Amer Networks SS3GR24i - Manual (Page 36)

SS3GR24i/SS3GR48i Layer3 Stackable Gigabit Switch User’s Guide
Figure 4- 2. IEEE 802.1Q Tag
The EtherType and VLAN ID are inserted after the MAC source
address, but before the original EtherType/Length or Logical Link
Control. Because the packet is now a bit longer than it was
originally, the Cyclic Redundancy Check (CRC) must be
recalculated.
Figure 4- 3. Adding an IEEE 802.1Q Tag
30