Configuring SIP Interface with reg-via-key and reg-via-match

If you do not want the use the call scenario associated with the SIP interface options in the New Behavior section, you do not need to make any change to your configuration.

If you want your call scenarios to resemble the one associated with the SIP interface options in the New Behavior section, then you need to configure reg-via-key and reg-via-match options on the SIP interface facing the UE.

To configure a SIP interface with the reg-via-key and reg-via-match options:

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-interface and press Enter.
```
ORACLE(session-router)# sip-config
ORACLE(sip-interface)#
```
If you are adding support for this feature to a pre-existing configuration, then you must select (using the ACLI select command) the configuration that you want to edit.
options—Set the options parameter by typing options, a Space, and then the option name. Then press Enter.
```
ORACLE(sip-interface)# options +reg-via-key
ORACLE(sip-interface)# options +reg-via-match
```
If you type the option without the plus sign, you will overwrite any previously configured options. In order to append the new options to this configuration’s options list, you must prepend the new option with a plus sign as shown in the previous example.
Save your work.