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aggregate-address
To minimize the number of entries in the routing table, summarize a range of prefixes.
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 then 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 then 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 then 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
● ROUTER BGP ADDRESS FAMILY IPv6
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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.
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.
bgp add-path
Allow the advertisement of multiple paths for the same address prefix without the new paths replacing any previous ones.
Syntax
bgp add-path [send | receive | both] path-count
Border Gateway Protocol IPv4 (BGPv4) 263