SYSIBM.LUNAMES

SYSIBM.LUNAMES maps Db2 location names to the LU names of remote systems. It also maps Db2 location names to the security and mode requirements for conversations with those systems.

SYSIBM.LUNAMES must contain at least one row for each remote group, depending on the access method that is used.

For member-routing access, the LINKNAME column of the row should contains the group's generic LU name.
For group-generic access, the LUNAME column of the row contains the group's generic LU name.
For single-member access, the LINKNAME column of the row contains a link name.

The GENERIC column of SYSIBM.LUNAMES is for the specific use of data sharing group members that act as requesters. Its value indicates whether a requester uses the group's generic LU name or its own real LU name when identifying itself to a remote subsystem. If you want a requester to use the group's generic LU name, specify a value of Y; if you want a requester to use its own LU name, specify a value of N.

Important: The value of the GENERIC column is ignored if the Db2 GENERIC LUNAME parameter on installation panel DSNTIPR is blank. In this case, Db2 requesters are identified to remote systems by their own LU names.

Be aware that only one member of a data sharing group can access a remote system by using the group's generic LU name. If one member of a group is already connected to a remote system and is using the group's generic LU name, subsequent connections to that remote system by other members of the same group use the requesters' own LU names.