Surveillance Vlan - TRENDnet TPE-3012LS User Manual

TRENDnet User's Guide

Surveillance VLAN

This chapter contains a description of the Switch's Surveillance VLAN feature and the
procedures to create, modify, and delete a surveillance VLAN configuration.
The Surveillance VLAN feature is specifically designed to maintain high quality,
uninterrupted IP camera/NVR video streaming traffic through the switch. When sending
video surveillance video traffic, IT may require no interruptions in the traffic and
excellent video quality for their surveillance network. The Surveillance VLAN feature can
be configured to meet these requirements.
CoS with Surveillance VLAN
The Surveillance VLAN CoS parameter maintains the voice quality between the ingress
and egress ports of the switch. CoS must be enabled for the Surveillance VLAN CoS
priority to take effect. The CoS priority level that you config is applied to video traffic on
all ports of the surveillance VLAN. Normally, most (non-video) Ethernet traffic
transverses the switch through lower-order egress queues. To avoid delays and
interruptions in the video traffic flow, the CoS priority level assigned to the surveillance
VLAN should be mapped to a higher-order queue and the scheduling algorithm should
be set to Strict Priority. These settings ensure that the video data packets are processed
before other types of data so that the voice quality is maintained as the video data
passes through the switch.
Organization Unique Identifier (OUI)
Each IP camera/NVR manufacturer can be identified by one or more Organization
Unique Identifiers (OUIs). An OUI is three bytes long and is usually expressed in
hexadecimal format. It is embedded into the first part of each MAC address of an
Ethernet network device. You can find the OUI of the IP camera in the first three
complete bytes of its MAC address.
Typically, you will find that all of the IP cameras you are installing have the same OUI in
common. The switch identifies a video data packet by comparing the OUI information in
the packet's source MAC address with an OUI table that you configure when you initially
set up the surveillance VLAN. This is important when the Auto-Detection feature for a
port and is a dynamic surveillance VLAN port.
When you are configuring the surveillance VLAN parameters, you must enter the
complete MAC address of at least one of your IP cameras. An "OUI Mask" is
automatically generated and applied by the Web Management Utility software to yield
the manufacturer's OUI. If the OUI of the remaining phones from that manufacturer is
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the same, then no other IP camera MAC addresses need to be entered into the
configuration.
It is possible to find more than one OUI from the same manufacturer among the IP
cameras you are installing. It is also possible that your IP cameras are from two or more
different manufacturers in which case you will find different OUIs for each
manufacturer. If you identify more than one OUI among the IP cameras being installed,
then one MAC address representing each OUI must be configured in the surveillance
VLAN.
Dynamic Auto-Detection vs Manual Ports
Prior to configuring the voice VLAN, you must configure a tagged VLAN which is the
basis for the surveillance VLAN configuration. The VLAN must be configured with one or
more tagged or untagged ports that will serve as the surveillance VLAN uplink/downlink.
By default, a tagged or untagged port is a static member of a tagged VLAN. The ports
that you choose to configure as dynamic Auto-Detection ports must be connected
directly to an IP camera. When you initially define the ports of a tagged VLAN for your
surveillance VLAN configuration, they must be configured as a "Not Member" ports. The
"Not Member" ports are eligible to dynamically join the surveillance VLAN when video
data is detected with a predefined OUI in the source MAC address. The port will leave
the surveillance VLAN after a specified timeout period. This port behavior is configured
with the surveillance VLAN Auto-Detection feature.
For the Auto-Detection feature to function, your IP camera(s) must be capable of
generating 802.1Q packets with embedded VLAN ID tags. You must manually configure
your IP camera(s) for the same VLAN ID as the switch's voice VLAN ID. When video data
is detected on one of the "Not Member" ports, the packets from the IP camera will
contain the surveillance VLAN ID so they are switched within the switch's surveillance
VLAN.
One or more ports in your surveillance VLAN must be configured as Static tagged or
untagged members. Static VLAN members are permanent member ports of the
surveillance VLAN and there is no dependency on the configuration of the devices
connected to the ports. These ports might be connected to other surveillance VLAN
network nodes such as other Ethernet switches or a DHCP server. The surveillance VLAN
Auto-Detection feature cannot be enabled on Static tagged or tagged ports.
Note: Any Static tagged members of the voice VLAN are required to have the port VLAN
ID (PVID) configured to be the same as the voice VLAN ID. This ensures that all untagged
packets entering the port are switched within the voice VLAN as the voice data passes
through the switch.
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