So here is the challenge I am comming up against. I have a 1941 router with the security licence. I am setting up both a T1 wic that connects to my enterprise MPLS cloud and one of the two gig interfaces that will connect to my home office through a VPN tunnel to a ASA 5520. I have tried multiple solutions though my gues is that I am making this WAY more difficult than it needs to be. What I am trying to create is a primary on the serial interface and then a failover through the VPN.
Any thoughts, suggestions are VERY welcome!
So far, I have tried to:
Track the serial interface and then set the default route, based on the tracking
Create an IP SLA to echo the gateway of the serial interface to change the routing
Started to create HSRP between the two interfaces though I could not figure out if / how a standby could be put into a sub-interface on the serial
The SLA seems to be working somewhat. The problem is that it is not transparent and sometimes even needs me to clear the VPN tunnel to get things back to smoothly through the serial interface.
Like I said, I am guessing that I am going about this in a WAY to complicated way.
May be you should remove track configuration and try to do it with IP SLA only and it should work. I am using Cisco 2921 with similar scenario and its working fine, the only difference I see is - i had configured my HO MPLS routers as IP SLA responder. May be you should try that as well.
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