Hi all,
Scenario:
MPLS Provider -----> WAN Router -----> Cloud Switch ------>Cloud Env.
Our MPLS provider provides us with specific RFC1918 and a default routes via BGP which are learnt via a WAN Router. On the WAN Router, we aggregate the 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 routes and advertise these (as well the specifics learnt from the MPLS Provider) to the Cloud Switch which only accepts the 3x aggregate routes (via route-maps).
The problem I have is our MPLS provider does not send EVERY subnet we own and we rely on the default-route capturing these non-specified routes. Thus, although 10.2.0.0/24 is a valid subnet, that specific subnet is not learnt via BGP and the default route would normally capture this. Currently, when a device within the Cloud Env, attempts to get to 10.2.0.0/24, the traffic hits the Cloud Switch, then goes to the WAN Router whereby the WAN Router routes it to Null0 as it's captured by the aggregate route; 10.0.0.0/8.
Is there a way of specifying on the router to advertise the aggregate route to peers but when it receives traffic which only matches the aggregate route and non-specific learnt ones, to send this traffic via the default route rather than routing it to Null0?
Thanks for your help!
Regards,
Jimmy
