[Problem Description]: Multipoint Conference problem using PAD
[Problem Analysis]: Checking the SMC, the TP client GK registration is unsuccessful, and the pinging of the SMC client from the TP client is unsuccessful. It is recommended to check the network.
[Root Cause]: The network is unreachable, causing the conference to fail from the PAD.
[Solution Description]: change a VLAN, who is the agent of the customer , checked the config of LANSWITCH corrected it