4507 L3 swith with 12.2(18)EW. Ways to get automatic Internet failover

Unanswered Question
Oct 20th, 2008

Hi All,

Straight & simple query..:-). 4507 with IOS 12.2(18)EW acting as L3 core having default gateway to PIX inside (ip route It also got 1gig p2p connectiont main data center. I want the internet to automatically failover to main datacenter incase if the PIX looses internet connectivity (PIX -->Internet rtr--> carrier) and take over via PIX when the internet connection comes back. Will object tracking feature works here or any other suggestions are welcome.

Thank you all


I have this problem too.
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cpubob Mon, 10/20/2008 - 12:39

I would add a floating static route and then redo your current default with a track object.

Assuming is the gateway that your pix uses (providers interface) and is your datacenter gateway, this would be the config.

ip route 200

ip route track 100


track 100 rtr 1 reachability


ip sla 1


frequency 15

timeout 30


ip sla schedule 1 life forever start-time now


You could alternatively configure bgp but I think it would be more hassle.

fortis123 Tue, 10/21/2008 - 12:15

I looked for this option in first place, before I posted the query, but with the current IOS, it does not support 'track 100 rtr 1 reachability '

PROD-4507-S1(config)#track 100 ?

interface Select an interface to track

Also, 'ip sla' support is not there..

Thank you


cpubob Wed, 10/22/2008 - 11:08

I tried this on my 4500 and it worked but I am running 12.2(46)SG.


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