neighbor advertise-map

This command provides for conditional advertisement of routes for this neighbor.

Syntax

neighbor {ip-address | groupID} advertise-map adv-map non-exist-map non-exit-map

no neighbor {ip-address | groupID} advertise-map adv-map non-exist-map non-exit-map

Parameters

ip-address	Specifies a BGP peer as a valid IPv4 address in dotted-quad format or as a valid IPv6 address in colon-separated format.
groupID	Specifies a BGP peer group name as a character string. If an invalid IP address is specified (for example, 256.1.1.1), it will be read as a group name.
adv-map	Specifies the BGP route-map containing the prefix to be added to the RIB for this neighbor, only if there is no route in the local RIB that matches a route in the non-exist-map.
non-exist-map	Specifies the BGP route-map containing the prefix that if not found in the local RIB will cause the prefix in the advertise map to be advertised.

Defaults

None.

Mode

BGP Router Configuration.

Usage

The neighbor advertise-map command provides for conditional advertisement of routes for this neighbor using advertise-map and non-exist-map route-maps. Configure prefix-list match clauses in the non-exist-map route-map with prefixes that should exist and be advertised to the peer under normal operational conditions. Should any prefix in the non-exist-map route-map fail (no longer exist), then the router will start advertising the prefixes in the advertise-map route-map, which are alternate routes to the preferred routes in the non-exist-map route-map.

Prefix-lists are assigned to route-maps associated with this command using route-map bgp.

The no neighbor advertise-map command deletes the conditional advertisement configuration for the specified neighbor.

Example

The following example:

Configures an advertise-map prefix-list named adv-list1 and assigns it to BGP route-map adv-map1, specifying prefix 155.25.1.0/24 as the prefix to be advertised if the prefix in the non-exist-map route-map is not available
Configures a non-exist-map prefix-list named non-exist-list1 and assigns it to BGP route-map non-exist-map1, specifying prefix 200.51.1.0/24 as the advertised prefix, unless it is not available (does not exist)

Configures a BGP advertise-map for neighbor 9.1.2.1 that assigns adv-map1 as the advertise map route-map and non-exist-map1 as the non-exist-map route-map

System(su-config)->ip prefix-list adv-list1 permit seq 1 155.25.1.0/24
System(su-config)->route-map bgp adv-map1
System(su-config-route-map-bgp)->match adv-list1 adv-map1
System(su-config-route-map-bgp)->exit
System(su-config)->ip prefix-list non-exist-list1 permit seq 1 200.51.1.0/24
System(su-config)->route-map bgp non-exist-map1
System(su-config-route-map-bgp)->match non-exist-list1 non-exist-map1
System(su-config-route-map-bgp)->exit
System(su-config)->router bgp 65151
System(su-config-bgp)->neighbor 9.1.2.1 advertise-map adv-map1 non-exist-map non-exist-map1
System(su-config-bgp)->

Published May 2016prev | next

Email this topic

Print this page Print this page

Leave feedback Feedback