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Community Member

fa 0/1 to be used as back up interface

Hi

I need to configure my 2nd ethernet inteface to be an backup interface for the primary one as a backuplink which should come up when the first link has some physical issues. Can i use backup interface command for this , what will be the ip needed to configure for the backup interface (ip unnumbered primary interface)

Thanks for any suggestions

4 REPLIES
Community Member

Re: fa 0/1 to be used as back up interface

if you talking about switch it will be done by using etherchannel either layer 2 or 3

but if you work with router you can bridge the two interfaces.

rate if it is help you.

Community Member

Re: fa 0/1 to be used as back up interface

Hi

Iam talking about a router. I want to have one ethernet as a stand by for the other and start forwarding traffi when the first one fails.

Will bridging help in this case.

Thanks for your response

Community Member

Re: fa 0/1 to be used as back up interface

look in router you can't asign two interfaces with the same network if they work as layer 3 so by bridging them you just asign the configuration to the ogical interface created and the two phyiscal interfaces work as switch

Re: fa 0/1 to be used as back up interface

Hi Parthi

You can check out the tracking feature available in the router to achieve your requirement here.

http://www.cisco.com/en/US/products/ps6350/products_configuration_guide_chapter09186a008042fbeb.html

regds

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