Configuring the Retry-After Header Calculation

1. Access the sip-config configuration element.

   ORACLE# configure terminal
   ORACLE(configure)# session-router
   ORACLE(session-router)# sip-config
   ORACLE(sip-config)# 
   

2. Do one of the following:
   • Set the retry-after-enhancement parameter to enabled:

     ORACLE(sip-config) #retry-after-enhancement enabled

   • Set the retry-after-enhancement parameter to disabled:

     ORACLE(sip-config)# retry-after-enhancement disabled

     This is the default setting.
3. Set the reject-interval and syscpu-reject-interval options according to your needs, and considering whether retry-after-enhancement is enabled.
   For example, to achieve a Retry-After value of around 900 seconds when the rejection rate is 100%:

   • If retry-after-enhancement is enabled, set reject-interval to 7. The SBC will randomly select a different Retry-After value between 724 and 962 seconds for each message.

     ORACLE(sip-config)# options +reject-interval=7

   • If retry-after-enhancement is disabled, set reject-interval to 90. The Retry-After value will be 900 seconds for all messages.

     ORACLE(sip-config)# options +reject-interval=90

4. Save and activate your changes. You do not need to reboot the SBC.