On Friday, 08/04/2006 at 10:21 EST, Tom Duerbusch 
<[EMAIL PROTECTED]> wrote:
 
> When I move the entire IP network from the TCP/IP stack and the VSE
> systems to run under a VSWITCH, will I have any routing problems that I
> need to address?  This is on a z/890 with z/VM 5.1.

When you move a network, the important characteristic is the topology, not 
the communication path.  That is, the *direction* the packets flow, not 
*how* they flow.

For example, say you have a bunch of virtual CTC connections between VM 
TCP/IP and your VSE guests.  They are in Subnet B.  VM TCP/IP also 
connects to the external network on Subnet A.  As long a VM TCP/IP remains 
as the routing "waypoint", you can change the VSE guests to a Guest LAN 
and not have any routing poblems.  Now, if you begin to add or delete 
waypoints, then you will have routing changes.  If you don't make those 
correctly, then you have problems.

I couldn't tell from your pictures (they were somewhat mangled) what was 
"Before" and what was "After".  Only by comparing those two can you tell 
if there are routing considerations.

Alan Altmark
z/VM Development
IBM Endicott

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