Cisco 2600 Series Operation Manual page 137

Connecting Compression
Network Modules to a Network
Compression network modules are supported in Cisco 3600 series routers only.
Note
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.
Connecting Compression Network Modules to a Network 14-1
C H A P T E R 1 4