SIP user registration not shown on SBC
Currently while registering Avaya SIP endpoints with SBC-3820 I am seeing the problem that after registration "show registration sipd by-user <user>" is showing "No matching entries found!". The SIP clients are not behind NAT. Registration and subscription is successful is on Avaya session manager within the enterprise.
After that if we initiate a two party call then SBC is not able to route the INVITE to the fard end party. What could be the reason for no registrations information on SBC?