Cisco has support EIGRP as PE CPE routing protocol in MPLS VPN. It is just like another routing protocol using for PE CPE roituing protocol. The mechanism is common. EIGRP in PE talk with EIGRP in CPE to exchange routing, then routing receive from CPE is redistribute to MP BGP (multi protocol BGP) running under address family configuration. EIGRP receive all VPN routing from reditributing form MP BGP (multi protocol BGP) running under address family configuration.
Example Configuration
BGP Configuration
router bgp 65000
no syncronization
neighbor 10.10.10.1 remote-as 65000
neighbor 10.10.10.1 update-source loopback0
address-family vpnv4
neighbor 10.10.10.1 activate
neighbor 10.10.10.1 send-community extended
exit-address-family
address-family ipv4 vrf TEST
reditribute eigrp 100
no syncronization
exit-address-family
EIGRP Configuration
router eigrp 1
address-family ipv4 vrf TEST
network 192.168.1.0 0.0.0.255
reditribute bgp 65000 metric 10000 100 255 1 1500
autonomous-system 100
exit address-family
EIGRP 100, EIGRP autonomus system running between PE and CPE, is reditribute into BGP so that the routing from PCE receive by EIGRP can be send across MPLS network and receive by another PE. Also, routing form BGP AS 65000 is reditribute into EIGRP, so that it can send to CPE through EIGRP 100. Autonomous system in EIGRP is that autonomous system running in CPE router.
Configuring RIP for routing protocol between PE and CPE on MPLS VPN cover three steps.
1. Configure RIP on CPE
2. Configure RIP on address-family level on MPLS PE
3. Redistribute RIP to BGP vice versa on MPLS PE
Configure RIP on CPE.
Cpe(config)#router rip
Cpe(config-router)#version 2
Cpe(config-router)#network 10.0.0.0
Configure RIP on MPLS PE.
Pe(config)#router rip
Pe(config-router)#version 2
Pe(config-router)#address-family ipv4 vrf NETWORKING-PARTNER
Pe(config-router-af)#network 10.0.0.0
Reditribute BGP into MP BGP so that routing from another PE can be sent to CPE.
Pe(config-router-af)#redistribute bgp 65000 metric 1
Redistributing RIP into MP BGP so that routing from CPE can be sent to another PE.
Pe(config)#router bgp 65000
Pe(config-router)#address-family ipv4 vrf NETWORKING-PARTNER
Pe(config-router-af)#redistributing rip