Restrictions on MIH timer value that apply when using Fibre Channel Endpoint Security for Mainframe

Provisioning Guide for Mainframe Systems for VSP One Block 85

Version
10.5.x
File Size
1619 KB
Audience
anonymous
Part Number
MK-26VSP1B034-03
ft:lastEdition
2026-06-23

When bringing a channel path online using Fibre Channel Endpoint Security for Mainframe, it might take longer to complete the channel path online process than when Fibre Channel Endpoint Security for Mainframe is not used.

For this reason, when using Fibre Channel Endpoint Security for Mainframe, set the Missing interrupt handler (MIH) timer value for the device to one minute or longer.

After the channel path is brought online, it is acceptable to change the MIH timer value to less than one minute.

If the MIH timer value cannot be set to one minute or longer, the message "IOS071I *MASTER*, START PENDING" might be output when bringing the host path online, and then the channel path for the device indicated in the message might be in the status of LOGICALLY OFF, PHYSICALLY ON.

Message output example

23246 12:56:31.61          00000090  IOS071I 2F00,A2,*MASTER*, START PENDING 309

Example of path status that applies when the problem occurs

23246 12:58:13.76 JOB05135 00000290  DS P,2F00
23246 12:58:13.77 INTERNAL 00000090  IEE459I 12.58.13 DEVSERV PATHS 358
                       358 00000090   UNIT DTYPE  MD CNT VOLSER CHPID=PATH STATUS
                       358 00000090        RTYPE  SSID CFW TC   DFW PIN DC-STATE CCA DDC       CYL CU-TYPE
                       358 00000090  02F00,33903 ,F ,000,      ,A0=- A1=- A2=* A3=-
                       358 00000090  ************************ SYMBOL DEFINITIONS ************************
                       358 00000090  F = OFFLINE                        * = LOGICALLY OFF, PHYSICALLY ON
                       358 00000090  - = LOGICALLY OFF, PHYSICALLY OFF

If the message "IOS071I *MASTER*, START PENDING" is output when the channel path is brought online, use the following procedure to bring the channel path online. For more information about the commands used during the procedure for bringing the channel path online, see the IBM® documentation.

The following is the procedure for bringing the channel path online.

  1. Verify the path status for the device for which the message "IOS071I *MASTER*, START PENDING" is output by using the DS P command.
  2. If the path status is LOGICALLY OFF, PHYSICALLY ON, perform step (a) to bring the channel path online.

    The same problem might also occur when the channel path is brought online by using step (a). In that case, perform step (b) to bring the channel path online.

    1. Take the channel path for the device in the status of LOGICALLY OFF, PHYSICALLY ON offline, and then bring it back online.
    2. Bring the channel path for the device in the status of LOGICALLY OFF, PHYSICALLY ON online by using the V PATH command.