On Monday, 07/28/2008 at 11:08 EDT, Richard Clapper <[EMAIL PROTECTED]> wrote: > I thought I had seen somewhere that the Gateway IP Address for a Hipersocket > connection from either z/VSE, z/OS, z/VM, or even a Linux Guest should be > 0.0.0.0, with Mask 255.255.255.0. > > Is that documented somewhere? I can't find it! Or did I have a really good > dream? > > Would that also apply to a Guest LAN connection definition?
Every network segment, be it a CTC, Guest LAN, HiperSocket, Token Ring, Ethernet, whatever, has an assigned subnet. There is no "should be". There is only "as designed". Of course, the machine owner does not (typically) do the network design - sysprogs *implement* said design. ;-) There is no IP address 0.0.0.0, so you can't assign it to anything. In a routing table it is used to indicate a default route, but all the OSes have a platform-specific method of defining a default route (aka "default gateway"). So when talking to your network designer, tell him or her that your machine has 16 integrated and isolated LAN segments that can be used to connect any number of LPARs and/or z/VM guests together. (We call them HiperSocket chpids.) Each z/VM's Guest LAN (as many as you want) provides an isolated LAN segment. All of them require a "virtual router" to get data to/from the physical network. The Virtual Switch does not require a virtual router. Alan Altmark z/VM Development IBM Endicott
