How to process Vlan 0 packet ?

The S and E Switch will process VLAN0 packets as follows�?if VLAN ID is 0,mean that there is no virtual network identifier in the frame, only carry priority.
if the VLAN 0 packet can match traffic policy or ACL, this packet will be processed as Tagged packet, if can not match, the VLAN 0 packet will be processed as untagged packet, it will be added a default tag.

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