Comment # 20 on bug 1094575 from Michal Kube��ek

(In reply to LTC BugProxy from comment #19)
> ------- Comment From ursula.braun@de.ibm.com 2018-06-01 02:55 EDT-------
> Try "vmcp couple 0800 to SYSTEM VSWNL2".

Different error message but it doesn't seem to do much difference:

------------------------------------------------------------------------------
s390vsl205:~/:[1]# vmcp det nic 0800
NIC 0800 is destroyed; devices 0800-0802 detached
s390vsl205:~/:[0]# vmcp def nic 0800 type qdio devices 3
NIC 0800 is created; devices 0800-0802 defined
s390vsl205:~/:[0]# vmcp couple 0800 to SYSTEM VSWNL2
HCPCPL2788E NIC 0800 not connected; already connected to VSWITCH SYSTEM VSWNL2
Error: non-zero CP response for command 'COUPLE 0800 TO SYSTEM VSWNL2': #2788
s390vsl205:~/:[1]# vmcp -b 4k q v nic
Adapter 0700.P00 Type: QDIO      Name: UNASSIGNED  Devices: 3
  MAC: 02-00-00-00-01-07         VSWITCH: SYSTEM VSWN1
Adapter 0800.P00 Type: QDIO      Name: HYD1G1      Devices: 3
  MAC: 02-00-00-00-42-CD         VSWITCH: SYSTEM VSWNL2
  MAC: 02-00-00-00-01-08         Device: 0802 Current
------------------------------------------------------------------------------

After a reboot, system is unreachable through network (and for some reason,
serial console doesn't work any more so I couldn't find more).