KTI Networks KGS-0841-W User Manual page 39

User Priority: 3-bit field refer to the 802.1p priority
CFI: The Canonical Format Indicator for the MAC address is a 1 bit field.
VID: VLAN identifier, 12-bit field identifies the VLAN to which the frame belongs to.
Untagged packet: A standard Ethernet frame with no VLAN Tag field
Priority-tagged packet: An IEEE 802.1Q packet which VID filed value is zero (VID=0)
VLAN-Tagged packet: An IEEE 802.1Q packet which VID filed value is not zero (VID<>0)
PVID (Port VID): PVID is the default VID of an ingress port. It is often used in VLAN classification for
untagged packets. It is also often used for egress tagging operation.
DSCP: Differentiated Service Code Point, 6-bit value field in an IP packet
VLAN Table lookup: The process of searching VLAN table to find a VLAN which matches the given VID index
MAC address table lookup: The process of searching MAC address table to find a MAC entry which matches
the given destination MAC address and the port where the MAC address is located
Packet forwarding: also known as packet switching in a network switch based on MAC address table and VLAN
table information
VLAN forwarding: the operation that a packet is forwarded to an egress destination port based on VLAN table
information
VLAN group: configuration information about a VLAN which can be recognized in the switch. The information
includes a VID associated to the VLAN, member ports, and some special settings.
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