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| PM7354 S/UNI Duplex GE Preview Monolithic IC for ATM to Ethernet Interworking at GE Wire Speed FEATURES * The S/UNI DUPLEX GE is a monolithic integrated circuit supporting wire speed ATM to Ethernet inter-working at GE rates. It provides the AAL5 SARing, queuing/buffering, traffic management, address translation, and multicast functions necessary for interfacing an ATM Utopia Level 2/POS-PHY Level 2 interface to 10/100/1000 Ethernet interfaces. * The extended (up to 144 ports) Utopia Level 2 bus is designed to accommodate the higher line densities typical of ADSL DSLAMs. The dual Ethernet integrated SERDES accommodates backplane applications where a 1:1 redundant Ethernet interface is required. A separate parallel Ethernet port creates the high performance local interface needed for packet add/drop applications such as IGMP snooping. www..com INTERFACES * Dual fully integrated, 1.25Gbit/s, 8B10B encoded 4-wire LVDS SERDES interface for connecting the internal GE MACs directly to a high-speed, redundant serial back-plane or external PHY. * An additional (R)GMII / (R)MII parallel Ethernet interface, which can also be configured as two RMII interfaces. * One 52 MHz, 16 bit Utopia Level 2 interface (Tx and Rx), extended to support up to 144 PHYs as per ATM Forum Utopia Level 2 specification afphy-0039.000, Appendix 1. This interface is also configurable as a SATURN compliant 52-MHz, 16-bit POS-PHY Level 2 interface (Tx and Rx) * One asynchronous 16 bit CPU interface for device configuration and alarm/status monitoring. * One 32-bit SDRAM interface supporting up to 2 Gbits of packet buffering. Configurable as either DDR-I or DDRII. APPLICATIONS * Ethernet DSLAM: ADSL/VDSL line cards and WAN uplink card * ATM DSLAM: FE or GE WAN uplink * ATM multi-service switch: GE interface cards * Router: ATM line cards * Wireless base station: ATM to Ethernet interworking. ETHERNET TO ATM PROCESSING * Receives Ethernet frames from both SERDES interfaces and the parallel interface simultaneously. Uses frame filtering to drop redundant traffic received on the protection SERDES interface. * Uses VLAN tag (802.1q VLAN address + 802.1p QoS bits) to identify traffic as unicast or multicast, and to identify destination port and class. * SERDES to UL2/PL2, parallel Ethernet to UL2/PL2, SERDES to parallel Ethernet and parallel Ethernet to SERDES switching are all supported. * For traffic directed to the UL2/PL2 interface, performs RFC2684 compliant AAL5 segmentation for origination of up to 576 ATM AAL5 VCs. Ethernet to ATM VCI/VPI mapping provided via a software configurable internal lookup table. * Performs IP/Ethernet packet level multicast using wire-speed packet replication. Unicast and multicast traffic is queued independently and is merged onto the egress port via the egress traffic scheduler. Head of line blocking is avoided completely. * Software configurable congestion management policies implementing Early Packet Discard & Partial Packet Discard (EPD/PPD) or weighted random early packet discard (WRED) during periods of egress port congestion. BLOCK DIAGRAM RAM Interface DDR GES Ingress Enet In L1RPP RMAC MSTAT Enet to AAL5 IWF EFAM ASDS Traffic Managment AAL5 to Enet IWF ARHM QS600E Enet In L1RPP RMAC MSTAT Enet to AAL5 IWF EFAM ASDS Enet Out TXSLICE CSU GEP Egress L1TPP OXA3 TMAC GPMII MPB Egress MSFF L1TPP TMAC GES Egress RCTL RXSLICE QMGR GEP Ingress GPMII Enet In L1RPP RMAC MSTAT Enet to AAL5 IWF EFAM ASDS QS600E AAL5 to Enet IWF AAL5 to Enet IWF ARHM ARHM Enet Out QS2M MPB Ingress ATM In AMAP MSFF IXA3 Multicast QS576A ATM Out ARMAP JTAG MDIO uP MSFF MCAST PMC-2040392 Issue 1 PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE (c) Copyright PMC-Sierra, Inc. 2005 All rights reserved. PM7354 S/UNI Duplex GE Monolithic IC for ATM to Ethernet Interworking at GE Wire Speed * Software configurable, QoS aware egress traffic scheduling from the 576 unicast or multicast traffic queues into 72 UL2 ports, up to 8 queues per port. Optionally configurable to 144 ports, 4 queues per port. * Supports a "cells in frames" mode on a per VLAN basis in which received Ethernet frames have their 53 byte PDU extracted and used directly as the ATM cell to be queued at the UL2 interface. * RFC2684 compliant AAL5 reassembly of Ethernet PDUs. Termination of up to 576 ATM AAL5 VCs. 8 reassembly queues per UL2 port for 72 ports, 4 reassembly queues per port for 144 ports. * Reassembled packets can be directed to either the parallel or SERDES Ethernet interfaces, selectable on a per reassembly queue basis. * All traffic sent to the SERDES interfaces is duplicated and sent to both SERDES links as required, for a 1:1 protected backplane. * Optionally, traffic sent to the two SERDES interfaces can be replicated and sent to the parallel Ethernet interface. Inline filtering can then be performed to drop/pass packets on a selective basis. The parallel and SERDES interfaces have independent filtering. * Software configurable, QoS aware and source port fairness aware egress traffic scheduling from the 576 packet reassembly queues into the Ethernet interfaces. * Configurable congestion management policies implementing Early Packet Discard & Partial Packet Discard (EPD/PPD) or weighted random early packet discard (WRED) during periods of congestion on the Ethernet port. * OAM cells arriving at the UL2/PL2 receive interface can be dropped or wrapped in their own Ethernet frame and sent to the parallel or SERDES Ethernet interfaces. * Supports a "cells in frames" mode on a per-VC basis where each received ATM cell is wrapped in its own Ethernet frame and sent to either the SERDES or parallel Ethernet. www..com ATM TO ETHERNET PROCESSING * Polls and receives ATM traffic from up to 144 logical ports on the UL2 interface. TYPICAL APPLICATIONS S/UNI DUPLEX GE INTERFACES IN GE MODE DDR-I / DDR-II SDRAM Interface (167-200MHz) S/UNI DUPLEX GE INTERFACES IN FE MODE DDR-I / DDR-II SDRAM Interface (167-200MHz) POS-PHY L2/ Utopia L2 (72/144 ports) or S/UNI Vortex mode (264 ports) External Buffer I/F ATM I/F PM7354 S/UNI Duplex GE Config/status I/F WAN I/F 2 x GE SERDES (working + protection) Local I/F (R)GMII/(R)MII POS-PHY L2/ Utopia L2 (72/144 ports) or S/UNI Vortex mode (264 ports) External Buffer I/F ATM I/F PM7354 S/UNI Duplex GE Config/status I/F WAN I/F RMII Local I/F RMII 16 bit P Interface 16 bit P Interface S/UNI DUPLEX GE BASED MODULAR IP DSLAM ARCHITECTURE UL2 DSL PHY 72 Lines/ card * * * GMII PM7354 S/UNI Duplex GE Ethernet Switch RM9x2x PM8374A DualPHY 1G DSL PHY MPIF MII Optional Ethernet WAN Card MSP 2006 MSP 2006 DSL Line Cards xN To Remote DSLAM GE / FE PHY Switch Card (Working and Protect) Subtending Line Card PM7354 S/UNI Duplex GE PM7326 APEX PM7325 ATLAS ATM PHY Optional ATM WAN card for ATM Uplinks Head Office: PMC-Sierra, Inc. 8555 Baxter Place Burnaby, B.C. V5A 4V7 Canada Tel: 1.604.415.6000 Fax: 1.604.415.6200 To order documentation, send email to: document@pmc-sierra.com or contact the head office, Attn: Document Coordinator All product documentation is available on our web site at: http://www.pmc-sierra.com For corporate information, send email to: info@pmc-sierra.com PMC-2040392 (V1) (c) Copyright PMC-Sierra, Inc. 2005. All rights reserved. For a complete list of PMC-Sierra's trademarks and registered trademarks, visit: http://www.pmc-sierra.com/legal/ PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE |
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