Automatic Failover using 2 T-1's
Posted on 2006-05-31
I'll try to make this clear and simple. Maybe get into details later as needed.
I am going to be installing a Cisco 1841 router with 2 T-1 Wics.
One T-1 will be with Southwestern Bell and the other with Verizon for failover purposes.
Here's the tricky part.
I will have a watchguard firewall 192.168.1.254 that will be the main gateway on my network Connected to FE 0/0 on the cisco. All misc. internet traffic will pass through it and out through Southwestern Bell's T-1.
Then, I will have a VPN device 192.168.1.253 connected to FE 0/1 on the cisco. This VPN will go out through the Verizon Link. (It is a custom hosted application that we want to keep off of our main internet for bandwidth purposes)
Without any other Cisco software (just the IOS that ships with the 1841), how do I configure failover for each of those T-1 connections at the router level.
1. The Verizon link drops. Route the VPN traffic through SWB.
2. The SWB link drops. Route regular internet traffic through Verizon.