Datasheet > IDT89TTM553BL

IDT89TTM553BL

更新时间： 2024-09-17 14:51:31

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
30页	566K
描述
Telecom IC

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IDT89TTM553BL 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
Reach Compliance Code：	unknown	风险等级：	5.87
Base Number Matches：	1

IDT89TTM553BL 数据手册

89TTM553

Preliminary Information*

Traffic Manager Co-processor

Data Sheet

Description

89TTM55x Features

◆

Deterministic performance at 10 Gbps wire-speed (35 Mcps)

regardless of the number of flows, traffic size, and patterns.

The 89TTM553 is a flow-based traffic management co-processor

that can be used in conjunction with the 89TTM552.

Up to 256 megabytes of external memory buffer space

(equivalent to a 210 ms buffer at 10 Gbps).

It has two major functional parts: the queue manager (QM) and the

FLQ scheduler. The QM is responsible for all the non-bandwidth func-

tions, which include managing up to 1 Million queuing structures,

handling cell and packet arrivals and departures from these queues, and

maintaining a database of congestion management and statistics

parameters for each flow queue (FLQ). The FLQ scheduler is respon-

sible for managing the FLQ bandwidth functions.

Support (Rx and Tx) for industry-standard SPI-4 phase 2,

NPF Streaming Interface, and CSIX over LVDS.

Hierarchical queuing and precise scheduling:

–

Traffic management flexibility.

Support for up to 4K aggregate flow queues (AFQs), 1K port

queues (PQs), 2K arrival reassembly queues (ARQs), and 1K

output queues/channels (OQs) with no external memory

required. Configurable AFQ-to-port assignments.

Support for up to 1M discrete flows (FLQs), with queuing for

each flow, using external memory. Configurable mapping of

FLQs into aggregate flow queues.

Two-level FLQ scheduling mode that supports up to 128K or

256K virtual pipe or subscriber queues with up to 8 or 4 CoS

priority queues each.

The 89TTM553 FLQ scheduler supports traffic scheduling on up to

1M discrete flows. In addition to the scheduling levels provided by the

89TTM552, the 89TTM553 provides one or two levels of additional

scheduling hierarchy. It also provides guaranteed minimum rate,

maximum rate capping, excess rate distribution using weighted fair

queuing (WFQ), byte rate shaping, and dynamic configuration adjust-

ments.

–

The 89TTM553 stores all the flow-based parameters (and state infor-

mation) that are made available to the 89TTM552 for flow-based

processing. When the 89TTM553 is used with the 89TTM552, conges-

tion and bandwidth management features are enabled at the flow level

as well as at the aggregate-flow level.

Accurate byte-rate shaping at the FLQ, AFQ and port levels.

◆

Multiple levels of buffer congestion management.

–

Hierarchical queue structure and thresholding.

Congestion indication.

Dynamic adjustment of thresholds during periods of congestion.

Packet discard (PD).

Weighted random early discard (WRED).

Local congestion indication (CI).

–

IDT and the IDT logo are trademarks of Integrated Device Technology, Inc.

1 of 30

March 3, 2005

DSC 6797

*Notice: The information in this document is subject to change without notice

12 3 4 5 6 7...30

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