I am trying to build redundancy in our network, and have run across an issue. I have traffic coming into my network from multiple satellite offices, they are coming into 3 different firewalls (non-Cisco) and if one of the firewalls goes down I would like my Cisco 3750 to point the traffic going to the one that is down to one of my other firewalls. How would I do that dynamically?
Another option you could explore if you want to avoid dynamic routing would be the use of "object tracking". With the use of either the "ip sla"/"rtr" (depends on ios) and the "track" commands, your device can monitor and track the reachability state of a host on the internet for example, and force down your primary default route (routes have to be created with different metrics) thereby forcing your secondary route into the route table and so on. You can also track the state of the interfaces but this doesnt always help because the outage could be downstream and your switch interface would still be "up" to your firewall. Check out the resources for Cisco RTR, IP SLA, or object tracking online.
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.