Enterasys Networks X-Pedition XSR CLI - Manual (Page 281)

BGP Configuration Commands
XSR CLI Reference Guide 6-85
Syntax of the “no” Form
The no form of this command removes the aggregate entry from the table:
no aggregate-address address mask
Mode
Router configuration: XSR(config-router)#
Default
Disabled
Example
The following example aggregates routes ranging from 192.168.0.0 to 192.168.255.0, each with a
mask of 255.255.255.0, into a single aggregate route of 192.168.0.0 with a mask of 255.255.0.0. The
optional summary‐only keyword can be used to direct only the aggregate route be advertised to
this router’s neighbors. Ommiting the as‐set option can indicate that all of the routes originate in
the same AS and follow the same routing policy, this resulting in no loss of any BGP attribute data
within the aggregate.
XSR(config)#router bgp 100
XSR(config-router)#aggregate-address 192.168.0.0 255.255.0.0 summary-only
auto-summary
This command restores the default behavior of BGP by summarizing redistributed IGP subnets on
classful network boundaries. Automatic summarization of IGP subnets reduces the number of
routes in the BGP routing table, improving router performance and reducing the amount of
bandwidth used by routing traffic between BGP peers.
Syntax
auto-summary
Syntax of the “no” Form
The no form of this command removes BGP summarization:
no auto-summary
as-set Prevents data loss, including contents of BGP attributes, from more
specific routes in the aggregate route. Note that when the contents
of those attributes vary within more specific routes, reducing them
to the same value within corresponding attributes of the aggregate
route can cause routing problems such as loops.
summary-only Prevents more specific routes that comprise the aggregate route
from being advertised.
advertise-map map-name The route map used to select the routes that comprise AS‐SET origin
communities, ranging from 1 to 199.
attribute-map map-name The route map used to set the attribute of the aggregate route,
ranging from 1 to 199.