Alcatel-Lucent 060321-10, Rev. B, Справочное руководство CLI

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ip bgp aggregate-address as-set BGP Commands
page 19-36 OmniSwitch CLI Reference Guide March 2011
ip bgp aggregate-address as-set
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
Syntax Definitions
ip_address 32-bit IP address.
ip_mask 32-bit subnet mask that determines how many bits of the IP address
denote the network number.
Defaults
This command is disabled by default.
Platforms Supported
OmniSwitch 10K
Usage Guidelines
•
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
ip bgp autonomous-system 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.
Examples
-> 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 History
Release 7.1.1; command was introduced.
Related Commands
ip bgp aggregate-address Creates and deletes a BGP aggregate route.