Interlogix GE-DS-242-PoE User Manual
Page 67
Chapter 4: Console Management
GE-DS-242-PoE Managed Ethernet Switch User Manual
63
You can create and delete Tag-based VLAN. There are 256 VLAN groups to
provide configure. Enable 802.1Q VLAN, the all ports on the switch belong to
default VLAN, VID is 1. The default VLAN can't be deleted.
Understanding the 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.
Frame Income
Frame Leave
Income Frame is tagged
Income Frame is untagged
Leave port is tagged
Frame remains tagged
Tag is inserted
Leave port is
untagged
Tag is removed
Frame remain untagged
VLAN Group Configuration
VLAN Group Configuration