D-Link DGS-1250 Series Reference Manual page 89

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:
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
Click the Apply button to accept the changes made.
Figure 5-21 Auto Surveillance Properties Window
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.
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