X.25 Protocols

Document ID: 14215

Contents

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
Sample Output
Possible Values
Related Information

Introduction

To display information about active switched virtual circuits (SVCs) and permanent virtual circuits (PVCs), use the show x25 vc EXEC command. From the information displayed when we use this command, we can view the state of the virtual circuit. This document looks at the possible values that can be alllocated to the virtual circuit state, and their definitions.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

Conventions

For more information on document conventions, refer to the Cisco Technical Tips Conventions.

Sample Output

Let's look at some sample output from the show x25 vc command:

Router# show x25 vc 9999 
SVC 9999, State: D1, Interface: Serial0
  Started 0:00:31, last input 0:00:31, output 0:00:31 

Possible Values

D1 is the normal ready state. Let's look at other possible states for the virtual circuit in the following table:

See Annex B of the 1984 ITU-T X.25 Recommendation for more information on these states.

Related Information

• X.25 and LAPB Commands
• Technical Support - Cisco Systems