ProCurve 7203dl Problem

[Luisi]

Hi guys,

first of all I'm really new into networking. I'm trying to configure a procurve 7203dl router with the following scenario:

eth 0/1: 10.0.0.33 /24 (this IP is part of our office network which has Internet access).

eth 0/2: 11.0.0.33 /24 (LAN), DHCP.


I have no problems setting up the IPs. My goal is to access the Internet from 11.0.0.x network but I haven't been successful.

If I ping from 11.0.0.x to 11.0.0.33 obviously it responds and same thing pinging 10.0.0.33
But if I try to ping from 11.0.0.x to any other host on the 10.0.0.x network it would respond.

I'm attaching my config.

Any help would be appreciate it.

Cheers!

[PMCook · Accepted solution]

Did you mean "would not" respond, when pinging frm 11 to 10? Have you added a route? Have you tried this:

ip route 0.0.0.0 0.0.0.0 10.0.0.33

This will route everything to the 10.0.0.0 subnet. Since you are using NAT on the office network, your Internet router may not forward multiple networks through the NAT interface. Most of the little NAT gateways won't. They can only translate from one LAN to the WAN and only one subnet. You may need something more robust like a firewall.

[Luisi]

Thanks for your answer PMCook.
Yes I meant "would not" instead of "would".

What you explained before make sense as we have a really cheap Linksys router in our office.

I'd like to simplify the scenario:

eth 0/1 10.0.0.33 (10.0.0.0 /24)
eth 0/2 11.0.0.33 (11.0.0.0 /24)

ping from 10.0.0.34 (my PC) to 10.0.0.33 - OK
ping from 10.0.0.34 to 11.0.0.33 - OK
ping from 10.0.0.34 to 11.0.0.34 (a computer in that network) - not OK

I don't really get why it is not responding...

I've already added ip route 0.0.0.0 0.0.0.0 10.0.0.33 but still wont work.

Any help would be appreciate it!

Thanks!

[PMCook]

What happens when you try to ping to either side from the router itself? What is your gateway address on the computer with the 11.0.0.34 address? Sounds to me like your packets can't find their way back out of the router.

[Olaf Borowski]

Luisi,
if the two interfaces on the router (Eth0/1 and Eth0/1) have the ip address of 10.0.0.33 and 11.0.0.33, you have to set the default gateway address of the clients of the appropriate network to that address. Does 11.0.0.34 have it's default gateway set to 11.0.0.33? The IP route statement "ip route 0.0.0.0 0.0.0.0 10.0.0.33" is useless. It tells the router to send anything that is not local to 10.0.0.33. That's the router itself. With the 2 IP addresses on the interfaces, the router will route local traffic (between 10.0.0.x and 11.0.0.x). I suspect that you don't have the default gateway set correctly on your client. Can you ping 11.0.0.34 from the router?

Olaf

[Luisi]

It was a gateway problem, thanks both Olaf and PMCook.

I had to set up manually the gateway in the clients for both interfaces, otherwise they won't communicate to each other.

Thanks again, I appreciate your help guys.

Cheers!