High-Performance Routing (HPR) allows you to migrate NCP connections to APPN connections without incurring the associated increase in storage and cycles. HPR uses a rapid transport protocol (RTP) connection to transport session traffic between session endpoints. HPR routes can also traverse an existing subarea network, as HPR support provides for the mapping of HPR routes over VR-based TGs between intermediate nodes.

HPR support is available only over APPN host-to-host channel connections and other type 2.1 channel connections. To use HPR over NCP you must have at least NCP V7R3.

Code HPR=YES to enable HPR support for a particular GROUP, LINE, or PU. HPR=YES is the default value. For a PU that has HPR enabled, code LLERP to specify the link-level error recovery procedures (LLERP) preference. For type 2.1 channels, the default value is LLERP=REQUIRED. For all other connections, the default value is LLERP=NOTPREF (LLERP is required by this PU only if the adjacent link station requires it.)