SGN= parameter for procedures
Use the SGN= parameter in procedure to specify whether the sign-on verification function is active. Valid values are F, G, M, N, Y, and Z.
- F
- Specifies that the MTO cannot negate the activation of the sign-on verification function.
- G
- Includes options F and M.
- M
- Specifies that a single user ID can sign on to multiple terminals. If the user structure name is
different than the user ID for an IMS ETO user (DFSSGNX0 exit
returned a user structure name that is not the same as the user ID), SGN=M must be specified for
this user to be able to have multiple sign-on. SGN=M does not activate the sign-on verification
function.
The SGN= parameter has ramifications when specified on the first IMS to become active in an IMSplex. The SGN= value specified on that first active IMS is used (and enforced) for the entire IMSplex unless overridden by a /NRESTART or /ERESTART command. For example, if the first IMS to connect to the IMSplex has single sign on specified, this particular IMSplex requires all IMS systems that later connect to this IMSplex to also have single sign on specified. Similarly, if the first IMS to connect to the IMSplex has multiple sign on specified, this particular IMSplex requires all IMS systems that later connect to this IMSplex to also have multiple sign on specified.
If IMS systems try to join the IMSplex and they have a different value specified on the SGN= parameter, IMS issues an error message. For example, if IMSA connects to IMSplex1 first (with SGN=G) and then IMSB connects to IMSplex1 (with SGN=Z), an error message is issued.
If all the IMS systems in the IMSplex leave that IMSplex, then the first IMS to rejoin the IMSplex sets the SGN= value.
Important: Implementing multiple sign-on (SGN=M) requires a cold start of IMS. - N
- Specifies that the sign-on verification function is not to be activated unless overridden by the MTO. For a cold start, this implies that signon verification security is not going to be in effect.
- Y
- Specifies that the sign-on verification function is to be activated unless overridden by the MTO.
- Z
- Includes options Y and M.