guys we have two router (redundant WAN connection to same service provider). we have bunch of network in core using ospf (WAN router is config with OSPF LAN side) now there was requirement by customer that bunch the network together and advertise them in BGP however there was a special requirement that specif network shd take specific router for in-coming traffic
the solution was that we have done prepend and aggregate the routes in BGP
so we have done
agregation with /16 under BGP (no network command was used as router was getting all the routes from OSPF)
and then i have done two porefix list
perix list from ospf to bgp
prefix list from BGP (not to ospf but from service provider)
in prefix list in bgp i have allowed default route (on both routers) and some specific routes for network management
in prefix list from ospf to bgp i have put /16 networks for redistribution (so in future if they add oteh routes they shd not get propagated to WAN)
now in as-path prepend they wanted that 192.168.1.0/16 shd come from WAN router 1 and 22.214.171.124/16 shd take router 2.and if one router fails the other network shd take the same.
in redistribution from BGP i have done
redistribute bgp subnets and second command was default information originate under ospf.
now the customer is saying that they have routing loop and told us that we shd put filters on redistribution of BGP into ospf
All i am saying that we are only allowing default routerplus specific routes how come they see there own network
which is 192.168.1.0/16
he is saying that since we are redistributing BGP into ospf with command redistribute the router is redistribution all subnet in BGP routing table is it possible as i guess we are advertising those networks with aggregation how come bgp is again redistributing them again into ospf. I think that BGP shd be only redistributing routes which is learned by BGP not advertising by BGP...
guys help me required.