Aggregates and Null0
Remember: matching route must exist in routing table before it will be announced by BGP
router bgp 1
- network 198.10.0.0 mask 255.255.0.0
ip route 198.10.0.0 255.255.0.0 null0 250
Static route to null0 often used for aggregation
- Packets will be sent here if there is no more specific match in the routing table
- Distance of 250 ensures last resort
Often used to nail up routes for stability