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?
What's doing your call signaling here? Are either of these routers CCME, or do you have CCM somewhere? Are you using a routing protocol? Do you have a PRI/POTS lines somewhere? In the event of a failure, do you only need the phones to be able to call each other, or do the need to get out to the PSTN?
The actual routing should be simple, but if the phones cannot register with something on the side of R2, it's not going to work.
What you can do is run HSRP between the two routers for the voice VLAN and a second for the data VLAN. You'll want to make the priority higher on R1 so that the voice/data traffic will go through it under normal circumstances. In the event of R1 failing, voice/data traffic will go through R2 automatically.
HSRP supports tracking, which you could configure on each router under the standby configuration to fail in the event of the serial interface going down.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.