Alcatel-Lucent 6850-48 参照ガイド

BGP Commands

OmniSwitch CLI Reference Guide

page 44-35

Specifies whether AS path aggregation is to be performed or not. AS path aggregation takes the AS path 
for all routes in this aggregate and creates a new AS path for the entire aggregate. This aggregated AS path 
includes all the ASs from the routes in the aggregate, but it does not repeat AS numbers if some routes in 
the aggregate include the same AS in their path.

ip bgp aggregate-address ip_address ip_mask as-set

no ip bgp aggregate-address ip_address ip_mask as-set

32-bit IP address. 

32-bit subnet mask that determines how many bits of the IP address 
denote the network number.

This command is disabled by default.

OmniSwitch 6850, 6855, 9000, 9000E

• Use the no form of this command to disable the as-set option.

• When AS path aggregation is disabled (the default), the AS path for the aggregate defaults to the AS 

number of the local BGP speaker (configured in the 

 command).

• If AS path aggregation is enabled, a flap in a more specific path’s AS path will cause a flap in the 

aggregate as well. 

• Do not use this command when aggregating many paths because of the numerous withdrawals and 

updates that must occur as path reachability information for the summarized routes changes. 

-> ip bgp aggregate-address 172.22.2.115 255.255.255.0 as-set

-> no ip bgp aggregate-address 172.22.2.115 255.255.255.0 as-set

Release 6.1; command was introduced.

Creates and deletes a BGP aggregate route.