I need some of your expert advice.
We have a PA in a Datacenter that has 5 ISP running OSPF with the firewall and is running perfectly fine. We now have a 6th ISP which is a link express route into azure. The option for this azure link is the lowest option, only allowing 4000 routes maximum anything exceeding this causes issues.
BGP is established between the firewall and the 6th ISP, OSPF to BGP & BGP to OSPF redistribution is working perfectly fine.
The issue having is to summarize the routes between the two protocols avoiding the advertising of more than 4000 routes over the express route (BGP) into Azure.
Is this possible on both OSPF and BGP. Tried using the redistribution destination subnets on both does not seem to work with priorities, on BGP tried the aggregate summarization does not seem to work either also tried including Export in BGP matching prefixes.
In the local rib can see the networks advertised, but not on RIB out when applying filters in the routing protocols changes.
I've successfully aggregated routes in bgp by manually defining them on the outbound. I've not played with OSPF at all so can't help you there. Care to share your config?