Answered Question
May 29th, 2007

What is difference between BGP and MP-BGP? and what is the exact application of both?

I have this problem too.
1 vote
Correct Answer by Harold Ritter about 9 years 4 months ago

Right. But it goes without saying that this enhancement brings a lot to the table.

Hope this helps,

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Overall Rating: 4.5 (2 ratings)
Harold Ritter Tue, 05/29/2007 - 07:26

Originally, BGP only supported IPv4 unicast prefixes. It was later extended to support other protocols such as IPv4 multicast, VPNv4 (for MPLS VPN) and IPv6, just to name a few.

This extension is referred to as Multiprotocol BGP (or MP-BGP) and was specified and documented in RFC2283.

Please refer to RFC 2283 for more information.

Hope this helps,

dangal.43 Tue, 05/29/2007 - 07:48

so there is only the feature enhancement in BGP and that enhance version is called as MP-BGP right!!!

Correct Answer
Harold Ritter Tue, 05/29/2007 - 07:50

Right. But it goes without saying that this enhancement brings a lot to the table.

Hope this helps,

rizwan1989 Sun, 06/08/2014 - 09:25

Multiprotocol Extensions for BGP (MBGP), sometimes referred to as Multiprotocol BGP or Multicast BGP and defined in IETF RFC 4760, is an extension to Border Gateway Protocol that allows different types of addresses (known as address families) to be distributed in parallel. Whereas standard BGP supports only IPv4 unicast addresses, Multiprotocol BGP supports IPv4 and IPv6 addresses and it supports unicast and multicast variants of each. Multiprotocol BGP allows information about the topology of IP Multicast-capable routers to be exchanged separately from the topology of normal IPv4 unicast routers. Thus, it allows a multicast routing topology different from the unicast routing topology. Although MBGP enables the exchange of inter-domain multicast routing information, other protocols such as the Protocol Independent Multicast family are needed to build trees and forward multicast traffic.

Multiprotocol BGP is also widely deployed in case of MPLS L3 VPN, to exchange VPN labels learned for the routes from the customer sites over the MPLS network, in order to distinguish between different customer sites when the traffic from the other customer sites comes to the PE router for routing.


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