Administrator Guide

Layer 3 Routing Commands 1293
• in —The AS Path list is applied to advertisements received from the
neighbor.
•
out —The AS Path list is applied to advertisements to be sent to the
neighbor.
Default Configuration
No neighbor filter lists are configured by default.
Command Mode
BGP Router Configuration mode
User Guidelines
Only a single AS path list can be configured in each direction for each
neighbor. If you invoke the command a second time for a given neighbor, the
new AS path list number replaces the previous AS path list number.
If you assign a neighbor filter list to a nonexistent AS path access list, all
routes are filtered.
Command History
Introduced in version 6.2.0.1 firmware.
Example
console(config-router)#neighbor FE80::0202:B3FF:FE1E:8329 filter-list 1 in
neighbor filter-list (IPv6 Address Family
Configuration)
This command filters BGP to apply an AS path access list to UPDATE
messages received from or sent to a specific neighbor. Filtering for IPv6 is
independent of filtering configured for IPv4. If an UPDATE message includes
both IPv4 and IPv6 NLRI, it could be filtered for IPv4 but accepted for IPv6
or vice versa.
Syntax
neighbor { ip-address | ipv6-address [ interface interface-id ]} filter-list as-
path-list-number
{in | out}
2CSNXXX_SWUM204.book Page 1293 Monday, January 25, 2016 1:25 PM