I have attached a diagram of a proposed network.
I need to route all VoIP traffic through R1, which is no problem.
However, the client wants a failover solution so that if the serial link on R1 goes down, voice and data will fail over to R2. Conversely, if S0 goes down on R2, data will go to R1 (voice already is). I'm sure that this would be possible with BGP, but that's not an option in this situation.
Does anyone have any suggestions on how to do this otherwise?
Thanks in advance,