I was reading a product sheet about a Metro-Ethernet backhaul service which mentions, which is described as a mechanism to connect two datacentres within the same region (ie, city) via point-to-point Ethernet, deployed as an ‘MPLS Pseudowire’. It mentions that "the service is available at any of our on-net datacentres and in a choice of capacities including: 100Mbps, gigE and 10G – as well as fractional 10G."
What is a fractional port in this context? My understanding is that its a port split in multiple VLANs (trunk port) and the customer is assigned with a VLAN at a capacity that is a fraction of the original physical port capacity. For example, in that case the customer can get a 2G fractional port through VLANs mapped to the physical port?