4. Change Port 1’s PVID to 15, and set Port 1 to DOT1Q-TUNNEL mode and Port 26 to
TRUNK mode.
Switch Management>VLAN Configuration>IEEE 802.1q Tag VLAN>VLAN Interface
Treatments of Packets:
1. A tagged packet arrives at Port 1
When a packet with a tag 12 arrives at Port 1, the original tag will be kept intact and then
added an outer tag 15 by Port 1, which is set as a tunnel port. When this packet is forwarded to
Port 26, two tags will be forwarded out because Port 26 is set as a trunk port.
2. A untagged packet arrives at Port 1
If an untagged packet is received, it will also be added a tag 15. However, Q-in-Q function will
not work.
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