A P P L I C A T I O N S :
TeraStream can be used in many applications, including:
- Access and Edge Routers
- Enterprise Backbone Switch
- 3G Wireless Gateway
- Storage Area Networking
- Remote Access Boxes
- Core Routers
- Multi-Service ATM Platforms
T E R A S T R E A M D I A G R A M :
INTELLIGENT SWITCH FABRIC FAMILY
TeraStream
H I G H L I G H T S :
Highly Integrated, Two-Chip Set for Reduced
Implementation Cost
- Integrated Queuing and Scheduling
- Integrated SerDes
Single-Stage Aggregate User Bandwidth of up to 160 Gb/s
- Full Duplex Ports
- 2X Backplane Speed-up
- Maximum Configurations of up to 16x 10 Gb/s Ports, 64x2.5
Gb/s Ports, or any Combination of 2.5 Gb/s and 10 Gb/s Ports
Sophisticated QoS
- 16 Programmable Classes of Traffic
- Advanced Unicast and Multicast Support
- Virtual Output Queues (VOQs)
- Strict Priority or Weighted Round Robin Scheduling
Algorithms
High Availability with Zero Loss of Traffic During
Redundant Switchover
- Integrated Redundant SerDes for 1:1 Redundancy
- Hot Swappable
- Automatic or Software-Controlled Switchover
Field-proven, High-Speed Serial Link (HSSL) Technology
TeraStream
Chip Set (VSC871 & VSC881) 160 Gb/s Intelligent Switch Fabric
TeraStream
Packet
Exchange
MatrixTM
TeraStream
Packet
Exchange
MatrixTM
TeraStream
Packet
Exchange
MatrixTM
TeraStream
Packet
Exchange
MatrixTM
TeraStream
Queuing
Engine
Line Card
CSIX
Active Switch Card
Active Switch Card
Redundant Switch Card
High Speed Serial Links x 8
Redundant
High Speed Links x 8
x16
CSIX OC-192
Interface
CSIX OC-48
Interface
High Speed Serial Links x 8
Redundant
High Speed Links x
8
TeraStream
Packet
Exchange
MatrixTM
TeraStream
Queuing
Engine
TeraStream
Packet
Exchange
MatrixTM
TeraStream
Packet
Exchange
MatrixTM
TeraStream
Packet
Exchange
MatrixTM
Line Card
CSIX
CSIX
CSIX
CSIX
PB-TERASTREAM-002
For more information on Vitesse Products visit the Vitesse web site
at www.vitesse.com or contact Vitesse Sales at (800) VITESSE
or sales@vitesse.com
2002 Vitesse Semiconductor Corporation
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
TeraStream
The TeraStream
product is a third
generation Intelligent Switch Fabric using
Vitesse's proven high-speed serial link
technology. This product consists of the
VSC871 Queuing Engine and the VSC881
Packet Exchange Matrix
TM
, and supports
aggregate user bandwidths of up to 160Gb/s
with port speeds reaching 10Gb/s.
High Integration Reduces Overall Cost
Manufactured on a 0.18
m CMOS process, the TeraStream
chip set integrates advanced queuing and scheduling, a
synchronous serial crossbar, and multiple SerDes in a dual-
chip fabric architecture. The TeraStream fabric is a low-
power solution with the capability of powering-down unused
serial links. Transmission between each line card and one or
more switch cards is conducted entirely in-band via the
integrated SerDes. This results in a high-performance, cost-
effective switch fabric with a low overall chip count to minimize
power, design complexity and board space requirements.
High Performance and Scalability
The TeraStream Packet Exchange Matrix supports 32 high-
speed, self-clocking serial links, each operating at a
maximum user data rate of 2.5Gb/s. Multiple chips can be
combined to increase the overall port bandwidths to support
dense system configurations such as 64x64 OC-48 and 16x16
OC-192. In addition, the TeraStream switch fabric protects the
user's line card investment with a seamless upgrade option to
future members of the TeraStream family of switch fabrics.
Efficient Bandwidth Utilization
The TeraStream solution is a self-routing switch fabric with
logical backplane link rates at twice the user port bandwidths
(2X speed-up), Virtual Output Queuing (VOQ), and sophisticated
Quality of Service (QoS) mechanisms to ensure non-blocking
performance.
The fabric supports both unicast and multicast traffic, each
with 16 discrete classes of traffic partitioned between strict
priority and weighted bandwidth allocation. Multicast traffic
is replicated in the TeraStream Packet Exchange Matrix to
optimize ingress link bandwidth utilization.
High Availability
The TeraStream switch fabric offers several features designed
to simplify on-site replacement or upgrades. The 1:1 redundant
switch core protection scheme supports both automatic
hardware switchover for link failure conditions as well as
software-controlled hitless switchover for field maintenance.
The fabric employs fail-safe, hot-swappable buffers that
permit line cards to be removed or inserted into a live
backplane without damage. To assist in error detection, each
Queuing Engine's primary and integrated redundant serial
links have independent self-synchronizing link circuitry and
link health monitoring.
Proven Technology Minimizes Risk
The TeraStream Switch Fabric uses proven high-speed serial
link technology to communicate across the backplane,
leveraging Vitesse's experience in real-world, high-speed
semiconductor transceiver technology. TeraStream can
interface with Vitesse's or any CSIX-compatible, third party
traffic manager or network processor. Application notes,
reference system design documentation, and experienced
support teams are available to accelerate development times
and ensure first-pass system success.
G E N E R A L D E S C R I P T I O N :
TeraStream
Chip Set (VSC871 & VSC881) 160 Gb/s Intelligent Switch Fabric
VSC871
VSC881
Description
Queuing Engine
Packet Exchange Matrix
Process Technology
0.18
m CMOS
0.18
m CMOS
Package Information
957 FCBGA
957 FCBGA
Maximum Power Dissipation
17.3W
23.5W
Core Supply Voltage
1.8V
1.8V
I/O Supply Voltage
2.5V or 3.3V
2.5V or 3.3V
Serial Link Speed
2.125 - 2.644Gb/s
2.125 - 2.644 Gb/s
High-Speed Serial Channels
8 active + 8 redundant
32
Specifications:
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