Contents
Why do we need MP-BGP?
Multiprotocol BGP (MP-BGP) is an extension to BGP that enables BGP to carry routing information for multiple network layers and address families. MP-BGP can carry the unicast routes used for multicast routing separately from the routes used for unicast IP forwarding.
What is MBGP Cisco?
MBGP allows you to have a unicast routing topology different from a multicast routing topology. Thus, you have more control over your network and resources. Each router is unicast- and multicast-capable.
What is AFI Safi?
AFI means Address Family Indicator and SAFI is the Subsequent Address Family Indicator. They are used in the Multiprotocol Extensions to BGP and are exchanged during neighbor capability exchange during the process for loading the peers.
Is BGP unicast?
BGP multicasting (MBGP) is an extension of the BGP unicast routing protocol. The address families available are unicast IPv4, multicast IPv4, and VPN-IPv4. When you enable BGP, the router employs unicast IPv4 addresses by default.
What is address family in BGP?
The address-family <family> command defines BGP behavior for each specific supported case. The most common address families are ipv4 unicast and ipv6 unicast . The other possible choices supported in this version are ipv4 multicast and ipv6 multicast .
What kind of address families does mpbgp support?
Multi protocol BGP supports IPv4 and IPv6 address families and their unicast and multicast variants. MPBGP also supports Layer 2 VPN address families. EVPN (Ethernet VPN) is a mechanism which the mac addresses are exchanged between PE devices over BGP control plane.
What does MBGP stand for in Cisco IOS?
For IP multicast configuration information and examples, refer to the “IP Multicast” part of this document and Cisco IOS IP Command Reference, Volume 3 of 3: Multicast. MBGP is an en hance d BGP that carries routing information for multiple network layer protocols and IP multicast routes.
How to configure MBGP between two routers?
To configure MBGP between two routers, use the following commands beginning in global configuration mode: Configures a BGP routing process and places the router in router configuration mode. Adds the IP address of the neighbor in the remote autonomous system to the MBGP neighbor table of the local router.
What are the new features of MP-BGP?
For each different “address” type, MP-BGP uses a different address family. To allow these new addresses, MBGP has some new features that the old BGP doesn’t have: Address Family Identifier (AFI): specifies the address family. Subsequent Address Family Identifier (SAFI): Has additional information for some address families.