Which protocol is used for transferring VPNv4 routes between PE routers?

The correct answer is C. BGP. In Layer 3 MPLS VPN (RFC 4364), Multiprotocol BGP (MP-BGP) is used to exchange VPNv4 routes between PE (Provider Edge) routers across the MPLS backbone. PE routers establish MP-BGP sessions (typically iBGP) with each other or with Route Reflectors and use the VPNv4 address…

Advanced WAN Services

Question

Options

AOSPF
BEIGRP
CBGP
DRIP

How the community answered

(25 responses)

B
8% (2)
C
88% (22)
D
4% (1)

Explanation

In Layer 3 MPLS VPN (RFC 4364), Multiprotocol BGP (MP-BGP) is used to exchange VPNv4 routes between PE (Provider Edge) routers across the MPLS backbone. PE routers establish MP-BGP sessions (typically iBGP) with each other or with Route Reflectors and use the VPNv4 address family to carry customer routes along with their Route Distinguishers and Route Target extended communities. OSPF (A) and EIGRP (B) are IGP protocols used within the provider backbone or as PE-CE protocols, not for inter-PE VPN route exchange. RIP (D) is a legacy distance-vector protocol that plays no role in MPLS VPN control plane signaling between PEs.

Topics

#VPNv4#MP-BGP#PE routers#MPLS VPN

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