VLAN . :
1. , VLAN 802.1Q- ( , Trunk Link);
2. VLAN IEEE 802.1Q , IEEE 802.1Q;
3. , , , - ;
4. , L3. , , VLAN, . , , , IEEE 802.1Q.
IEEE 802.1Q
Tagging (" ") 802.1Q VLAN .
Untagging (" ") 802.1Q VLAN .
VLAN ID (VID) VLAN.
Port VLAN ID (PVID) VLAN.
Ingress port (" ") , , VLAN.
Egress port (" ") , , , , , .
tagged () untagged (). untagging , Ethernet. tagging VLAN , IEEE 802.1Q.
VLAN
VLAN IEEE 802.1Q
IEEE 802.1Q Ethernet, VLAN . . 6.7 802.1Q VLAN. Ethernet 32 (4 ), 1522 . 2 ( Tag Protocol Identifier, TPID) 08100 , 802.1Q. 2 :
Priority ("") 3 ( 0 7, 7 ), 802.1;
Canonical Format Indicator (CFI) 1 (Token Ring, FDDI), Ethernet;
VID (VLAN ID) 12- VLAN , VLAN . VID 12 , 4094 VLAN (VID 0 VID 4095 ).
Ethernet