EIGRP as PE CPE Routing Protocol

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.

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