LAN Routing

[jasonm]

I have a cisco 2621 Voice GW with a Voice T1 card. I have two cable modems in my office both being nat'd. I setup two IP routes on my cisco 2621 which looks like this:

ip route 0.0.0.0 0.0.0.0 192.168.1.1 50

ip route 0.0.0.0 0.0.0.0 192.168.1.2 100

Both these IP's are GW routers to my cable modem connection. Problem is when 192.168.1.1 goes down my calls are not routed over to the next IP route. How do I get it to failover to the next available connection?

[Harold Ritter]

Unfortunately, in this specific scenario since you are using Ethernet interface the router has no way of detecting router 1 or 2 is down.

You could either receive the default GW dinamicaly via this two routers or run HSRP on the two routers (192.168.1.1 and .2) and configure the static route using the HSRP virtual IP address.

Hope this helps,

[jasonm]

Thanks for the information, but isn't there a way if one route is experiencing a certain amount of packet loss or latency to auto switch such as the way QoS is used in voice and fax?

[Harold Ritter]

There is a feature called Object Tracking but unfortunately it seems to be available to HSRP, VRRP and PBR. Your best bet would be to use HSRP for now.

Hope this helps,

[tbaranski]

If HSRP isn't an option here -

Until ping-based routing makes it into a mainstream code version the only option I see is to set up ping-based policy routing per http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a00801d1e95.html. Configure the router to policy route everything out the primary interface unless that interface's gateway stops responding to pings, and to failover to the secondary interface when this happens.

Note that you need to be running very recent code (12.3(4)T or newer) to use this feature.

[Harold Ritter]

My bad. I suggested HSRP cause I misunderstood the topology. I assumed that the static routes were on a different route than the cable connections. Is there any possibility to run a routing protocol between the 2600 and the provider?