Monitor an interface

Answered Question
May 2nd, 2009

I have cisco 2821 router and I want to monitor an ISDN BRI interface, in case the line goes down. I would then like the router to shut down the ethernet interface automatically, thus taking it of the network. This would allow my server to failover to another Router

I have this problem too.
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Correct Answer by cisco_lad2004 about 7 years 7 months ago

if you are using HSRP between RTR1 (with ISDN) and RTR2. you could have HSRP to track ISDN interface and make RTR2 active when ISDN fails, so no need to shut RTR1 Ethernet.

RTR1 & RTR2 needs to be on same VLAN.

There are other ways, but this is the most common one.

HTH

Sam

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Correct Answer
cisco_lad2004 Sun, 05/03/2009 - 01:22

if you are using HSRP between RTR1 (with ISDN) and RTR2. you could have HSRP to track ISDN interface and make RTR2 active when ISDN fails, so no need to shut RTR1 Ethernet.

RTR1 & RTR2 needs to be on same VLAN.

There are other ways, but this is the most common one.

HTH

Sam

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