Reference Guide

394 | Border Gateway Protocol IPv4 (BGPv4)
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aggregate-address
c e
t
s
Summarize a range of prefixes to minimize the number of entries in the routing table.
Syntax
aggregate-address ip-address mask [advertise-map map-name] [as-set] [attribute-map
map-name] [summary-only] [suppress-map map-name]
Parameters
Defaults
Not configured.
Command Modes
ROUTER BGP Address Family (conf-router_bgp_af)
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.
Do not add the as-set parameter to the aggregate. If routes within the aggregate are constantly
changing, the aggregate will flap 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 true: routes meeting the permit clause are
suppressed.
If the route is injected via the network command, that route will still appear in the routing table if the
summary-only parameter is configured in the aggregate-address command.
The summary-only parameter suppresses all advertisements. If you want to suppress advertisements to
only specific neighbors, use the neighbor distribute-list command.
Command
History
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 will not be 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.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series