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Webcast-Catalyst9k
New Member

Configuring 2 Router Interfaces to the same subnet

Hi There,

I have the following setup: Border router which has a serial interface connected to the ISP and 2 internal FE interfaces which need to be connected to 2 different switches in the LAN-side for redundancy. Of course, the 2 FE interfaces should have addresses from the same subnet; but when I try to assign those interfaces different IP addresses from the same subnet an error message reading Overlap in IP addresses appear to me.

The question is how can I assign the 2 interfaces different addresses from the same subnet to achieve redundancy? Thanks!

Regards,

Haitham

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Configuring 2 Router Interfaces to the same subnet

hi Haitham

on the following link you can find configuratiion example.

http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094663.shtml

remember to rate the post if it helps

regards

Devang

3 REPLIES

Re: Configuring 2 Router Interfaces to the same subnet

hi haitham

you need to configure the bridging between two ethernet interface and also have to configure the bridge virtual interface. with the help of bridging you can have both the interface in same subnet.

if you want any help then you can reply ...

rate this post if it helps

regards

Devang

New Member

Re: Configuring 2 Router Interfaces to the same subnet

Hi Devang,

Thanks for the reply, can you please redirect me to a document that talks about this and provides a configuration example on this topic?

Thanks,

Haitham

Re: Configuring 2 Router Interfaces to the same subnet

hi Haitham

on the following link you can find configuratiion example.

http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094663.shtml

remember to rate the post if it helps

regards

Devang

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