METROXS datasheet(1/3 Pages) EXAR

Part #	METROXS

Description	INDUSTRY-FIRST, 5G MULTI-SERVICE ACCESS PLATFORM

PDF	3 Pages

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Manufacturer	EXAR [Exar Corporation]

Direct Link	http://www.exar.com

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com

PRELIMINARY

METROXS

INDUSTRY-FIRST, 5G MULTI-SERVICE ACCESS PLATFORM

MARCH 2007

REV. P1.0.0

GENERAL DESCRIPTION

MetroXS is a complete carrier class 5G multi-service

access reference design that achieves Ethernet &

Resilient Packet Ring (RPR) transport over SONET/

SDH networks. MetroXS is composed of several

market-proven Exar devices: the EXtendAR 48

(XRT95L53) multi-protocol framer, and Exar's OC-48/

STM-16 SONET/SDH PHY (XRT91L80), plus a

channelized 5G Resilient Packet Ring (RPR) MAC,

and 4 GE/24 FE port Ethernet aggregator. In addition,

MetroXS includes Exar's unified software API

structure enabling system vendors to port their

innovative applications on this platform with ease.

The hardware supports point-to-point or ring network

configuration for the efficient and cost effective

transport of packet data. The data path of processing

elements is defined by a MPoS mapper (the

XRT95L53), a 5G BW RPR-MAC, and a 4-port triple-

rate Ethernet aggregation device. The RPR-MAC

east-side client port is sourced from the Ethernet

aggregator while the un-occupied client port may be

sourced from a third party network processor. The

configuration

and

control

of

these

data-path

processing elements is performed with an MPC866

SBC hosting embedded Linux 2.6.

The MetroXS software comprises of a suite of

embedded Linux 2.6 low-level device drivers and OS

transparent API for configuration and control of the

data-path. The stacked architecture lends itself for

easy portability of the device drivers and API across

other OS platforms. A PC hosted GUI client

communicates over a 10/100Base-Tx link with the

MetroXS CLI shim layer over the API. The software

suite also supports a diagnostic back-door serial port

during bring-up and debug for future system level

enhancements.

BENEFITS

• Best of SONET and Ethernet:

■ Fair access to ring bandwidth

■ Guaranteed BW allocation to high priority traffic

■ 50 ms ring protection

■ Optimized and cost-effective for data/cell based

traffic

• Flexible architecture supports multiple services:

■ TDM services with flexible and dynamic provisioning

■ Efficient transport of PDU traffic over NG SONET/

SDH

■ MEF E-Line Services

■ MEF E-LAN services

• Software:

■ Full suite of software:

■Embedded Linux 2.6 Low level drivers

■API for configuring and controlling Client, RMAC

& Transport

■ Optional higher layer software to implement a full-

featured RPR system

■ Highly portable software

■Platform independent API

■OS adaptation layer features

FEATURES

CLIENT SIDE FEATURES

• 4 10/100/1000 Base-Tx copper ports

■ IEEE 802.3x Flow control including jumbo frames

■ IEEE 802.1p Class of service, priority protocols

■ IEEE 802.3ad link aggregation

■ IEEE 802.1ad VLAN Stacking

• Traffic Engineering & QoS

■ Flexible BW Oversubscription up to 4:1 using

MDRR scheduling algorithm

■ Class of Service, CoS per port identified by

■IEEE 802.1Q VLAN tagging

■IEEE 802.1p with 8 queues per port

■IP DSCP field

■ Port based ingress traffic policing using TRTCM with

a granularity of 64Kbps

■ WRED based scheduling algorithm per queue

■ Port-based egress traffic shaping in 64Kbps steps

• Extensive RMON statistics

TRANSPORT FEATURES

• Supports 2xOC-48 SONET/SDH rings

■ Sub 50ms of failure recovery

• Efficient transport for multi-protocol PDUs: ATM,

Ethernet, LAPS, PPP, HDLC, GFP-F

• Compliant to G.7042 next-gen SONET/SDH for dynamic

bandwidth provisioning using VCAT/LCAS

• Support for GR-253 compliant alarms and performance

monitoring RPR FEATURES

• Compliant to IEEE 802.17

• RPR node Topology Database, 256 entries

• Supports Steering, and ringlet selection

• Supports 4 Class of Service

■ Class A0 (guaranteed bandwidth) & A1

■ Class B: B-CIR and B-EIR

• Supports rate limiting of Class A, B-CIR, B-EIR, C

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