All JES2 members of a multi-access spool node must specify the same value for the OWNNODE= and NODENUM= parameters on the NJEDEF statement in each of their initialization data sets. They must also have identical node definition parameters as specified on the NODE(nnnn) initialization statement, including the node name.

In the network in Figure 1, node 2 is a multi-access spool configuration with the symbolic name WASHDC. There are 2 members active on node 2 (SYSA and SYSB), each of which has an active NJE line to node 1 (NEWYORK).

Figure 1. Multi-Access Spool Configuration (BSC)

In this configuration, there is one NJE connection between node 1 and node 2. This connection connects NEWYORK member 1 with WASHDC member 1. There are two active NJE links for one NJE connection; this is considered a multi-trunk connection. The link with the lower resistance is considered to be the primary trunk. In Figure 1, line 2 is the primary trunk because its resistance (60) is less than line 1's resistance (70). The resistance of the primary trunk (60) is associated with the NJE connection that is sent into the network. Data is sent on whatever link is available.