Introduction
With the expanding Internet, all levels of the network must become faster. This requires high-speed packet searches, which are essential for routing, but also necessary for higher-level functions such as Quality of Service (QoS) support and access control. To meet this need, IDT has developed network search engines that accelerate packet processing at OC-192 data rates and beyond.

Device Description
The 18M NSE with Dual LA-1 interface is intended to work with NPUs having a Look Aside Interface. Multiple devices including the 18M Dual LA-1 NSE can be connected to the same LA-1 interface. Each 18M Dual LA-1 NSE device may be optionally point-to-point expanded up to eight NSE devices.

NSE Features
■ 256K x 72 (18M) Data and Mask cells
■ Full Ternary Content Addressable Memory
■ Supports up to 250 Million searches per second
■ Dynamic Database Management™
   - Configurable Database widths
   - Databases are selectable per NSE command
■ Programmable Power Management
   - Only the selected Database consumes power
   - PowerSave logic provides additional power savings
■ Lookup (Search) Instructions
   - Standard Lookup
   - Multi-Hit Lookup
   - Multi-Database Lookup
   - Re-Issue Multi-Database Lookup
   - Simultaneous Multi-Database Lookup
■ Maintenance Features
   - Per entry aging support with notification
   - Multi Hit Invalidate
   - Learn per Database
■ Search with learn
   - Automatic learning
   - Duplicate learn prevention per database
■ Multiple return index formats
■ Flexible Associated Data Management
   - 0, 32, 64, or 128 bits of Associated Data per entry
■ Instruction Completion Notification
■ Multiple contexts per interface
■ Pool of 72-bit Global Mask Registers (shared across contexts)
■ Parity support for interfaces and CAM core
■ 35mm x 35mm thermally efficient 900 BGA Package