You can connect to type 2.1 PUs that are not in your network but instead are in a nonnative network. You can use the XNETALS start option or code the XNETALS operand on the GROUP, LINE, or PU statement, to network qualify any LUs that you connect to in a nonnative network.

If XNETALS is resolved to YES at the PU level, VTAM® uses the NETID of the PU (rather than the VTAM network identifier) as the network qualifier of the LU name. For example, in Figure 1, XNETALS is resolved to YES at the PU level and the LU in the attached type 2.1 peripheral node is recognized by VTAM as AS400.LU even though the network identifier of the subarea network is SANETX.

Figure 1. Nonnative network type 2.1 connection

Coding the NETID operand on the PU definition statement is optional (VTAM determines the network ID if not specified). However, if you specify XNETALS=YES, code the NETID operand if you want VTAM to perform dial-out operations to establish a session.

If XNETALS is resolved to NO at the PU level, and you do not code the NETID operand on the PU definition statement, VTAM assumes all connections are native unless the PU is a dependent LU server (DLUS) PU or a dependent LU requester (DLUR) PU. For information about DLUS and DLUR, see Dependent LU server.

If you code the NETID operand on the PU definition statement and XNETALS=NO is specified for the PU, the PU NETID must match the VTAM NETID.