SIP Registration Cache Limiting Configuration

This section shows you how to configure the registration cache limit, and how to set the options controlling retry times and thresholds for alarm purposes.

To configure SIP registration cache limiting:

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

Type session-router and press Enter.

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

Type sip-config and press Enter.
```
ORACLE(session-router)# sip-config
ORACLE(sip-config)#
```
If you are adding this feature to an existing configuration, you need to select the configuration (using the ACLI select command) before making your changes.
registration-cache-limit—Set the registration cache limit, or the maximum number of SIP registrations that you want to keep in the registration cache. The minimum and default value for this parameter is 0, and you can set it to a maximum value of 999999999. Leaving this parameter set to 0 means there is no limit on the registration cache (and therefore leaves this feature disabled).
options—Set the options parameter by typing options, a Space, the option name reg-cache-lim-retry-after=X (where X is the value added to the Retry-After header) with a plus sign in front of it. This option defaults to 1800, and you can enter values from 0 to 999999999.
You can configure the alarm threshold option the same way, substituting the option name reg-cache-alarm-thresh=X (where X is the percentage of registration cache limit that triggers an alarm). This option defaults to 95, and you can enter value from 0 to 100.
```
ORACLE(sip-config)# options +reg-cache-lim-retry-after=2500
ORACLE(sip-config)# options +reg-cache-alarm-thresh=90
```
If you type options and then the option value for either of these entries 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 and activate your configuration.