We have implemented a network with Nortel Contivity VPN switches that is used as fail-over if the leased lines goes down. The layout is one headquater and several branch offices.
The changes in the routing tables are handled by using RIP.
Most of the routing is handle by level 3 switches, but for one leased line Cisco 1600's are used.
In all the branch offices the Nortel Contivity is connected to an ADSL circuit (which is also used for "local" internet traffic) - All of these ADSL's have got an external IP address that looks like this: 80.x.x.x/30 or 80.x.x.x/32
The Contivity reports the route to the external IP address, through RIP to the headquater Cisco 1600.
Here they shows in the routing table, but above all the individual routes to 80.x.x.x/30 and /32, a route to 80.0.0.0/8 shows. This route is send to the Cisco 1600 at the other end of the leased line (in a branch office), together with all the correct routes, causing all trafic to 80.x.x.x to be routed to the head quater, were it (in most cases) should have been routed directly out on the internet through the firewall in the Contivity.
The RIP config in both routers looks like this:
router rip
version 2
network x.x.x.x (local ethernet subnet)
no auto-summary
ip classless is configures as well.
Hope someone could tell me how to disable the creation of this strange route entry. Or if it is possible to prevent RIP from sending it out.
Regards
Peter
