Specifications

Cisco Unified SIP SRST 4.0 System Administrator Guide

Configuring the SIP Registrar

Note Prior to version 4.0, the name of this product was Cisco SIP SRST.

Session Initiation Protocol (SIP) registrar functionality in Cisco IOS software is an essential part of

Cisco Unified SIP Survivable Remote Site Telephony (SRST). According to RFC 2543, a SIP registrar

is a server that accepts Register requests and is typically collocated with a proxy or redirect server. A

SIP registrar may also offer location services.

Note The Cisco IOS Voice Configuration Library includes a standard library preface, glossary, and feature and

troubleshooting documents and is located at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vcl.htm.

Contents

This section contains the following procedures:

• Prerequisites for Configuring the SIP Registrar, page 23

• Restrictions for Configuring the SIP Registrar, page 23

• Information About Configuring the SIP Registrar, page 24

• How to Configure the SIP Registrar, page 24

Prerequisites for Configuring the SIP Registrar

Complete the prerequisites documented in the “Prerequisites for Configuring Cisco Unified SIP SRST”

section in the “Cisco Unified SIP SRST Feature Overview” chapter.

Restrictions for Configuring the SIP Registrar

See the restrictions documented in the “Restrictions for Configuring Cisco Unified SIP SRST” section

in the “Cisco Unified SIP SRST Feature Overview” chapter.