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Mixed VLAN on the same port
Combination of VLAN used by the same port is shown below.
VLAN type
Port VLAN（untagged）
Protocol VLAN（untagged）
Tag VLAN（Tagged）
VLAN judgment at the time of receiving packets
When packets are received by the port set by VLAN, execute the judgment for received packets belonging to
VLAN by the following sequence.
Packet receive
Is it tagged packets?
Is it matches the protocol
VLAN definition?
Is there a port VLAN
definition?
No
Is it BPDU packets?
No
Discard
) In this device, Tag VLAN/Protocol VLAN are defined by configuration definition and default VLAN is
created in the device for receiving BPDU packets for the port where port VLAN (untagged) is default.
VLAN tag at the time of sending packets
Handling of VLAN tag at the time of sending packets is according to Tagged / Untagged settings of
transmission port. In case of Tagged port, packets are sent with VLAN tag and in case of untagged port these
are sent without VLAN tag.
Port VLAN（untagged）
×
○
○
Does it match the VID,
Yes
which is defined port?
Discard
Yes
Yes
Yes
: Can be mixed,×: Cannot be mixed
Protocol VLAN（untagged）
○
○
○
Yes
Tag VLAN
Protocol ＶＬＡＮ
Port ＶＬＡＮ
Default ＶＬＡＮ（※）
Tag VLAN（Tagged）
○
○
○
Page 11 of 71
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