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neighbor capability
Enables a neighbor capability: BGP route refresh.
Syntax: neighbor {ip-address | peer-group-name} capability capability
[no] neighbor {ip-address | peer-group-name} capability capability
ip-address
IP address of the BGP speaker neighbor.
peer-group-name
Name of a BGP peer group.
capability
Specifies a neighbor capability: Valid Values: route-refresh.
BGP route refresh provides automatic support for dynamic soft reset of inbound BGP routing table updates that are not dependent upon stored routing table update information. BGP speaker can request its neighbor to resend the entire ADJ-RIB OUT for a particular AFI/SAFI as detailed in RFC 2918.
BGP route refresh is session related. Route refresh can be enabled on an individual peer level in the peer group or enabled group wide. If enabled for the peer group, all peers inherit the same configuration.
BGP Route refresh is enabled by default on Avici routers. BGP route refresh is enabled using the neighbor [ipAddress | peerGroupName] capability route-refresh command in BGP router configuration command mode.
Use the no neighbor [ipAddress | peerGroupName] capability route-refresh command to disable BGP route refresh globally, for a single peer, or peer-group.
Use the show ip bgp neighbors to display route refresh status and statistics.
Manually initiate a soft inbound reset using the clear ip bgp options in command. Soft inbound resets can be initiated for all peers, a particular peer, a peer-group, or by AS. The soft inbound reset can apply to all AFI/SAFI combinations or by specifying IPv4 unicast or multicast to limit the reset to one of these types.
NOTE Use the in keyword, not the soft in keyword combination when initiating a route refresh soft inbound reset. The use of the soft keyword in the clear ip bgp command initiates a soft reconfiguration reset not a route refresh soft inbound reset.
Factory Default: Enabled.
Command Mode: Router configuration.
Example 1: In the following example BGP route refresh is disabled for peer 3.3.3.3:
router(config)#router bgp 100
router(config)#no neighbor 3.3.3.3 capability route-refresh
router(config-router)#do show ip bgp neighbors 3.3.3.3
BGP neighbor 3.3.3.3 using remote AS 100
router ID: 3.3.3.3 version: 4
Local peer does not support route-refresh capability
state: Active time: 0:00:19
def orignat: False ebgp multihop: False
n hop self: False route ref client: False
send comm: False soft reconfig: False
update src: loopback 0
hold time: 0 sec keepalive time: 0 sec
configured hold time/keepalive time: 180/60 sec
advertisement interval: 5 sec
# notf rcvd: 1 # msg rcvd: 0 # updates rcvd: 0
# notf sent: 2 # msg sent: 0 # updates sent: 0
number of prefixes received: 0
Address Family IPv4 Unicast: activated advertised
Routes Dropped : 0
Time Since First Dropped : 0:00:00
Reason for dropping first Route : No Routes Dropped
Last Reset 0:00:19 , due to BGP Cease sent to peer
router(config-router)#end
router#
Example 2: In the following example BGP route refresh is enabled for peer 3.3.3.3:
router(config)#router bgp 100
router(config-router)#neighbor 3.3.3.3 capability route-refresh
router(config-router)#do show ip bgp neighbors 3.3.3.3
BGP neighbor 3.3.3.3 using remote AS 100
router ID: 3.3.3.3 version: 4
state: Estab time: 0:01:16
def orignat: False ebgp multihop: False
n hop self: False route ref client: False
send comm: False soft reconfig: False
update src: loopback 0
hold time: 180 sec keepalive time: 60 sec
configured hold time/keepalive time: 180/60 sec
advertisement interval: 5 sec
# notf rcvd: 1 # msg rcvd: 24218 # updates rcvd: 24216
# notf sent: 1 # msg sent: 4 # updates sent: 0
number of prefixes received: 127756
Route refresh capability: advertised
Route Refresh for address family IPv4 unicast: #msg rcvd: 0 #msg sent 0
Address Family IPv4 Unicast: activated advertised received in-use
Routes Dropped : 0
Time Since First Dropped : 0:00:00
Reason for dropping first Route : No Routes Dropped
Last Reset 0:01:49 , due to BGP Cease sent to peer
router(config-router)#
Related Commands: clear ip bgp in
neighbor peer-group
show ip bgp neighbors
show ip bgp peer-group
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Copyright © 2004
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are
trademarks of Avici Systems Inc.
Source
File Name: BGP_Nd.fm
HTML File Name: BGP_Nd25.html
Last Updated: 05/10/04 at 16:36:55