Exceptions to the VLAN forwarding rules

Last Updated : Apr 17, 2026 |
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Exceptions to the VLAN forwarding rules are as follows:
  • LLDP frames are always exchanged between the following in all VLAN separation modes:
    • The LAN port and CPU port
    • The CPU port and LAN port
  • Spanning tree frames are always exchanged between the LAN port and PC port in all VLAN separation modes.
  • 802.1x frames are always exchanged between the following in all VLAN separation modes according to DOT1XSTAT and DOT1X configuration:
    • The LAN and CPU port or PC port
    • The PC and CPU port or LAN port
    • The CPU port and LAN port
Related information
Virtual LAN (VLAN)