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PMC-Sierra,Inc.
Preliminary
PM9311/2/3/5 ETT1TM Chip Set
Enhanced TT1TM Switch Fabric
FEATURES
The ETT1TM Chip Set provides a full 32port crossbar-based switch fabric. Shelves of physically separated linecards can be attached to the switch fabric by fiber optic links running the Linecard-to-Switch (LCSTM) protocol.
MANAGEMENT
* In-band management and control via Control Packets. These Control Packets are exchanged between the linecard and the switch core, and enable the linecards to communicate directly with the CPU that controls the switch fabric. * Out-of-band (OOB) management and control via a dedicated CPU interface. Every ETT1 device has an OOB interface that provides a CPU-based control and diagnostics interface. A single CPU can control every ETT1 device in a full fabric.
* PM9311-UC and PM9312-UC are in a 1088 ceramic column grid array (CCGA) package. PM9313-HC is a 474 ceramic ball grid array (CBGA). PM9315-HC is a 624 ceramic ball grid array (CBGA).
CONFIGURATIONS
* 320 Gbit/s aggregate full-duplex bandwidth with a typical configuration of 32 ports of OC-192c or 10 Gbit/s Ethernet. * Each port operates at a fixed rate of 25 million fixed-length cells per second. The user payload in each cell can be either 64 or 76 bytes. A 64 byte cell payload is equivalent to a 12.8 Gbit/s line rate. * Each port can be configured as: a) 1 channel of 25 million cells per second, appropriate for a single OC192c stream or 10 Gbit/s Ethernet, or as b) 4 channels of 6.25 million cells per second, appropriate for a quad OC-48c linecard.
DEVICE CONFIGURATION
The following illustration shows how the ETT1 devices are configured to create a complete fabric. Many instances of each device may be needed in a fabric. Shown are two fabric ports; each port would be connected to its own linecard(s). While every fabric port is fullduplex, the illustration only shows the ingress stream for the left port and the egress stream for the port on the right. The linecard sends cells to the ingress queues within the Dataslice devices. The EPP observes their arrival and issues requests to the Scheduler device. At some later time, the Scheduler will issue a grant back to the EPP. On receipt of the grant, the EPP instructs the Dataslice to send the cell at the head of the relevant ingress queue to the Crossbar. The cell passes through the Crossbar and is stored in the appropriate queue at the egress Dataslices. The egress EPP then instructs the Dataslices to send the cell to the destination linecard.
FAULT TOLERANCE
* Optional redundancy of all shared components for fault tolerance. A fully redundant fabric is capable of sustaining single errors within any replicated device without losing or reordering any cells. * Hot-swap support for live insertion/ removal of boards from an active system.
ADDITIONAL SPECIFICATIONS
* Provides a standard five signal P1149.1 JTAG test port for boundary scan test purposes. * 2.5V and 1.5V rails. CMOS I/Os are 3.3V tolerant (except JTAG I/Os)
SERVICES
* All configurations support four strict priorities of best-effort traffic for both unicast and multicast data traffic. * TDM service provides guaranteed bandwidth and zero delay variation with 10Mbit/s per channel resolution. Can provide Add-Drop type functionality or ATM CBR service. * Highly efficient cell scheduling algorithm together with the use of Virtual Output Queues and Virtual Input Queues provides near-outputqueued performance in conjunction with the fabric's internal speedup. * Efficient support for multicast with cell replication performed within the switch core. Up to 4096 multicast groups per port.
ETT1TM DEVICE CONFIGURATION
Ingress Flow from Linecard LCS Protocol Interface
1 of 32 ETT1 Ports
1 of 32 ETT1 Ports
Egress Flow to Linecard LCS Protocol Interface
Dataslice PM9313-HC
Crossbar PM9312-UC
Dataslice PM9313-HC
LINECARD SUPPORT
* Linecard-to-Switch (LCS) protocol supports a physical separation between switch core and linecards of up to 200 feet/70 m. * LCS provides a simple credit-based flow mechanism to avoid cell loss due to buffer overrun.
Enhanced Port Processor PM9315-HC
Flow Control Crossbar PM9312-UC
Enhanced Port Processor PM9315-HC
Scheduler PM9311-UC data cell flow control flow
PMC-2000411
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE
(c) Copyright PMC-Sierra, Inc. 2000
Preliminary PM9311/2/3/5 ETT1TM Chip Set
Enhanced TT1TM Switch Fabric
SYSTEM CONFIGURATION
The following illustration shows a complete switch, with 32 linecards connecting to the 32 port fabric. As shown, fiber links are used to interconnect the distant (up to 200 feet) linecards to the fabric. Alternatively, linecard silicon can interface directly to the ETT1 devices, if sufficient board space, power, thermal regulation, etc., is available.
APPLICATIONS
* ATM switches with 32 ports of OC192c, or up to 128 ports of OC-48c, or combinations thereof. * SONET Add/Drop Muxes. * IP switches with 32 ports of 10Gbit/s. * Any combination of the above.
SYSTEM CONFIGURATION
ETT1 Fabric Fabric Port 1
OC-192 Linecard
E/O and O/E
Fiber
E/O and O/E
SerDes (12 or 14)
EPP plus 6 or 7 Dataslices
Crossbar (14 or 16)
Redundant Crossbar (14 or 16)
Fiber Quad OC-48 Linecard E/O and O/E E/O and O/E
Fabric Port 32
Scheduler
SerDes (12 or 14)
EPP plus 6 or 7 Dataslices
Redundant Scheduler
CPU
Redundant CPU
Head Office: PMC-Sierra, Inc. #105 - 8555 Baxter Place Burnaby, B.C. V5A 4V7 Canada Tel: 604.415.6000 Fax: 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-2000411 (c) Copyright PMC-Sierra, Inc. 2000. All rights reserved. March 2000 ETT1, Enhanced TT1, and LCS are all trademarks of PMC-Sierra, Inc.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE

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