Editing VLAN (section)

===IEEE 802.1Q===
{{Main|IEEE 802.1Q}}
Under IEEE 802.1Q, the maximum number of VLANs on a given Ethernet network is 4,094 (4,096 values provided by the 12-bit {{abbr|VID|VLAN identifier}} field minus reserved values at each end of the range, 0 and 4,095).  This does not impose the same limit on the number of IP subnets in such a network since a single VLAN can contain multiple IP subnets. [[IEEE 802.1ad]] extends the number of VLANs supported by adding support for multiple, nested VLAN tags. [[IEEE 802.1aq]] (Shortest Path Bridging) expands the VLAN limit to 16 million. Both improvements have been incorporated into the IEEE 802.1Q standard.