1.5 NMVT Routing

When SNAP-IX receives an NMVT from a remote node, it uses the MS major vector key and the destination application name subfields of the NMVT to determine to which MS application to send the NMVT in the following order of preference:

1. SNAP-IX attempts to find an NMVT-level application that has registered with an application name matching the NMVT's destination name, in the following order of preference:

   1. An application that has registered to accept the specific major vector key carried on the incoming NMVT

   2. An application that has registered to accept SNA Service Point Command Facility (SPCF) keys, if the major vector key is in the range 0x8061-0x8064

   3. An application that has registered to accept all keys

2. If SNAP-IX cannot find a suitable NMVT-level application, SNAP-IX attempts to find an MDS-level application that has registered with an application name matching the NMVT's destination name and has registered to accept NMVTs after conversion to MDS_MUs. The order of preference for selecting an application that can accept the appropriate major vector key is the same as for NMVT-level applications.