BGP neighbor unsuppress-map

Using the aggregate-address command with no arguments will create an aggregate entry in the BGP routing table if there are any more-specific BGP routes available that fall in the specified range. The aggregate route will be advertised as coming from your autonomous system and has the atomic aggregate attribute set to show that information might be missing. (By default, the atomic aggregate attribute is set unless you specify the as-set keyword.)

If a subset of suppressed routes needs to be made available, you can unsuppress those routes on a per-neighbor basis using the neighbor unsuppress-map command.

Video Demonstration

from: Cisco IOS IP Routing: BGP Command Reference

neighbor unsuppress-map

To selectively advertise routes previously suppressed by the aggregate-address command, use the neighbor unsuppress-map command in address family or router configuration mode. To restore the system to the default condition, use the no form of this command.

neighbor {ip-address | peer-group-name} unsuppress-map route-map-name

no neighbor {ip-address | peer-group-name} unsuppress-map route-map-name

Syntax Description

ip-address	IP address of the BGP-speaking neighbor.
peer-group-name	Name of a BGP peer group.
route-map-name	Name of a route map.

Command Default

No routes are unsuppressed.

Command Modes

Address family configuration
Router configuration

Command History

Release	Modification
12.0(5)T	This command was introduced.
12.0(5)T	Address family configuration mode was added.
12.2(33)SRA	This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX	This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Usage Guidelines

Use of the neighbor unsuppress-map command allows specified suppressed routes to be advertised.

Examples

The following BGP router configuration shows that routes specified by a route map named map1 are suppressed:

access-list 3 deny 172.16.16.6

access-list 3 permit any

route-map map1 permit 10

match ip address 3

!

router bgp 65000 

network 172.16.0.0

neighbor 192.168.1.2 remote-as 40000

aggregate-address 172.0.0.0 255.0.0.0 suppress-map map1

neighbor 192.168.1.2 unsuppress-map map1

neighbor 192.168.1.2 activate

The following example shows the routes specified by internal-map being unsuppressed for neighbor 172.16.16.6:

router bgp 100

address-family ipv4 multicast

 network 172.16.0.0

 neighbor 172.16.16.6 unsuppress-map internal-map

Related Commands

Command	Description
address-family ipv4 (BGP)	Places the router in address family configuration mode for configuring routing sessions such as BGP, RIP, or static routing sessions that use standard IPv4 address prefixes.
address-family vpnv4	Places the routing in address family configuration mode for configuring routing sessions such as BGP, RIP, or static routing sessions that use standard VPNv4 address prefixes.
aggregate-address	Creates an aggregate entry in a BGP routing table.
neighbor route-map	Applies a route map to inbound or outbound routes.

Files:
Topology
Configs
BGP Configuration