Multi-switch VLAN Operations
Inter-switch protocols
- Must be able to identify the VLAN to which the packet belongs
Use IEEE 802.1q (an emerging standard)
- When a packet needs to go from one switch to another
- 16-byte VLAN tag inserted into the 802.3 packet by the sending switch
- When the IEEE 802.1q packet reaches its destination switch
- Its header (VLAN tag) stripped off and Ethernet packet inside is sent to its destination computer