There's a feature called reliable static route using object tracking and this can provide the redundancy you are looking for. You can point the route on the 3550 to the primary PIX and the second route, with a higher administrative distance, needs to point to the redundant PIX. The object tracking feature would verify the status of the primary PIX and if it goes down the 3550 would start using the redundant route.
Here's a link that can help you understand and configure this solution. Let us know if you have any questions concerning this.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.