FEATURES

? Single-chip multi-channel packet processor supporting line rate throughput transfers of packet sizes from 40 to 9.6 Kbytes, for up to an aggregate of 336 T1s, 252 E1s, or 12 DS-3s.

? Provides simultaneous support of PPP, Frame Relay, Multilink-PPP and Multilink-Frame Relay protocols. Alternative protocols supported via HDLC termination and full packet store of the data within the HDLC structure.

MULTILINK PPP AND FRAME RELAY BUNDLES

? Capable of supporting fragment sizes from 1 to 9.6 Kbytes.

? Support for 3 egress fragmentation sizes (128, 256, and 512 bytes) configurable on a per multilink bundle. Optionally full packet transfers are supported on a per bundle basis.

? Supports up to 168 multilink bundles with up to 12 member links per bundle. These bundles are composed of independent HDLC channels.

? Support for up to 100 ms of intra bundle skew in the receive direction when supporting the minimum. fragment size.

? Support for PPP header compression as per RFC 1661.

PPP

? Support for 16 COS levels in accordance with RFC 2686.

? Either 12 bit or 24 bit sequence number, with short and long fragment header formats, is supported.

? Link Control protocol packets are identified by the PID as control protocols and will be forwarded to the Any-PHY interface.

FRAME RELAY

? Link layer address lookup can be performed based on HDLC channel and 10 bit DLCI for HDLC channels supporting Frame Relay protocols.

? The lookup algorithm can support a maximum of 16 K connection identifiers (CIs) amongst multilink FR bundles. The connection identifiers are ignored in singlelink FR channels.

? Control frames are identified and forwarded to Any-PHY interface.

? 12 bit sequence numbers supported.

? FECN, BECN, and DE ingress processing as per FRF.12.

APPLICATIONS

? IETF PPP interfaces for routers.

? Frame Relay interfaces for ATM or Frame Relay switches and multiplexers.

? Internet/Intranet access equipment.