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參數(shù)資料
| 型號： | PRS28G |
| 廠商： | IBM Microeletronics |
| 英文描述： | Packet Routing Switch For Multigigabit-Per-Port Switch Solution(網(wǎng)絡(luò)通信用信息包通路轉(zhuǎn)換開關(guān)) |
| 中文描述： | 對于分組千兆路由交換機(jī)每端口交換解決方案（網(wǎng)絡(luò)通信用信息包通路轉(zhuǎn)換開關(guān)） |
| 文件頁數(shù)： | 2/2頁 |
| 文件大?。?/td> | 111K |
| 代理商： | PRS28G |
by combining the s
witch’s two on-chip
sub-switch elements.
This approach,
which reduces the number of input and
output ports to eight, is an economical
solution for building small ATM switches
with OC-48 port speed.
Speed expansion can also be achieved
by combining two Packet Routing Switch
PRS28G chips externally. This approach
doubles the chip’s four serial I/O data
paths to support port speeds of 3.5
Gbps on all 16 ports. In this configura-
tion, which enables ATM protocol engine
applications at OC-48 speed, the
Packet Routing Switch PRS28G core
can operate at 56.8 Gbps.
Configurations incorporating external
speed expansion also permit an
increased fixed packet size from 64 to
80 bytes, up to 128 to 160 bytes, in 8-
byte increments. This flexibility, in
conjunction with packet concatenation,
improves overall throughput of the switch.
The IBM Packet Routing Switch
PRS28G
provides additional scalability through
port expansion. This capability, which
supports single stage and multistage
switch designs, gives manufacturers the
flexibility to design systems that make
the most business sense for their
applications. The single stage method of
port expansion is well suited for ATM and
IP switching where throughput is of prime
importance. The multistage method is
ideal for applications, such as connected
processors, that require extensive
connectivity and experience light traffic.
Redundancy support for high
availability
To increase availability, switch fabrics are
often designed with two redundant planes.
If an element in one plane fails, the other
plane is available to take over. The IBM
Packet Routing Switch PRS28G sup-
ports this crucial redundancy capability.
G522-0156-01
*07G522015601*
Specifications
Supply Voltage
3.3 V +/- 5% and 1.5 V +/-5%
Power
15 W @ 100%
Max. Junction Temperature
0
°
to 100
°
C
Package Size
624-pin E-CCGA; 10.4 mm x 10.4 mm
Each Packet Routing Switch PRS28G
element access manager has two links
to the switch core—one to each
plane—and a packet filtering function.
The built-in filtering mechanism acts as a
redundancy control while the dual links
from the switch element access man-
ager to the switch core provide the
means for loss-less switchover.
Serial interface chip available
For manufacturers who are building
chassis-based systems requiring a high-
speed interconnect across a backplane
or short cable distances, IBM offers the
IBM Packet Routing Switch Serial
Interface. This companion chip is a
simple interface that converts the data
aligned serial link interface to a Utopia
3-like parallel interface. It enables traffic
managers that support 32-bit parallel
interfaces to connect to a redundant
switch fabric based on the Packet
Routing Switch PRS28G.
Development tools expedite
time-to-market
Packet switch controller software and a
reference switch core are available from
IBM to help reduce manufacturers’
development time and cost. The
software offerings, which include the IBM
Primary Switch Controller (PSC) software
and IBM Secondary Switch Controller
(SSC) software, operate the switch
subsystem control layer. The 56-Gbps
reference switch core supports single-
shelf switch designs where the port
adapter line rates are the same as the
switch port speed. The reference switch
core is well-suited for a redundant 16-
port OC-48 ATM switch or a layer 2 and
above design that supports 32- to
64-port Gigabit Ethernet.
For more information visit our Web site at
www.chips.ibm.com
.
Copyright IBM Corporation 1999, 2000
All Rights Reserved
Printed in the United States of America 5-00
The following are trademarks of International
Business Machines Corporation in the United States,
or other countries, or both:
IBM
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Other company, product and service names may be
trademarks or service marks of others.
All information contained in this document is subject
to change without notice. The products described in
this document are NOT intended for use in
implantation or other life support applications where
malfunction may result in injury or death to persons.
The information contained in this document does not
affect or change IBM's product specifications or
warranties. Nothing in this document shall operate as
an express or implied license or indemnity under the
intellectual property rights of IBM or third parties. All
information contained in this document was obtained
in specific environments, and is presented as an
illustration. The results obtained in other operating
environments may vary.
THE INFORMATION CONTAINED IN THIS
DOCUMENT IS PROVIDED ON AN “AS IS” BASIS.
In no event will IBM be liable for damages arising
directly or indirectly from any use of the information
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IBM Microelectronics Division
1580 Route 52, Bldg. 504
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The IBM home page can be found at
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.
The IBM Microelectronics Division home page can
be found at
www.chips.ibm.com
.
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