configure bgp add aggregate-address
ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
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configure bgp add aggregate-address
configure bgp add aggregate-address {address-family [ipv4-unicast |
ipv4-multicast]} <ipaddress> {as-match | as-set} {summary-only}
{advertise-policy <policy>} {attribute-policy <policy>}
Description
Configures a BGP aggregate route.
Syntax Description
Default
If no address family is specified, IPv4 unicast is the default.
Usage Guidelines
Route aggregation is the process of combining the characteristics of several routes so that they are
advertised as a single route. Aggregation reduces the amount of information that a BGP speaker must
store and exchange with other BGP speakers. Reducing the information that is stored and exchanged
also reduces the size of the routing table.
To use BGP route aggregation, follow these steps:
1
Enable aggregation using the following command:
enable bgp aggregation
2
Create an aggregate route using the following commands:
configure bgp add aggregate-address {address-family [ipv4-unicast | ipv4-
multicast]} <ipaddress> {as-match | as-set} {summary-only} {advertise-policy
<policy>} {attribute-policy <policy>}
Example
The following command configures a BGP aggregate route:
configure bgp add aggregate-address 192.1.1.4/30
address-family
The address family. BGP supports two address families: IPv4 Unicast and IPv4
Multicast.
ipaddress
Specifies an IP network address and mask length.
as-match
Generates autonomous system sequence path information (order of AS numbers
in AS_PATH is preserved).
as-set
Generates autonomous system set path information (order of AS numbers in
AS_PATH is not preserved).
summary-only
Specifies to send only aggregated routes to the neighbors.
advertise-policy
Specifies the policy used to select routes for this aggregated route.
attribute-policy
Specifies the policy used to set the attributes of the aggregated route.
