PE-CE Communication via EIGRP
Problem
You want to use EIGRP to exchange routing information between your CE and PE routers.
Solution
The solution to this problem is similar to the RIP solution in Recipe 26.5 and the OSPF solution in Recipe 26.6. First we have to enable the routing protocol on the CE routers, which we do in the usual way:
Router-CE-A1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z. Router-CE-A1(config)#router eigrp
Router-CE-A1(config-router)#
156
network
Router-CE-A1(config-router)#
192.168.1.0
network
Router-CE-A1(config-router)#
192.168.5.0
no auto-summary
Router-CE-A1(config-router)#end
Router-CE-A1#
We have disabled EIGRP autosummarization because, for the clarity of the example, we want to see all of the subnets. The other CE router’s configuration is similar:
Router-CE-A2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z. Router-CE-A2(config)#router eigrp
Router-CE-A2(config-router)#
156
network
Router-CE-A2(config-router)#
10.0.0.0
network
Router-CE-A2(config-router)#
192.168.3.0
no auto-summary
Router-CE-A2(config-router)#end
Router-CE-A2#
And then we must configure the PE routers to take part in EIGRP for this VRF:
Router-PE1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z. Router-PE1(config)#router eigrp
Router-PE1(config-router)#
1001
no auto-summary
Router-PE1(config-router)#address-family ipv4 vrf
Router-PE1(config-router-af)#
NetworkA
redistribute bgp
100
metric
10000 10 255 ...
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