Hal, No need to vary the console offline. Depending on your Deferred Host Disconnect(DHD) parameter setting different actions will take place. If the DHD option is set to disable then the operating system will be immediately notified of the disconnect and it will vary the device number from a console status to an online status. If you then reconnect you will need to vary the device number back to a console.
Any other value for DHD will cause the ICC to discard messages sent to the client. It then reports back to the operating system that the WTO or WTOR was successful. If you reconnect the client within the DHD time period a 3270 CLEAR key interrupt is sent to the operating system and the session resumes. There are some things to be aware of if you set the DHD parameter to not timeout. First make sure the consoles are set to R mode instead of RD mode. If set to RD mode and disconnected for a long period the screen could fill up with action messages and cause a buffer shortage. Some of this is discussed in IBM APAR II14150. You also need to check your LOGON settings for consoles. If you require a user to logon to the console then you could have someone else inherit the information on the next reconnect. It is also stated by IBM that if you also use the console device number as the NIP con then you should not set the DHD parameter to no timeout as a subsequent system IPL could hang. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Hal Merritt Sent: Wednesday, January 20, 2010 11:35 AM To: [email protected] Subject: ICC Consoles In the bad old days of consoles connected over bisync bailing wire circuits, one had to be careful to vary a console off line before disconnecting. We saw that again with the 2074 and Visera protocol converters, and the situation was worse because the PC's used for consoles tended to crash or the emulator closed by accident. The result was console buffers filling and causing management grumpiness. Now there are ICC consoles, and we have some experience that suggest that these consoles need not be varied offline before, say, rebooting the PC. Anyone care to comment as to whether the consoles need to be varied or can be simply left alone? Thanks. NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
