I have the following configuration: a 1841 Cisco Router, IOS ver 12.3(4) and two internet providers, each configured with it's own public IP, which is NATed.
I used "route-maps", so is the primary connection goes down (in the sense that the L1 connection goes down (broken cable, pull cable out), the redundant ISP connection is automatically inserted in the ROUTE TABLE.
All fine and dandy, except that when the internet "goes down", 99.9% of the time it's because of the ISP's Gateway Problem (not a switchport problem), so even if the Internet goes down, the backup connection doesn't activate, unless i manually remove the cable from the router.
What i want to do is base this "redundant ISP plan" on ICMP packets..so if the gateway dowsn't respond to pings for x seconds, activate the backup route and keep monitoring until the connection comes back up.
Thanks for the answer. The solution provided above seems to be what i am looking for, but my cisco 1841 dowsn't seem to have the ip sla command, which is odd because looking at the IOS command list, it should be there.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...