I have vswitch setup on the IFL with Linux images and the TCP/IP stack
connected to it.  All seems to work well.

                                                 OSA                   
     OSA
                                                    |                  
             |
                                               Vswctrl1                
  Vswctrl2
                                                    |                  
             |                                                      
__________________________|________________|_______________________________________
       |                      |                            |           
            |                      
Linux22            Linux40                Linux41             TCP/IP

Now I'm planning for the 390 side.  It currently looks like:


                                     OSA
                                        |
                                    TCP/IP
                                        |
___________________________________________________________________________
|                             |                                 |      
                          |                            |                
  
VSE1                VSE2                         VSE3                  
       VSE4                  CMS           


My first cut would be to bring up VSWITCH and connect TCP/IP to the
VSWITCH LAN.  And then stop right there.  My older VSE systems can't
connect to a Guest LAN.  The VSE/ESA 2.7 systems can.  So I will migrate
them from connection to TCP/IP to the Guest LAN at a later date.

But the question is...

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.

Thanks

Tom Duerbusch
THD Consulting

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