I can't see LAN interface on same subnet . .

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Dec 23rd, 2008
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I'm configuring a cisco 871. The WAN has the IP It has default gateway, wich is the LAN iface of a inet GW. The thing is that we want to reach another LAN iface, the But I can't reach that interface. Do you know why ? We have the same configuration in a very similar environment, and it works. We divide the outgoing traffic dividing the network with netmasks. 1 part to 1st gw and the other part to the 2nd. I don't know why I can't even reach the LAN interface of the other router.

Thanks a lot.

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John Blakley Tue, 12/23/2008 - 09:20
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Where is the other LAN interface From the router, can you ping and get a response back?



godzilla0 Tue, 12/23/2008 - 10:15
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Yes, I get response from That's the loopback right ? The interface it's supossed to be in the same switch of all the other LANs. So, even without a route, I should see it, I guess, it's switched ! The only thing that could be wrong is the fact that we are troubleshooting remote, and I don't know if it's really seeing the other ifaces phisically.

Could it be another thing before decide that is not phiscally connected ?

John Blakley Tue, 12/23/2008 - 12:00
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  • Purple, 4500 points or more is Verizon's DNS servers. Is your address in a DMZ? Are you hosting something on that server, and you're trying to NAT to it? Since you're "troubleshooting remote", can the other side get out to the internet? Can this one host ( get on the internet?


godzilla0 Wed, 12/24/2008 - 00:30
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I think that subnet is reserved ip address space for private outside addresses, but I am not sure.

letsgomets Tue, 12/23/2008 - 11:09
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What is the subnet mask configured on the and the subnet mask configured on the

If they are both connected to the same switch are the switch ports configured for the same VLAN?


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