Guest

Data Compression

Using the show compress Command with the Hardware Compression Module

Document ID: 9345



Contents

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
The show compress Command
      Field Definitions
Related Information

Introduction

This document explains how to interpret the output displayed by the show compress command when hardware compression is enabled (that is, when you implement compression in the Compression Service Adapter [CSA] hardware).

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on these software and hardware versions:

Platform

Recommended Minimum Cisco IOS® Software Release

Cisco 7000 and 7500 series with VIP2-40 (=)

Cisco IOS Software Release 11.1(6)CA or a later release of Cisco IOS Software Release 11.1CA

Cisco 7000 and 7500 series with VIP2-50 (=)

Cisco IOS Software Release 11.1(14)CA or a later release of Cisco IOS Software Release 11.1CA

Cisco 7204 and Cisco 7206 routers

Cisco IOS Software Release 11.1(6)CA or a later release of Cisco IOS Software Release 11.1CA

For multiple CSA support in Cisco 7204 or Cisco 7206 routers

Cisco IOS Software Release 11.1(8)CA1 or later

AIM-COMPR2: Cisco 2600 series routers

Cisco IOS Software Release 12.0(1)T or later

NM-COMPR: Cisco 3620 and 3640 series routers

Cisco IOS Software Release 11.2(7a)P or later

AIM-COMPR4: Cisco 3660 series routers

Cisco IOS Software Release 12.0(5)T or later

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

Refer to Cisco Technical Tips Conventions for more information on document conventions.

The show compress Command

In order to see what the show compress command does, view this sample output:

Router#show compress
Serial6/1 
Hardware compression enabled 
CSA in slot3 in use 
Compressed bytes sent: 402 bytes 0 Kbits/sec ratio: 4.092 
Compressed bytes recv: 390 bytes 0 Kbits/sec ratio: 3.476 
restarts:1 
last clearing of counters: 1278 seconds 

Field Definitions

The information displayed here by the show compress command is the same for both hardware and distributed compression. For Cisco 7200 Series Routers with multiple CSAs, an additional line is displayed to indicate the CSA currently in use.

Field

Description

Serial6/1

Name and number of the interface

Hardware compression enabled

Type of compression

CSA in slot3 in use

Identifies the CSA that performs a compression service.

Compressed bytes sent

Total number of compressed bytes sent including the kilobits per second

Compressed bytes recv

Total number of compressed bytes received including the kilobits per second

ratio

Compression ratio for bytes sent and received since the link last came up or since the counters were last cleared.

restarts

Number of times the compression process restarted or reset

last clearing of counters

Duration since the last time the counters were cleared with the clear counters command.


Related Information



Updated: Sep 18, 2006 Document ID: 9345