf VPNA did not change on both PE routers (it is same as in above picture).
sh ip osp neiNeighbor ID Pri State Dead Time Address Interface 126.96.36.199 1 FULL/DR 00:00:33 10.0.0.9 FastEthernet0/1 188.8.131.52 1 FULL/DR 00:00:36 10.0.0.1 FastEthernet0/0 PE-1#
Soon after your change, you receive a ticket in which customer complains that connectivity between the two office is down:
CE-2#ping 192.168.1.1 Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
..... Success rate is 0 percent (0/5)CE-2#
What could be the wrong ?
Post your solution in the ‘Comments’ section below and subscribe to this blog to get the solution and more interesting quizzes.