ATM-specific network interface (PNNi) is an ATM network signaling protocol, which provides a mechanism - supporting QoS-based upgrade ATM routing and swap to swap virtual connection SVC between SVCs.
PNNI is a hierarchical routing protocol for dynamic link states. It supports large-scale networks. The PNNi protocol implements its information transfer process via VPI / VCI 0.18. In addition, in the case of multiple networks, the PNNI establishes a network connection through signaling information. Based on UNI 4.0 and Q.2931, the PNN can support the route selection process of PNNi after adding a specified information element in UNI 4.0. PNNI signaling includes dynamic establishment, maintenance, and clearance ATM connections on a private network interface or network node interface between 2 ATM networks or 2 ATM network nodes. The PNNi Signaling Protocol is established on the ATM Forum UNI specification and Q.2931.
PNNi information includes: signal, call, notification, installation, release, fully release, notification, status, status query, request, request acknowledgment response, status, addition section, add part recognition response, partial signal, add part refuse, At the end, the end portion admits the response.
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