LevelOne ProCon GSW-2496 User Manual
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Metro Mode:
The Metro Mode is a quick configuration VLAN environment method
on Port-based VLAN. It will create 22 or 23 Port-based VLAN groups.
Double-tag:
Double-tag mode belongs to the tag-based mode, however, it would
treat all frames as the untagged ones, which means that tag with PVID
will be added into all packets. Then, these packets will be forwarded
as Tag-based VLAN. So, the incoming packets with tag will become
the double-tag ones.
Fig. 3-29