RE: TCP/IP Question

Here's the answer (with help from IBM support):

The test system needed a route statement naming the production system's virtual Ethernet address as the next hop to the crossover's subnet...

The PC server needed the same thing, with the production system's crossover address named as the next hop to the virtual Ethernet subnet...

The final piece was turning on IP datagram forwarding on the production system via CHGTCPA IPDTGFWD(*YES).

Cheers!

- Charlie

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of tkreimer@xxxxxxxxxxxxxxx
Sent: Thursday, May 07, 2009 10:54 AM
To: Midrange Systems Technical Discussion
Subject: Re: TCP/IP Question

You would have to setup the Primary partition as a "router". Problem is, I
don't remember how/where to do that. Then you could add route to the test
partition to send all crossover traffic to the virtual interface, with the
primary partition as the gateway. I am fairly certain the routing
information is out there, but don't have time to look myself.

=====================
Tom Kreimer
Network Manager
Buckhorn Inc, Milford OH



From:
Charlie Prothero <Charlie.Prothero@xxxxxxxxxxxx>
To:
"'Midrange Systems Technical Discussion'" <midrange-l@xxxxxxxxxxxx>
Date:
05/06/2009 10:10 PM
Subject:
TCP/IP Question
Sent by:
midrange-l-bounces@xxxxxxxxxxxx



Hi, all! I have a question that seems simple but may not be:

A V5R4 iSeries has 2 LPARS, Production and Test, with a virtual Ethernet
between them.

Each partition also has its own connection to the main network.

The Production LPAR has an ADDITIONAL direct connection (crossover cable)
from another NIC to a PC server (will be running FTP). That connection is
up and working.

The main network is class B, 10.0.x.x
The Virtual is class C, 192.168.0.x
The crossover is class C, 10.100.100.x

I would like the test partition to be able to hit the PC server through
the virtual Ethernet, but I'm not sure how to get them to route (setting a
route on the test side to the production virtual Ethernet address wasn't
enough).

Easy, hard or impossible?

I know I could replace the crossover cable with a switch and use three
physical connections, but it would be cool and use fewer parts to do it
through the virtual.

Thanks!




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