XCF_CF_SYSPLEX_CONNECTIVITY

Description:

Check that the required number of coupling facilities are defined in the CFRM policy and connected to all active systems in the sysplex.

Reason for check:

When running in a Parallel Sysplex® environment, IBM® recommends that hardware redundancy be provided for coupling facilities (that is, at least two usable coupling facilities in the configuration) and that those coupling facilities be connected to all active systems in the sysplex.

z/OS® releases the check applies to:

z/OS V1R10 and later.

Verbose support:

Yes. All coupling facilities defined in the CFRM active policy are included in the sysplex connectivity report when the check is run in verbose mode. You can remove a check from verbose mode using any of the following methods:

Specify the UPDATE,filters,VERBOSE=NO parameter either on the MODIFY command or in a POLICY statement in an HZSPRMxx parmlib member.
Overwrite the YES value with the NO value in the VERBOSE column of the SDSF CK command display.

Parameters accepted:

MINCFS(mincfs) is a required parameter indicating the number (in decimal) of coupling facilities that must be connected to all active systems in the sysplex. The number must be between 1 and 16 (inclusive).

User override of IBM values:

The following shows the default keywords for the check, which you can override on either a POLICY statement in the HZSPRMxx parmlib member or on a MODIFY command. This statement may be copied and modified to override the check defaults:

UPDATE CHECK(IBMXCF,XCF_CF_SYSPLEX_CONNECTIVITY)      
       SEVERITY(MED) INTERVAL(001:00) DATE('date_of_the_change')
       PARM('MINCFS(2)')                              
       REASON('Your reason for making the update.')            
       VERBOSE(YES)

Reference:

For more information, see:

z/OS MVS Setting Up a Sysplex
Achieving the Highest Levels of Parallel Sysplex Availability (http://www.redbooks.ibm.com/redbooks/SG246061)

Messages:

This check issues the following exception messages:

IXCH0220E

See the IXCH messages in z/OS MVS System Messages, Vol 10 (IXC-IZP).

SECLABEL recommended for MLS users:

SYSLOW