Ethernet Port Settings: Difference between revisions
 
The link you have can carry one or more service - the common one being for internet access. However the same link can have internet access and site-to-site access, and multiple such services and different speeds. All of the services will have a separate VLAN tag.
 
Where there is only one service on the link then this can be set to operate with no VLAN tag.
 
Where a dedicated site-to-site fibre is used then any packets simply go to the other end including any VLAN tags. This link is effectively a very long Ethernet cable, though still subject to packet size limits.
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