networking (HPR) Routing designed to work in conjunction

with APPN Intermediate Session Routing (ISR) network

nodes. HPR nodes perform many of the same functions as ISR

nodes. For example, HPR nodes use the same method of

calculating routes based on the Topology Routing Service

database and class of service tables. HPR nodes also

supports such APPN features as connection networks and support

for parallel transmission groups (TGs). In the HPR

architecture, both partner nodes must support HPR for RTP

connections to take place between the nodes. If one node

supports HPR and the partner node does not, then the link will

support ISR functionality only.