2600 Configuration Question

[MarineBean]

I have a CISCO 2600 (model 2621) which I am trying to configure to work in a residential environment. The “outside” of this router is connected to one of 4 ports available on the Actiontec MI424WR Verizon router. It is set up to issue an IP address to the CISCO, which it does correctly.

I am able to ping the “inside” and “outside” addresses from a workstation which is connected to the “inside”.

Additionally, I am able to ping the web (I used www.yahoo.com) successfully from the “inside” workstation. If I try to surf the net from that same workstation, I am unable to do so.

Done thus far:

FastEthernet 0/0

-          ip address = dhcp

-          no shutdown

FastEthernet 0/1

-          ip address = 192.168.10.1 255.255.255.0

-          no shutdown

Additional Instructions Issued:

-          ip routing

-          router rip

-          network = 192.168.0.0

Any suggestions you can provide, please do so at your convenience as this is purely as a hobby and not mission critical.

Thanks in advance.

[mmirrotto]

Alright, so you assigned your own 'internal' address. How does the Verizon router know how to get to this network? I see you are running RIP, are you sure the Verizon router runs RIP??? If you can ping an outside address from the Cisco router but not from the workstation, that would tell me the V router doesnt know how to get to the 192. address.

[MarineBean]

So if I understand you correctly, packets are getting out but the responses are not getting back, is that correct? If so, then I need to define a route from the Verizon router to the Cisco Inside Interface. Correct?

Also, if the Verizon router doesn't run RIP, should I then disable it on the CISCO?

[mmirrotto]

Yes. You could put a static route to the 192.168.10.0 / 24 network into the verizon router, be sure to point it to the 'next hop' which in this case would be the Cisco router interface you labeled "outside" in the diagram. I would turn RIP off, it is not needed. Then on the Cisco router just put a default route (ip route 0.0.0.0 0.0.0.0 x.x.x.x) where x.x.x.x is the verizon router interface - not the internet interface of the verizon router.

[MarineBean]

Okay... I did as we discussed which resulted in a ping to www.yahoo.com

resulting in a response from a device on the 192.168.1.0 subnet.

I wish I had access to CISCO SDM to configure this router. I've pleaded with CISCO,

explaining who I am and what I am doing but to no avail.

If I had it, I could configure the router to work and then do a SHOW RUNNING-CONFIG

to see and understand exactly what the configuration looks like.

[Chris Johnson]

If the verizon router is already handing out private ips to your cisco router, it should already be taking care of nat for you. Just take out the nat and put in the routes like stated above and you should be fine.

Sent from Cisco Technical Support iPhone App

[MarineBean]

What is the correct command to remove NATting?

[Chris Johnson]

You can just remove the NAT overload statement