Address Family

[kmeraj]

Well KInda confused about the use of Address family?

what benefits we can have by using address-family for bgp?

[pkhatri]

Hi,

You need different address-families to enable BGP to carry information for different types of protocols. For example, if you need to use BGP for IPv6, then you would use the IPv6 address-family. There are other uses for the address-family as well:

- IPv4 multicast routes

- IPv6 unicast/multicast routes

- vpnv4 routes - used for layer 3 VPNs.

Pls do remember to rate posts.

Paresh

[globalnettech]

Hello Kajif,

the main reason the address family was added to BGP was in order to support newer technologies such as MPLS or IPv6.

Have a look at this explanation on CCO:

Cisco BGP Address Family Model

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hirp_c/ch05/brbover.htm#wp1049730

HTH,

GNT

[csco10837896]

Benefits

Improved SNMP Query Capabilities

The search criteria for SNMP queries for routes that are advertised by individual peers are improved because the peer address is indexed before the prefix. A network operator will no longer need to search through potentially thousands of routes to obtain the learned routes of a local BGP RIB table.

Improved AFI and SAFI Support

Support is added for multiprotocol BGP. AFI and SAFI are added as indexes to the table. The CISCO-BGP4-MIB can be queried for any combination of AFIs and SAFIs that are supported by the local BGP speaker.

Restrictions

BGP 4 MIB Support for per-Peer Received Routes supports only routes that are contained in IPv4 AFIs and unicast SAFIs in the local BGP RIB table. The BGP 4 MIB Support for per-Peer Received Routes enhancement is supported only by BGP Version 4.

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Yogesh