BGP Conditional Advertising
BGP conditional advertising is supported in FortiOS 5.2.
Normally, routes are propagated regardless of the existence of a different path. Using BGP conditional advertisement allows a route not to be advertised based on existence or non-existence of other routes. With this new feature, a child table under bgp neighbor is introduced. Any route matched by one of the route-map specified in the table will be advertised to the peer based on the corresponding condition route-map.
Syntax
config router bgp
config neighbor
edit <name>
set remote-as 3
config conditional-advertise
edit <name>
set condition-routemap <name>
set condition-type {exist | non-exist}
end
end
end
end
end