O'Reilly logo

Cisco® BGP-4 Command and Configuration Handbook (CCIE Professional Development) by William R. Parkhurst Ph.D.

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

8-11. neighbor {ip-address | peer-group-name} filter-list as-path-list-number out

Syntax Description:

  • ip-address— Neighbor's IP address.

  • peer-group-name— Name of the peer group. See section 8-19.

  • as-path-list-number— IP AS path list number.

Purpose: To filter outgoing route updates to a particular BGP neighbor. Filtering is based on AS path information. Only one filter list can be used per neighbor. The operation of the output filter list is identical for both IBGP and EBGP neighbors.

Cisco IOS Software Release: 10.0. Peer group support was added in Release 11.0.

Configuration Example 1: Block Routes Originating from a Particular AS

In Figure 8-12, Routers B and C are advertising four network prefixes. Router B filters the route update to Router ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required