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New Member

Port redundancy in Router

I have a single router with 2 ethernet ports,both are connected two seprate switches both are in same network.Usually both switches r connecting to the router through ethernet port 1,ie switch2 will connects to sw1 and that to eth1.when the eth 1 fails I want sw 1 to connect to sw2 and eth2 should come up with the same ip.how will I configure this for port redindancy?Can I use HSRP for this?

5 REPLIES
Cisco Employee

Re: Port redundancy in Router

Hi Gladwin,

You cannot configure HSRP on same router and you need to have minimum 2 routers for the same.

But I believe what you can do as a workaround is configure port channel on your router and assign an ip address to the port channel and you can assign the 2 physical ports on your router eth1 & 2 to that port channel.

On the switch also you can have a layer 2 etherchannel and cofigure the 2 ports in same etherchannel bundle.

HTH

Ankur

New Member

Re: Port redundancy in Router

Hi Ankur

Thank you for your reply.

Will that port channel configuration work for a layer2 link?If so will it give me redendency between the ports?Or is it only for load balancing?

Regards

Gladwin

New Member

Re: Port redundancy in Router

Will it work for a l3 link?

Cisco Employee

Re: Port redundancy in Router

Hi Gladwin,

Yes port channel is for layer 3 which you will configure on router and etherchannel is for layer 2 which you will configure on layer 2 switch connected to router.

This will also give you redundancy as well as load balacing.

So if one port of router or switch goes down traffic will still keep passing.

HTH

Ankur

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Re: Port redundancy in Router

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