If one site at AREA 10 drops the connection to AREA 10, then we can access this site via AREA 20 with the help of static routs with distance higher than OSPF default 110 and static routs redistribution in OSPF.
How do we do this, if we configure summary or stub to reduce size of the routing table?
An gre tunnel through area 20 could fix this problem. A static route to a loopbak on the ABR for area 10 via area 20, the link between areas announces by area 20. Tunnel source/dest between area 10 link ip address and the loopback on area 10 ABR. The tunnel will be a area 10 network. With this, the summary of area 10 will be intact, and full dynamic in the routing. I only need to adjust the ip ospf cost on the tunnel so that traffic wouldnt use the gre tunnel primary. I have tryed this and it works just fine.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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