Cisco Unified CallManager System Guide, Release 5.0(2)
Autoregistration
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Autoregistration

Table Of Contents

Autoregistration

Understanding Autoregistration

Autoregistration with Multiple Protocol Support

Autoregistration Configuration Checklist

Where to Find More Information


Autoregistration


Autoregistration automatically assigns directory numbers to new devices as they connect to the IP telephony network. This section covers the following topics:

Understanding Autoregistration

Autoregistration Configuration Checklist

Autoregistration with Multiple Protocol Support

Where to Find More Information

Understanding Autoregistration

Use autoregistration if you want Cisco Unified CallManager automatically to assign directory numbers to new phones when you plug these phones in to your network. Cisco recommends you use autoregistration to add less than 100 phones to your network.

Cisco Unified CallManager disables autoregistration by default to prevent unauthorized connections to your network. Do not enable autoregistration unless you know what your dial plan looks like, including calling search spaces and partitions.


Caution Enabling autoregistration carries a security risk in that "rogue" phones can automatically register with Cisco Unified CallManager. You should enable autoregistration only for brief periods when you want to perform bulk phone adds.

Configuring mixed-mode, clusterwide security through the Cisco CTL client automatically disables autoregistration. If you want to use autoregistration and you have configured security, you must change the clusterwide security mode to nonsecure through the Cisco CTL client.

Another strategy for preventing unauthorized phones from connecting to your network entails creating a Rogue device pool that allows only 911 (emergency) and 0 (operator) calls. This device pool allows phones to register but limits them to emergency and operator calls. This device pool prevents unauthorized access to phones that continuously boot in an attempt to register in your network.

When you enable autoregistration, you specify a range of directory numbers that Cisco Unified CallManager can assign to new phones as they connect to your network. As new phones connect to the network, Cisco Unified CallManager assigns the next available directory number in the specified range. After a directory number is assigned to an autoregistered phone, you can move the phone to a new location, and its directory number remains the same. If all the autoregistration directory numbers are consumed, no additional phones can autoregister with Cisco Unified CallManager.

The Cisco Unified CallManager Group that has the Auto-registration Cisco Unified CallManager Group check box checked, specifies the list of Cisco Unified CallManagers that the phone will use to attempt to auto register. At least one Cisco Unified CallManager must be selected in the group. The first Cisco Unified CallManager in the selected list must also have the Auto-registration Disabled on this Cisco Unified CallManager check box unchecked in the Cisco Unified CallManager Configuration window. This ensures that the Cisco Unified CallManager allows the autoregistration request from the phone.

New phones auto-register with the primary Cisco Unified CallManager in the Cisco Unified CallManager group that has enabled the Auto-Registration Cisco Unified CallManager Group setting. That Cisco Unified CallManager automatically assigns each auto-registered phone to a default device pool based on the device type (refer to the "Device Defaults Configuration" chapter in the Cisco Unified CallManager Administration Guide). After a phone auto-registers, you can update its configuration and assign it to a different device pool and a different Cisco Unified CallManager (see the "Device Pools" section on page 5-10).

Autoregistration with Multiple Protocol Support

Autoregistration means that unknown phones will be coming into the network. Because the phones are unknown, Cisco Unified CallManager does not know whether the new phones should be registered as SIP phones or as SCCP phones. Therefore, the system administrator uses Cisco Unified CallManager Administration to specify the default protocol that new phones should use for autoregistration.

Cisco devices that support both SIP and SCCP protocols (Cisco Unified IP Phone models 7905, 7911, 7912, 7940, 7941, 7960, 7961, 7970, and 7971) will auto register with the protocol that is specified in the Auto Registration Phone Protocol Enterprise Parameter. Cisco devices that only support a single protocol will auto register with that protocol regardless of the Auto Registration Phone Protocol setting. For example, the Cisco Unified IP Phone 7902 only supports SCCP. If a Cisco Unified IP Phone 7902 auto registers, it will use the SCCP protocol regardless of whether the Auto Registration Phone Protocol is set to SIP.


Note To ensure that autoregistration works correctly, the Device Defaults Configuration window must have the correct phone image names specified for SIP and SCCP protocols.


To deploy phones in a mixed-protocol environment, you must perform additional steps when autoregistering a new mixed batch of phones. The first step requires that the administrator set the Cisco Unified CallManager Auto Registration Phone Protocol parameter in the Enterprise Parameters Configuration window to SCCP and install all the SCCP phones. The second step requires that the administrator change the Auto Registration Phone Protocol parameter to SIP and autoregister all the SIP phones.

Autoregistration Configuration Checklist

Table 12-1 lists general steps and guidelines for using autoregistration.

Table 12-1 Autoregistration Configuration Checklist 

Configuration Steps
Procedures and related topics

Step 1 

In the Enterprise Parameters Configuration window, set the Auto Registration Phone Protocol to SIP or SCCP. SCCP acts as the default, so change this setting when auto registering SIP phones.

Enterprise Parameters Configuration, Cisco Unified CallManager Administration Guide

Step 2 

Configure only one Cisco Unified CallManager in the cluster to use for autoregistration.

Always enable or disable autoregistration on this Cisco Unified CallManager only. If you want to shift the autoregistration function to another Cisco Unified CallManager in the cluster, you must reconfigure the appropriate Cisco Unified CallManagers, the Default Cisco Unified CallManager Group, and, possibly, the default device pools.

Cisco Unified CallManager Configuration, Cisco Unified CallManager Administration Guide

Step 3 

Configure the Default Cisco Unified CallManager Group, or another Cisco Unified CallManager Group, as the autoregistration group. Choose the autoregistration Cisco Unified CallManager from Step 1 as the primary Cisco Unified CallManager in this group.

Cisco Unified CallManager Groups, page 5-3

Cisco Unified CallManager Group Configuration, Cisco Unified CallManager Administration Guide

Step 4 

Configure a calling search space specifically for auto-registration. For example, you can use the auto-registration calling search space to limit auto-registered phones to internal calls only.

Partitions and Calling Search Spaces, page 15-1

Calling Search Space Configuration, Cisco Unified CallManager Administration Guide

Step 5 

Configure the Default device pool for autoregistration by assigning the Default Cisco Unified CallManager Group and autoregistration calling search space to it. If you are configuring a separate default device pool for each device type, assign the default device pools to the device by using the Device Defaults Configuration window.

System-Level Configuration Settings, page 5-1.

Device Pool Configuration, Cisco Unified CallManager Administration Guide

Device Defaults Configuration, Cisco Unified CallManager Administration Guide

Step 6 

Enable auto-registration only during brief periods when you want to install and autoregister new devices (preferably when overall system usage is at a minimum). During other periods, turn auto-registration off to prevent unauthorized devices from registering with Cisco Unified CallManager.

Enabling Autoregistration, Cisco Unified CallManager Administration Guide

Disabling Autoregistration, Cisco Unified CallManager Administration Guide

Step 7 

Install the devices that you want to autoregister.

Refer to the installation instructions that come with your IP phones and gateways.

Step 8 

Reconfigure the autoregistered devices and assign them to their permanent device pools.

Cisco Unified IP Phone Configuration, Cisco Unified CallManager Administration Guide

Gateway Configuration, Cisco Unified CallManager Administration Guide

Step 9 

In the Enterprise Parameters Configuration window, set the Auto Registration Phone Protocol setting to SIP or SCCP, whichever is needed. If auto registering more phones with a different protocol is required, repeat the preceding steps.

Enterprise Parameters Configuration, Cisco Unified CallManager Administration Guide

Where to Find More Information

Related Topics

System-Level Configuration Settings, page 5-1

Redundancy, page 7-1

SIP Line Side Overview, page 41-15

Cisco Unified CallManager Configuration, Cisco Unified CallManager Administration Guide

Cisco Unified CallManager Group Configuration, Cisco Unified CallManager Administration Guide

Device Pool Configuration, Cisco Unified CallManager Administration Guide

Enterprise Parameters Configuration, Cisco Unified CallManager Administration Guide