Rule Writing Guidelines › Suggested Rules for Sensitive Commands › COUPLE Command

COUPLE Command

For two virtual machines to establish Virtual Channel-To-Channel Adapters (CTCAs) for data transfer, they both must issue the DEFINE command. (For information about the DEFINE command, see the DEFINE and DETACH Command section.) As soon as both machines establish virtual CTCAs with DEFINE, you can issue the CP COUPLE command from one of the machines to the other for CTCA data transfer.

With CA ACF2 for z/ VM command limiting, you can log and prevent the use of COUPLE to control the use of CTCAs for data transfer between two virtual machines. To implement command limiting for the CP COUPLE command, you must create a command limiting rule set with a $KEY of COUPLE. For example, to audit CTCA data transfers between virtual machines, LOG access permission is required.

$KEY(COUPLE)
 - UID(-) LOG