The vswitch can handle only the guests of the zVM. It is thought as simplification of the real network access of the zVM guests. The guest system thinks it has a real OSA interface and the routing to the LAN is done transparently by the zVM CP. If I understand you correctly up to now you route all your traffic from the zVM world to the LAN via real hiper sockets and zOS to your OSA. If you have any data in z/OS which you need to access in zLinux on zVM (e.g. DB2) then you should preserve the hiper socket to zOS because it is the fastest access method that you can have to zOS resources. For the traffic from zLinux to the LAN you should config the vswitch by sharing your OSA between zOS-LPAR and zVM-LPAR or dedicating a separate OSA to zVM. I would never send all the traffic from the LAN via zVM to zOS because firstly it is slower and secondly if zVM fails or you have to shutdown zVM for whatever reason you cannot reach your zOS.
In short 1. remain the zOS OSA as it is for access from the LAN 2. remain real hipersocket interface between zOS and zVM as it is for communication between your zOS and the zLinux guests e.g. DB2 access (If you haven't the requirement yet, it may occur at a later time) 3. define vswitch in zVM for direct LAN access from your zLinux guests There is several information on the redbook site on setting up a vswitch. Here is the link http://www.redbooks.ibm.com/cgi-bin/searchsite.cgi?query=vswitch Hope this helps Franz Josef Pohlen ----- Original Message ----- From: "Adam Thornton" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, January 11, 2006 6:56 PM Subject: Re: [VMESA-L] Can Z/VM 4.4 handle IQDIORouting? > On Jan 11, 2006, at 11:15 AM, Bob Heerdink wrote: > > > I'm not sure I understand the entire issue, but my MVS sysprog has an > > interesting idea. I showed him VSWITCH article by Mark & Bruce in the > > Sept 2004 z/Journan mag but I'm not clear what to do myself. > > > > "Right now I have a Z/OS lpar that is managing a OSA express card > > that is > > attached to our lan network. > > This lpar routes packets to the hipersocket network which z/vm and the > > linux systems are a part off. > > > > > > I would like to eliminate that Z/OS lpar and run the OSA express > > from Z/VM. > > I looked at the tcpip manuals for the V4.4 we have and it does not > > mention > > the parms required to do the routing. I do not know if a V5 Z/VM > > would be > > able to handle it. > > It was that IQDIORouting of the IPCONFIG statement I showed you. > > > > I read some of the books on the vswitch you mentioned but I am not > > sure how > > it works or if it would be better than the hipersocket approach." > > > > > > Any suggestions? > > If you really mean, "get rid of the z/OS LPAR" then you just give the > OSA to z/VM, set up TCPIP as a controller for a VSWITCH that uses the > OSA, and give every guest a virtual OSA adapter coupled into the > VSWITCH. > > If you need to preserve routing to z/OS, then I'd set up an external > network route sending traffic to z/OS via z/VM, and use a physical > HiperSocket with both z/VM and z/OS on it. This introduces another > hop to z/OS. > > Adam > >
