Reference Guide

Border Gateway Protocol | 213
aggregate-address
s z
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
ROUTER BGP ADDRESS FAMILY IPv6
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 as 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.
In the show ip bgp command, aggregates contain an ‘a’ in the first column and routes suppressed by
the aggregate contain an ‘s’ in the first column.
Command
History
.
S6000
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 9.0.2.0 Introduced on the S6000.
Version 8.3.11.1 Introduced on the Z9000.
Version 6.5.1.0 Introduced on the S-Series