If I update one VM to 5.4 before another running 5.2, can one be layer 2 while the other is layer 3? Each is sharing the same physical OSA, but different addresses.
While I am installing the new VM 2nd level I have it connected to my 1st level vswitch. Can the 2nd level vswitch be layer 2 while the 1st level switch it is connected to is layer 3? On Wed, Dec 10, 2008 at 4:29 PM, Alan Altmark <alan_altm...@us.ibm.com>wrote: > On Wednesday, 12/10/2008 at 08:39 EST, RPN01 <nix.rob...@mayo.edu> wrote: > > I attempted this yesterday, and I haven?t searched the archives yet, so > if this > > has been gone over, I apologize. > > > > Looking through the books, it would appear that the changes needed to go > from > > layer 3 to layer 2 protocol would be to add ?ETHERNET? to the vSwitch > > definition, and to add ?ETHERNET? to the DEVICE description in the > profile > > TCPIP file. Now, as you may well have guessed by the fact that I?m > posting this > > message, doing this didn?t produce desirable results. I.E. The > connection doesn? > > t ping or work in any other useful way. > > There is no ETHERNET option on the DEVICE statement, so you're probably > getting configuration errors and the device isn't activating. Check the > TCPIP console log. In z/VM 5.4 there is an ETHERNET statement on the LINK > (type QDIOETHERNET) statement. This capability is not in z/VM 5.3. > > > Do I need to talk to the network people? Is there something they need to > do in > > the OSA, or on the network? Have I missed something in the > configuration? Do I > > need to check for more current maintenance? (Right now, this is on z/VM > 5.3... > > Soon to be 5.4) > > Layer 2 vs. 3 is set entirely within the OSA by the host. There's nothing > for your networking people to do. Remember, however, that with Layer 2 > the virtual MAC address will appear on the REAL network. Therefore it > must be unique within the LAN segment. With a single VM system you're ok, > but with two or more systems on the same LAN segment, you need to use the > MACPREFIX in SYSTEM CONFIG to set the prefix to be unique. > > Alan Altmark > z/VM Development > IBM Endicott > -- Mark Pace Mainline Information Systems 1700 Summit Lake Drive Tallahassee, FL. 32317
