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New Member

Can this HSRP work?


Can this scenario work?

Assuming I have a flat network, a computer with 2 NICs and are connected to 2 different routers. I configure the routers to run HSRP between them. But the routers do not have any layer 2 or layer 3 interconnects between each other.

Can HSRP work this way?


Re: Can this HSRP work?

HSRP only works when the routers can exchange hello's over the shared layer2 where the HSRP function is required.

It is therefore unclear to me what you are trying to achieve although I am afraid that it will not work the way you assumed/hoped



Hall of Fame Super Silver

Re: Can this HSRP work?

I agree with Leo that the description of what you want to do is a bit confusing. If we understood the situation better we might be able to give better advice.

But I believe the key statement in the original post was that there is no layer 2 or layer 3 connectivity between the routers. If this is true then there is no way that HSRP could work.



Re: Can this HSRP work?

Leo is correct in that HSRP won't actually be working do to the fact that it can't exchange hellos. Both routers will think that they are the primary.

If your looking at trying to get a redundant setup here is how you would have to set your equipment up. Router A would be connected to switch A which would be connected to switch B which would be connected to RTR B. Your computer with the two nics would then have one connected to switch A and one connected to Switch B



Re: Can this HSRP work?

What if we created a network bridge between the two lan adapters on the PC / Server. Would it be possible then ?

Just trying to get my fundamentals cleared as to if L2 broadcasts and multicasts will be sent across on a bridged network connection ?


New Member

Re: Can this HSRP work?


If you bridge the 2 links together via the PC; providing layer 2 connectivity between both routers for the HSRP traffic it should work. However,

If one of the NICs fails, or the Bridge becomes inoperable, both HSRP interfaces would become active.