Matt, Each card can handle up to 256? (I think) device numbers. Define them, then assign them to each Linux guest like this (assuming a device number range of 0F00-F0F): Guest 1: 0F00,0F01,0F0A Guest 2: 0F02,0F03,0F0B Guest 3: 0F04,0F05,0F0C Guest 4: 0F06,0F07,0F0D Guest 5: 0F08,0F09,0F0E
Or something along those lines. You need to do it this way to avoid "wasting" device numbers, since the device address for each guest must start on an even address boundary. Now, the _virtual_ addresses that your guests see can all be the same, for every guest. Gives a certain uniformity to system setup. So each guest could have it's OSA addresses be 0F00,0F01,0F02. Mark Post -----Original Message----- From: Matt Lashley/SCO [mailto:[EMAIL PROTECTED] Sent: Thursday, August 07, 2003 12:42 PM To: [EMAIL PROTECTED] Subject: OSA, VLAN and Linux guests I'm studying the picture on page 161 of the OSA-Express Implementation Guide http://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65 f/78796993019dfafe85256c38006f1d4e?OpenDocument&Highlight=0,osa Right now I have a two levels of routers/firewalls in out penguin farm. One single "master" router on the top level and four second level routers/firewalls for each of the guest lans. The master level router has the OSA dedicated to it via the VM user directory. I want to get rid of the master level router because it does burn quite a few cycles handling all the traffic and with the coming virtual switches in VM 4.4 (yahoo!) I think a redesign and a re-think of our external network interface is needed. So, page 161 shows a picture of four Linux machines connected to a single OSA (port). Since the OSA supports trunking and zLinux can handle it as well, I want to set up VLANs - like in the picture. How do I share the OSA between four (or more) Linux guest images? Are we talking IODF/IOCDS changes? Creating more CHIPDs/devices to be deicated to each Linux? When I read the text, the implementation doesn't jump out at me. Thanks, Matt Lashley Idaho State Controller's Office
