Aggregate routes and addresses
BGP4 allows classless routing, which uses netmasks as well as IP addresses. This classless routing enables the configuration of aggregate routes by stating the address bits the aggregated addresses have in common. For more information, see
“Aggregated routes and addresses”.
The ATOMIC_AGGREGATE attribute informs routers that the route has been aggregated, and should not be de-aggregated. An associated AGGREGATOR attribute include the information about the router that did the aggregating including its AS.
The BGP commands associated with aggregate routes and addresses are:
config router bgp
config aggregate-address
edit <aggr_addr_id>
set as-set {enable | disable}
set prefix <address_ipv4mask>
set summary-only {enable | disable}
end
config aggregate-address6
edit <aggr_addr_id>
set as-set {enable | disable}
set prefix6 <address_ipv6mask>
set summary-only {enable | disable}
end
end