By default, the vlan on a packet is "1" (native).
if your sonic router has no vlan on a trunk port, actually, it's the same thing when you untagged the vlan with number 1 (native mode)
and if you want to passed other vlan, or specific vlan you must t...
if you want to see if a devices is connected you can write this command
sh fdb | grep [@mac]
if your mac address appear after this command its that the level 2 is correct and in that case it s a pc problem not network problem except if this mac add...
