Recovering a lost CTC connection

Red Hat Enterprise Linux 9.2 LPAR mode z/VM guest

If one side of a CTC connection crashes, you cannot simply reconnect after a reboot. You must also deactivate the interface of the peer of the crashed side.

Before you begin

These instructions apply to CTC interfaces only.

Procedure

Proceed as follows to recover a lost CTC connection:

  1. Reboot the crashed side.
  2. Deactivate the interface on the peer.
  3. Activate the interface on the crashed side and on the peer.

    If the connection is between a Linux® instance and a non-Linux instance, activate the interface on the Linux instance first. Otherwise, you can activate the interfaces in any order.

Results

If the CTC connection is uncoupled, you must couple it again and reconfigure the interface of both peers with the ip command.