The NSE4256 is a Network Search Engine (NSE) with a database capacity of 256K IPv4 36-bit entries. The device also supports entry sizes of 72-bits, 144-bits, 288-bits, and 576-bits. Multiple database entry widths are supported allowing for various table sizes while preserving 100% table utilization.
NetLogic Microsystems' network search engines perform high-speed parallel search operations on databases. They allow for up to 83 million searches per second, providing network awareness and updates/modifications, making them ideal for packet classification, policy enforcement, CIDR forwarding, MPLS searches, ATM searches and/or QoS enforcement for differentiated services in core, edge, campus and enterprise networking applications.

• Configurations: Max of 256K standard 36-bit IPv4 records
• Multiple entry width support (intra-device configurable)
• Local Mask bit associated with each NSE bit
• Clock rates: 125/100 MHz
• Sustained search rates of up to 83 million/sec for up to 144-bit words
• 72-bit Comparand I/O Bus, 32-bit Results bus, and 16-bit Instruction bus
• Comparand I/O Bus can interface with 36-bit or 72-bit bus
• Results can be read through CBUS
• Eight Configuration Registers
• Depth-expansion with no glue logic
• Low power dissipation
• Latency invariant cascading scheme
• 1.5V/2.5V LVCMOS; 388-pin PBGA package