Tag-Based (Ieee802.1Q) Vlan - Fujitsu XG0224 User Manual

XG Series User's Guide
4.6.2

Tag-Based (IEEE802.1Q) VLAN

Tag-based VLAN is a method of configuring VLANs so that the frame forwarding decision is based on a tag in the MAC
header identifying the VLAN membership. 4 bytes of additional data in the header, called a VLAN tag, identifies the
VLAN frame ownership. Using a VLAN tag enables configuring a single physical link that shares multiple VLANs.
The device's tag-based VLAN function is based on the IEEE 802.1Q standard.
The following figure shows an Ethernet frame format including a VLAN tag as specified by the IEEE 802.1Q standard.
DA
(6 )
TPID (Tag Protocol Identifier) (0x8100)
TCI (Tag Control Information)
User Priority(3bit): Priority of Frames (Higher priority to larger number from 0 to 7)
CFI (Canonical Format Indicator)(1bit): "1" when RIF field exists. Normally "0".
VLAN ID(12bit):VLAN identifier (0 to 4095. 0 and 4095 are reserved ID)
To configure a tag-based VLAN, carry out the following procedures in "admin" Operation mode.
XG2600# configure
XG2600(config)# ether 1-8 vlan tag 100-300
XG2600(config)# commit
XG2600(config)# save
XG2600(config)# exit
SA
VLAN tag
(6)
(4)
2 bytes 2 bytes
TPID TPID
0x8100 0x8100
User
CFI
Priority
3 bit
1 bit
Tag VLAN Frame Format
Command
TYPE
TYPE
Protocol data (IP Packet, etc.)/
Protocol data (IP Packet, etc.)/
LENGTH
LENGTH
(2)
(2)
2 bytes 2 bytes
TCI TCI
VLAN ID
12 bit
Switch to Configuration mode.
Set the tag-based VLAN ID 100-300 for port 1-8.
Apply the configuration.
Save the configuration.
Switch to Operation mode.
75
Chapter 4 Switch Functions and their Configuration
LLC,SNAP
LLC,SNAP
Task
VLAN