I have the following configuration
I have routers R6, R8, R9, R10 and R11 running OSPF. And routers R12, R13 and host C1 aren't. C1 has its default gateway set to R13's shared interface and R13 and R12 have their default gateways set to R6's interface with them.
Now, I'd like to ping a host connected to R11 from C1. The problem I have is that none of the routers running OSPF can see the network C1-R12-R13. The only network in that area I can see from any of them is the one shared by R6-R12-R13.
How can I make that other network known to the routers running OSPF?
Thanks