Network Node Interface


Also found in: Acronyms.

Network Node Interface

(networking)
(NNI) The ATM Forum's specification for connections between network nodes. NNI makes network routing possible. It typically refers to backbone trunk connections between ATM switching equipment.

See also: UNI.
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New features for the LightStream 2020 enterprise ATM backbone switch include high performance multicast service utilizing point-to-multipoint connections; application-specific Quality of Service, which extends ATM bandwidth-allocation functions to Ethernet and FDDI networks; T1/E1 circuit emulation, which permits the connection of PBX, TDM and video conferencing across an ATM network using constant bit-rate services; and a frame relay network node interface, which allows the LightStream 2020 to connect to other vendors' frame relay switches.
Key new software and hardware features, available in August as part of the Cisco Internetwork Operating System (Cisco IOS) for ATM are: T1/E1 circuit emulation, application-specific quality of service for integrated LAN ports, high-performance multicast service, a frame relay network node interface, a topology map and a new eight-port T3/E3 interface card.
As the first ATM switch to support the Phase 0 Private Network Node Interface (P-NNI) protocol adopted by the ATM Forum, HyperSwitch is the only complete ATM solution based on ATM Forum standards.

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