Cisco 3600 Series

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CHAPTER

Connecting Compression Network Modules to a Network 14-1

Connecting Compression

Network Modules to a Network

Note Compression network modules are supported in Cisco 3600 series routers only.

This chapter describes the compression network module for Cisco modular routers, and

contains the following sections:

• Compression Network Module on page 14-1

• Supported Interfaces on page 14-2

• Compression Network Module LEDs on page 14-3

This module provides hardware assistance to protocols that use compression and

decompression, reduces the load on the CPU caused by software compression, and

improves router performance.

Compression Network Module

The compression network module (Cisco product number NM-COMPR) does not provide

network interfaces of its own, but instead compresses and decompresses data passing

through interfaces on other network modules or WAN interface cards in the router. (See

Figure 14-1.)

Hardware compression is supported only over Point-to-Point Protocol (PPP) links. The

compression network module supports only the Stacker compression algorithm.

Cisco IOS Release 11.3 allows Frame Relay compression support using the FRF.9

compression algorithm.

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Cisco 3600 Series - Page 137