This post describes the possible causes of a camera that is online but cannot be detected online by the VCN.
【Problem Description】:
The IVS client can't view the camera image.
The FSE feedbacks that it is ok at the A base station, but an abnormality occurs at the B base station.
The camera is Yaan.
Networking: IP cameras are transmitted from Huawei eLTE to the core network and then to the IVS VCN3000.
When the IP camera is online, the camera list on the VCN3000 is gray, and the camera cannot be detected online. However, the VCN3000 server that logs in to through PuTTY can ping the camera. The backhaul link is normal.
【Problem Analysis】：
1. We capture the network on the VCN server-side, we find that the server sent the packet and the camera did not respond.
2. We capture the network on the camera side, and we find that the length of the packet transmitted by the camera is 1500. However, the wireless device MTU limits the length to 1300.
【Root Cause】：
The length of the packet transmitted by the camera is 1500. However, the wireless device MTU limits the length to 1300. So the packet can't reach the VCN server.
【Solution Description】：
The FSE contacted the camera manufacturer, and the camera manufacturer changed the length of the package to less than 1300.
After the package length had been changed, the image can be viewed on the IVS client.
