D-Link DGS-1250 User Manual - Page 90
L2 Features > VLAN > Auto Surveillance VLAN > Auto Surveillance, ONVIF Discover Port
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DGS-1250 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide To view the following window, click L2 Features > VLAN > Auto Surveillance VLAN > Auto Surveillance Properties, as shown below: Figure 5-21 Auto Surveillance Properties Window The fields that can be configured in Global Settings are described below: Parameter Surveillance VLAN State Surveillance VLAN ID Surveillance VLAN CoS Aging Time ONVIF Discover Port Description Select to enable or disable the surveillance VLAN feature here. Enter the VLAN ID of the surveillance VLAN here. The range is from 2 to 4094. A normal VLAN needs to be created before assigning the VLAN as a surveillance VLAN. Enter the Class of Service (CoS) value for the surveillance VLAN here. The surveillance packets arriving at the surveillance VLAN enabled port are marked with the CoS specified here. The remarking of CoS allows the surveillance VLAN traffic to be distinguished from data traffic in quality of service. The range is from 0 to 7. Enter the aging time value here. This is used to configure the aging time for aging out the surveillance VLAN dynamic member ports. The range is from 1 to 65535 minutes. When the last surveillance device connected to the port stops sending traffic and the MAC address of this surveillance device is aged out, the surveillance VLAN aging timer will be started. The port will be removed from the surveillance VLAN after expiration of surveillance VLAN aging timer. If the surveillance traffic resumes during the aging time, the aging timer will be cancelled. Enter the TCP/UDP port number here. The range is either 554, or from 1025 to 65535. This is used to configure the TCP/UDP port number for RTSP stream snooping. ONVIF-capable IPC and ONVIF-capable NVR utilize WS-Discovery to find other devices. Once IPCs are discovered, the Switch can further discover NVRs by snooping RTSP, HTTP, and HTTPS packets between NVRs and IPCs. These packets cannot be snooped if the TCP/UDP port is not equal to the RTSP port number. Click the Apply button to accept the changes made. 81