CSRES_AUTOQ_TIMEOUT

Description:

Checks if the configured resolver timeout value in the global TCPIP.DATA file exceeds the optimal setting when the autonomic quiescing of unresponsive name servers function is active.

Reason for check:

The default value for the RESOLVERTIMEOUT statement is 5 seconds. If the autonomic quiescing of unresponsive name server function is active, the resolver polls unresponsive name servers every six seconds. The resolver uses the value you specify or default for the RESOLVERTIMEOUT statement in the global TCPIP.DATA file to determine how long to wait for a response to the poll. If you specify a value for the RESOLVERTIMEOUT statement that is greater than 5 seconds, the resolver will be less efficient when polling unresponsive name servers.

z/OS® releases the check applies to:

z/OS V1R13 and later.

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(IBMCS,CSRES_AUTOQ_TIMEOUT)
DATE('date_of_the_change')
REASON('Your reason for making the update.')
PARM('TIMEOUT(5)')
ACTIVE
SEVERITY(LOW)
INTERVAL(ONETIME)

Debug support:

Verbose support:

Parameters accepted:

Reference:

For more information on AUTOQUIESCE resolver setup statement and RESOLVERTIMEOUT on the TCPIP.DATA file, see the AUTOQUIESCE and RESOLVERTIMEOUT sections inz/OS Communications Server: IP Configuration Reference.

Messages:

This check issues the following exception messages:

EZBH018E

See z/OS Communications Server: IP Messages Volume 2 (EZB, EZD).

SECLABEL recommended for multilevel security users:

SYSLOW - see z/OS Planning for Multilevel Security and the Common Criteria for information on using SECLABELs.