After the VCN3000 platform (with the version V100R002C20SPC212) is connected to the NetPosa platform through GB/T 28181+ protocol as the lower-level domain, videos recorded by cameras on the VCN3000 platform cannot be queried on the NetPosa platform.
1. Register with the cameras on the VCN3000 platform and request live recording. If live recording can be performed, the communication between the VCN3000 platform and NetPosa platform is normal.
2. Run tcpdump on the VCN3000 platform to capture packets. During packet capturing, query recorded video and export the PCG logs.
3. The obtained capture file shows that the VCN3000 platform returns an ERROR message after receiving the video query messages sent from the NetPosa platform.