Cisco 3825 Hardware Installation Guide - Page 203

14 C H A P T E R Connecting Compression Network Modules This chapter describes the compression network module for Cisco 3600 series routers and contains the following sections: • Compression Network Modules, page 14-1 • Interfaces Supported, page 14-2 • Compression Network Module LEDs, page 14-2 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. Tip To determine whether your router supports a specific network module, see Table 1-6 on page 1-16. Compression Network Modules The compression network module (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 and later releases allow Frame Relay compression support using the FRF.9 compression algorithm. Figure 14-1 Compression Network Module COMPRESSION EN ERROR ACTIVE H10480 OL-2485-20 Cisco Network Modules Hardware Installation Guide 14-1