Allied Telesis AlliedView-EMS 4.0.2 VLAN-Manager - Manual (Page 55)

AlliedView™-EMS 4.0.2 VLAN MANAGER USER’S GUIDE Page 55 of 77
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When adding/modifying a Nested VLAN, specifying 2 or more core ports where one
of the specified ports is already a member of an existing Nested VLAN will result
in the error message: "Must return port <n> to the default VLAN as untagged port
based."
6 Device Support