General Description

The BCM52311 Knowledge-Based Processor (KBP) performs

high-speed operations on large-rule databases for a wide

range of telecommunications applications, including WAN,

MAN, and Enterprise switches and routers. It provides network

awareness and enables real-time modifications and updates to

the routing configuration, making it ideal for packet

classification, policy enforcement, and forwarding.

This family of KBPs addresses next-generation classification

requirements through high-performance parallel decisions and

improved-entry storage capabilities. Up to eight parallel

operations allow the device to reach decision speeds of

multiple billion decisions per second (BDPS). Embedded error

correction circuitry (ECC) improves system testability and

operational reliability. The key processing unit (KPU) enables

efficient interface transfers with flexible search key

construction.

This KBP seamlessly connects to the Jericho BCM88670,

Arad Plus BCM88660, and Arad BCM88650.

Features

 Dual host enables two host devices to connect to one KBP.

 Connectivity provided to NPUs that can produce search

keys through two independent ports.

 Device available in 2048k/1024k/512k 40b database

entries.

 KBP tables are width configurable to 80/160/320/480/640

bits.

 User data array for associated data, width configurable as

32/64/128/256 bits.

 Up to eight parallel searches enabling up to eight results

per operation.

 Simultaneous multithreading (SMT) operation.

 NetRoute forwarding solution for longest prefix match

(LPM).

 NetACL solution for access control list.

 Logical tables provide support for intelligent database

management.

 Key processing unit (KPU) for flexible search key

construction.

 Result buffer provides programmability for flexible routing

of search results.

 Range matching for efficient storage utilization.

 ECC on user data and database array. Parity protection on

all embedded memories.

 Background ECC scan for database entries with provision

for 1b auto correction and 2b error detection.