address— Aggregate IP address.
mask— Aggregate mask.
Purpose: To create an aggregate entry in the BGP table. An aggregate is created only if a more-specific route of the aggregate exists in the BGP table. Without the as-set option, the AS path information for the specific routes forming the aggregate is lost. This form of the aggregate-address command advertises the aggregate while retaining the AS path information for the more-specific routes.
Cisco IOS Software Release: 10.0
In Figure 1-4, Router A is learning about networks 172.16.0.0/24 and 172.16.1.0/24 from AS 65530 and networks ...