1. Registration problem in SIP TLS scenario
To obtain the signaling diagnosis, you must capture the terminal registration process together (there is a certificate interaction process for unpacking), and then follow the document http://3ms.huawei.com/km/blogs/edit/2501571 to unpack and follow Analysis in UDP scenario
2. Registration problem in SIP UDP scenario
If the SIP registration fails, it is generally reported by the packet whether the SC has received the registration, whether there is a response, whether the terminal has received the response, and the registration failure response error code.
First, according to the protocol sip filtering, if you know the address of the terminal, you can filter it with the address, and then see the basic registration process after filtering. Generally, for the authentication registration, after receiving the REGISTER of the terminal, the 401 representative needs the terminal to carry the authentication information for registration, and then the terminal sends the REGISTER again, and the SC replies 200 OK to indicate that the registration is successful.
Registration can also be filtered based on the CallID carried in the REGISTER to filter out irrelevant signaling.
Registered REGISTER signaling focuses on the following points
