Primary and Secondary ENUM Configuration

For the purpose of redundancy, the Oracle Communications Unified Session Manager allows you to configure these number lookups to use a backup resource in case the lookup at the primary fails. Such scenarios include losing contact with the primary ENUM/LRT server config (query time-out) and the entry is not found at the primary (LRT or ENUM).

To apply primary and secondary number lookup resources to a sip-registrar:

1. From superuser mode, use the following command sequence to access the sip-registrar element and select the registrar you want to configure.

   ORACLE# configure terminal
   ORACLE(configure)# session-router
   ORACLE(session-router)# sip-registrar
   ORACLE(sip-registrar)# select

2. Specify the resources to use with the options command.

   Prepend the option with the + character if you have multiple options configured that you want to retain. Running the command without the + character causes the system to disable any previously configured options.

   To specify primary and secondary ENUM servers:

   ORACLE(sip-registrar)# options +e164-primary-config=enum:<enum-config name>
   ORACLE(sip-registrar)# options +e164-secondary-config=enum:<enum-config name>
   ORACLE(sip-registrar)# done

   To specify primary and secondary LRT resources:

   ORACLE(sip-registrar)# options +e164-primary-config=lrt:<lrt-config name>
   ORACLE(sip-registrar)# options +e164-secondary-config=lrt:<lrt-config name>
   ORACLE(sip-registrar)# done

   Bear in mind that an enum-config can reference multiple servers. When the Oracle Communications Unified Session Manager references an enum-config, queries follow the normal enum-config sequence, checking each referenced server in order. If the lookup is not successful at the primary, the Oracle Communications Unified Session Manager checks the servers in the registrar’s e164-secondary-config.

   In addition, each enum-config may refer to a different top-level-domain. This allows you to configure the Oracle Communications Unified Session Manager to successfully perform lookups within two domains.