The GRNAME system initialization parameter specifies the z/OS® Communications Server generic resource name, as 1 through 8 characters, under which a group of CICS® terminal-owning regions in a CICSplex register to z/OS Communications Server.
The following restrictions apply when specifying the GRNAME parameter:
APPLID=CICSHTH1
GRNAME=CICSH###
would register to
z/OS Communications Server
with the applid CICSHTH1 and the generic resource CICSH###. Other LUs in
the same sysplex can communicate with the CICS region either through the generic
resource or the applid.However, care should be taken with LU6 connections initiated from this side (such as AUTOCONNECT(YES)) because the bind will now contain the generic resource name and may fail if the partner only knows this region by the applid. Binds initiated from the partner are examined to identify the name by which the partner knows this region (generic resource or applid), thus allowing the appropriate connection to be built. For information about defining connections, see Installation considerations for z/OS Communications Server generic resources.