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bgp confederation peers
Configures sub-autonomous systems that belong to a confederation.
Syntax: [no] bgp confederation peers as-sys [as-sys]
as-sys
Sub-autonomous system number. Valid values are integers from 1 to 65535.
Description: Confederations enable you to reduce the size and complexity of the IBGP mesh. See bgp confederation identifier. Sub-autonomous systems configured as confederations are only visible within the defined confederation. From outside the confederation, they appear as a single autonomous system.
Use the bgp confederation identifier command to create the confederation ID.
Use the bgp confederation peers command to specify which sub-autonomous systems belong to a confederation.
WARNING Do not include the sub-AS number specified using the router bgp command in the list of ASs specified using the bgp confederation peers command.
Use the no bgp confederation peers as-sys command to remove the specified sub-autonomous system from a confederation.
Use the no bgp confederation peers command with no argument to remove all sub-autonomous systems from a confederation.
Factory Default: No confederation peers are configured.
Command Mode: Router configuration.
Example: In the following example:
- The router bgp command enables BGP and associates the router with confederation 65010.
- The bgp confederation identifier configures confederation 65010 as within autonomous system 42.
- The confederation peers command specifies that confederations 65020, 65030 and 65040 are members of a single autonomous system 42.
- The neighbor remote-as commands identify two BGP neighbors. To routers outside the routing confederation, all three routers appear to belong to a single autonomous system 42.
router(config)#router bgp 65010
router(config-router)#bgp confederation identifier 42
router(config-router)#bgp confederation peers 65020 65030 65040
router(config-router)#neighbor 10.5.1.123 remote-as 65020
router(config-router)#neighbor 10.22.4.234 remote-as 65030
Related Commands: bgp confederation identifier
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Source
File Name: BGP_Nd.fm
HTML File Name: BGP_Nd7.html
Last Updated: 05/10/04 at 16:36:55