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| 型號： | METROXS |
| 廠商： | Exar Corporation |
| 英文描述： | INDUSTRY-FIRST, 5G MULTI-SERVICE ACCESS PLATFORM |
| 中文描述： | 行業(yè)第一，第五代多業(yè)務(wù)接入平臺 |
| 文件頁數(shù)： | 1/3頁 |
| 文件大?。?/td> | 167K |
| 代理商： | METROXS |
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
PRELIMINARY
INDUSTRY-FIRST, 5G MULTI-SERVICE ACCESS PLATFORM
METROXS
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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