here at work, a company has installed 2 routers, 1 with a dsl port and the other is an isdn bri router, they have linked it so that it ones fails it uses the isdn router ? they are soho 800 routers, I think one of them is in the lan and then the other router is plugged into the back of the other via the hub on the back, will they just use a static route to the dsl port and then another route with a cost to the isdn port ? am i correct ?
If it would have been a single router with a DSL and an ISDN port then you point holds true. It make sned to have two routes one with the active link and the other with a higher metric to be used a floating static route.
I think thet might have used HSRP on the lan between the 2 routers and tracked the DSL interface on the primary router so that in case if that goes down, the LAN will use the other router as gateway and will fire up the ISDN.
I am a little unsure from these instructions, Could you show me a simple config for the scenario above, whereas I have 2 different routers 1 with dsl that is always used, and the other router has the idsn fallover, I want it to track the dsl so if that goes down it uses the isdn !!
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