Re: Will proxy-arp fix this incorrectly subnetted network?

On 23.05.2006 04:35 traceymtoner@xxxxxxxxx wrote

Barry Margolin wrote:
> So, the problem is that the 172.16.1.0 and 172.16.26.0 machines both
> have subnets of 255.255.0.0, so they do not think that they need to
> talk to a router to get to each other even though they do. My question
> is, will enabling proxy-arp on Eth0 on both routers fix this problem
> for me? Without moving IP networks or changing subnet masks everywhere.

Yes. Configure the subnet masks and routes correctly on the routers,
and proxy ARP will take care of routing the traffic transparently.

Thanks again for all your help, Barry. When you say "correctly", do you
mean that on the routers I should use 255.255.255.0 even though the
rest of the networks are set as 255.255.0.0 (which is incorrect for my
application)?


Correctly means that you have to set subnet mask and broadcast accordingly

e.g. for the C2610

!
interface FastEthernet 0/0
ip address 172.16.1.194 255.255.255.0
ip broadcast-address 172.16.255.255
!
! static route to the other network
!
ip route 172.16.26.0 255.255.255.0 10.1.2.1


--
Arnold Nipper, AN45
.

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