C
HAPTER
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| VLAN Stacking
VLAN Stacking Settings
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Figure 17: VLAN Stacking Table
VLAN STACKING SETTINGS
After configuring port members for stacking VLANs on the switch, the ports
connected to a service provider network need to be enabled as doubled-
tagged ports. Also the Tag Protocol Identifier (TPID) value must be set for
the doubled-tagged ports to identify 802.1Q tagged frames.
PARAMETERS
◆ PVID – The stacking VLAN Port VLAN Identifier. The PVID determines
the stacking VLAN tag for single-tagged packets forwarded to an
enabled S-VLAN port.
◆ Provider Network Port – Set the S-VLAN membership mode for the
selected interface. This mode is used to segregate and preserve
customer VLAN IDs for traffic crossing the service provider network.
(Default: Disable)
■
Enable – Indicates a port linked to a service provider (an 802.1Q
Tunnel port).
■
Disable – Indicates a port linked to a customer.
◆ Tag Protocol ID – Tag Protocol Identifier specifies the ethertype of
incoming packets on a tunnel port. (Range: 0x0600~0xFFFF
hexadecimal; Default: 0x88a8)
Use the TPID field to set a custom 802.1Q ethertype value on the
selected interface. This feature allows the switch to interoperate with
third-party switches that do not use the standard 0x8100 ethertype to
identify 802.1Q-tagged frames. For example, 0x1234 is set as the
custom 802.1Q ethertype on a trunk port, incoming frames containing
that ethertype are assigned to the VLAN contained in the tag following
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