Re: IP Helper-Address - two routers

[Carlos G Mendioroz <tron@xxxxxxxxxxx>]

There is no protocol in place to let R1 know that R2 will do the 
forwarding, so R1 should forward.
Same rule reversed applies to R2. So I would be surprised to learn that
only one forwards...

gladston@xxxxxxxxxx wrote:
> Say net A is connected to router 1 and router 2 via ethernet. Both routers are connected to router 3 via serial; a DHCP server is connected to ethernet of R3. Router 1 and 2 has the command 'ip helper-address' pointing to the DHCP server.
> Will both routers, R1 and R2, forward the DHCP request coming from a station on net A to the DHCP server? Or one of them will have this role?
>
> From my undertanding, there is no similar thing as an "ASSERT" message between router R1 and R2 so just one forward the DHCP request to the server.
> Any Thoughts?
>
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--
Carlos G Mendioroz <tron@xxxxxxxxxxx>