Reference Guide

aggregate-address
Summarize a range of prefixes to minimize the number of entries in the routing table.
C-Series, E-Series TeraScale, S-Series
Syntax
aggregate-address ip-address mask [advertise-map map-name] [as-
set] [attribute-map map-name] [summary-only] [suppress-map map-
name]
Parameters
ip-address mask Enter the IP address and mask of the route to be the aggregate
address. Enter the IP address in dotted decimal format (A.B.C.D) and
mask in /prefix format (/x).
advertise-map
map-name
(OPTIONAL) Enter the keywords advertise-map followed by the
name of a configured route map to set filters for advertising an
aggregate route.
as-set
(OPTIONAL) Enter the keyword as-set to generate path attribute
information and include it in the aggregate.
AS_SET includes AS_PATH and community information from the
routes included in the aggregated route.
attribute-map
map-name
(OPTIONAL) Enter the keywords attribute-map followed by the
name of a configured route map to modify attributes of the aggregate,
excluding AS_PATH and NEXT_HOP attributes.
summary-only (OPTIONAL) Enter the keyword summary-only to advertise only
the aggregate address. Specific routes are not advertised.
suppress-map
map-name
(OPTIONAL) Enter the keywords suppress-map followed by the
name of a configured route map to identify which more-specific
routes in the aggregate are suppressed.
Defaults Not configured.
Command Modes ROUTER BGP Address Family (conf-router_bgp_af)
Command History
Version 7.8.1.0 Introduced on the S-Series.
Version 7.7.1.0 Introduced on the C-Series.
Usage
Information
At least one of the routes included in the aggregate address must be in the BGP routing table
for the configured aggregate to become active.
If routes within the aggregate are constantly changing, do not add the as-set parameter to
the aggregate as the aggregate flaps to keep track of the changes in the AS_PATH.
In route maps used in the suppress-map parameter, routes meeting the deny clause are
not suppress; in other words, they are allowed. The opposite is also true; routes meeting the
permit clause are suppressed.
If the route is injected via the network command, that route still appears in the routing table
if the
summary-only parameter is configured in the aggregate-address command.
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