SIP REGISTER Forwarding Configuration

To configure SIP REGISTER forwarding after a Call-ID change:

In Superuser mode, type configure terminal and press Enter.
```
ORACLE# configure terminal
```

Type session-router and press Enter.

ORACLE(configure)# session-router
ORACLE(session-router)#

Type sip-config and press Enter. The system prompt changes to let you know that you can begin configuring individual parameters.
```
ORACLE(session-router)# sip-config
ORACLE(sip-config)#
```
options—Add this feature to a new or an existing SIP configuration:
If you do not currently have a SIP configuration, you can add the option by typing options, a Space, and then forward-reg-callid-change.
```
ORACLE(sip-config)# options forward-reg-callid-change
```
For an existing SIP configuration, select the SIP configuration so that you can add this feature to it. Then, to add this option to a list of options that you have already configured, type options, a Space, the plus sign (+), and the forward-reg-callid-change option.
```
ORACLE(sip-config)# options +forward-reg-callid-change
```
If you type options forward-reg-callid-change without the plus (+) sign, you will remove any previously configured options. In order to append the new option to the options list, you must prepend the new option with a plus sign as shown in the example above.
Save and activate your changes.