EIGRP in MPLS VPN networks - nil.com

EIGRP in MPLS VPN networks
Support for EIGRP as a PE-CE routing protocol in MPLS VPN environment has been introduced in Cisco IOS releases 12.2(15)T, 12.3, 12.0(22)S and 12.2(18)S. The basic configuration for simple VPNs having sites with a single PE-CE link is very simple:

• EIGRP routing process is configured for the desired VRF.
• Two-way redistribution between PE-CE EIGRP and core BGP is configured within the VRF address family.

EIGRP routes redistributed from VRF address family into VPNv4 BGP carry EIGRP-specific extended communities that transport EIGRP route attributes (metric vector, route type and AS number) across core BGP. Routes sourced by EIGRP in one site are thus redistributed as internal EIGRP routes with proper vector and composite metric into EIGRP running on other sites.