HP 1606 FICON Administrator's Guide v6.4.0 (53-1001771-01, June 2010) - Page 47

Setting the MIHPTO value 3 1. Connect to the switch and log in using an account assigned to the admin role. 2. Enter the ficonCupSet modereg command to set the FICON CUP mode register bits for the local switch. Example of setting the mode register bit HCP to off: switch:admin> ficoncupset modereg HCP 1 Mode register bit HCP has been set to 1. Example of setting the mode register bit ACP to on: switch:admin> ficoncupset modereg ACP 1 Mode register bit ACP has been set to 1. Setting the MIHPTO value You can set missing interrupt handler primary timeout (MIHPTO) and this value determines how long the channel will wait before timing out an expected response from the CUP. This value is part of the data returned to the host when it reads the configuration data, but the host is under no obligation to adhere to this value. The actual value that the host will use before detecting a timeout can be set by the system programmer (overriding the value returned by the switch). The ficonCupSet MIHPTO command can be used to increase, decrease, or display the MIHPTO value that the CUP returns to the host when configuration data is read. Changing the MIHPTO value requires that the CUP control device be varied offline from the host, as the host will not automatically be notified when the value is changed. The host will normally read the new value, using the Read Configuration Data command, when the CUP is varied back online. The MIHPTO setting will persist across reboots, POR, and failovers. Setting this value to the upper end of the time range will allow the CUP more time to process requests during intervals of peak usage, without causing the host to detect timeouts. It is recommended that the value be set to 180 seconds in a SAN with B- and M-Series switches. The default value is 180 seconds. 1. Connect to the switch and log in using an account assigned to the admin role. 2. Enter the ficonCupSet MIHPTO command and set the value between 15 and 600. Persistently enabling and disabling ports for CUP When FMS mode is enabled, you cannot use the portCfgPersistentEnable and portCfgPersistentDisable commands to persistently enable and disable ports. Instead, use the following procedure. 1. Connect to the switch and log in using an account assigned to the admin role. 2. Enter the ficonCupShow modereg command to display the mode register bit settings. 3. Verify that the ASM bit is set on (1). 4. If the ASM bit is set off (0), enter the ficonCupSet modereg asm 1 command to set it on. In the following example, the ASM bit is shown as being off and then it is set to on. switch:admin> ficoncupshow modereg POSC UAM ASM DCAM ACP HCP 1 0 0 0 1 1 FICON Administrator's Guide 35 53-1001771-01