On Monday, 01/26/2009 at 01:31 EST, Mark Pace <[email protected]> wrote: > Yes, that is exactly what I'm saying. But I thought I had asked that question > before and that the z9 took care of that problem.
Yes, you did ask. On the z890 and up (with reasonably current OSA microcode) layer 2 and layer 3 are visible to each other. If they weren't you couldn't ping. (BTW, Cisco switches will not echo a broadcast back to the same port on which it was received.) If you can ping, but you can't do a DNS lookup or ftp, then something else is at work. I would get a tcpdump (whether in the DNS guest or ftp guest) to see if they are the hosts that are being contacted. You may want to get a virtual sniffer trace via another guest with the extra authority to enter promiscuous mode. I note that DNS and FTP are "upper" TCP/UDP protocols while ping is a low-level IP protocol. If it were a new host, I'd suspect the imbedded firewall in the Linux guest. Alan Altmark z/VM Development IBM Endicott
