Interlogix GE-DSSG-244-POE User Manual - Manual (Page 97)

IFS NS3601-24P/4S GE-DSSG-244 and 244-POE User Manual
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Figure 4-6-1 VLAN Basic Information page screenshot
The page includes the following fields:
Object Description
• Mode Display the current VLAN mode used by this Managed Switch
„
Port-Based
„ IEEE 802.1Q VLAN
• Maximum VLAN ID Maximum VLAN ID recognized by this Managed Switch.
• Maximum Number of
Supported VLANs
Maximum number of VLANs that can be configured on this Managed Switch.
• Current number of
VLANs
Display the current number of VLANs
• VLAN Learning Display the VLAN learning mode. The Managed Switch supports IVL (IVL
Independent vlan learning).
• Configurable PVID
Tagging
Indicates whether or not configurable PVID tagging is implemented.
VLAN Port Configuration
This page is used for configuring the Managed Switch port VLAN. The VLAN per Port Configuration page contains fields for
managing ports that are part of a VLAN. The port default VLAN ID (PVID) is configured on the VLAN Port Configuration page. All
untagged packets arriving to the device are tagged by the ports PVID.
Understand nomenclature of the Switch
■ IEEE 802.1Q Tagged and Untagged
Every port on an 802.1Q compliant switch can be configured as tagged or untagged.
• Tagged: Ports with tagging enabled will put the VID number, priority and other VLAN information into the
header of all packets that flow into those ports. If a packet has previously been tagged, the port
will not alter the packet, thus keeping the VLAN information intact. The VLAN information in the
tag can then be used by other 802.1Q compliant devices on the network to make
packet-forwarding decisions.
• Untagged: Ports with untagging enabled will strip the 802.1Q tag from all packets that flow into those
ports. If the packet doesn't have an 802.1Q VLAN tag, the port will not alter the packet. Thus,
all packets received by and forwarded by an untagging port will have no 802.1Q VLAN
information. (Remember that the PVID is only used internally within the Switch). Untagging is
used to send packets from an 802.1Q-compliant network device to a non-compliant network
device.