At our school, our district office is on a point to point wireless connection that at the moment is un-reliable and dropping packets due to interference (we think). All of the traffic from this office crosses this wireless link (internet, VOIP, and other general network traffic). We are putting in a comcast cable connection at this office soon and are wondering how to use this as a backup for all traffic (internet/voice, etc...). We have a Catalyst 3560 (layer 3 capable image I think) over there already. We just installed a 2801 Router there as well intending to use the SRST function to roll voice over to POTS lines when the wireless is down. The main question is here...HOW do we failover to this backup connection (cable internet) when traffic over the wireless is bad? Is it possible to failover using ACLs? Like if a certain amount or percentage of packets are dropping, the connection could then failover? We are running RIP v.2 as our routing protocol. Any ideas at all would be appreciated. The 3560 switch is: WS-C3560-24PS-S, this IOS version: 12.2(25)SEE3, with this switch image: 3560-IPBASE-M
Thanks for your help!