Oh that was the default for the entire intranet, but since I'm slicing my little network up, it no longer applies. I'll need a GATEWAY for the VSWITCH? Why? It can't get to the outside world, only other hosts in the VSWITCH. (I would think that any IP address in the network 10.1.20.128 would be sent to the VSWITCH adapter. Or am I misunderstanding you?) That brings up a good question, should something larger than 1500 be used for a VSWITCH? We are using a MTU size of 57344 (don't know where that came from). Sorry for the suprises (they were unintended for the sake of brevity). Frank M. Ramaekers Jr. Systems Programmer; MCP, MCP+I, MCSE & RHCE American Income Life Insurance Company Phone: (254) 761-6649 Fax: (254) 741-5777
________________________________ From: The IBM z/VM Operating System on behalf of Alan Altmark Sent: Thu 11/12/2009 12:21 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: TCP/IP and VSWITCH On Thursday, 11/12/2009 at 08:34 EST, "Frank M. Ramaekers" <framaek...@ailife.com> wrote: > Oh yes, I have complete control of 10.1.20.0/24. Within this I have > only about 6 addresses assigned (and all <128). So, I decided to subnet > it to 10.1.20.0/25, giving me two nets of 126 addresses. The >128 would > be the internal (to the z9) addresses and the <128 external. "I've been Franked!" is now added to my lexicon. Any *more* surprises? :-P The above does not match your configuration. You were showing subnet masks of 255.255.0.0, which precludes the subnetting you describe above. Oh, and you WILL need a GATEWAY statement in order to force the stack to take the indirect route: <external IP> HOST <internal IP> VSW0 0 (The MTU of zero causes it to use the MTU specified on the LINK VSW0 statement.) Alan Altmark z/VM Development IBM Endicott _____________________________________________________ This message contains information which is privileged and confidential and is solely for the use of the intended recipient. If you are not the intended recipient, be aware that any review, disclosure, copying, distribution, or use of the contents of this message is strictly prohibited. If you have received this in error, please destroy it immediately and notify us at privacy...@ailife.com.
