How do you get this switch to do traffic prioritization according to VLAN?

[Kol Khara]

The documentation of the 3com 4900 switch says this:

Traffic Classification
To determine the service level to be applied to each incoming traffic type,
each packet or frame must first be classified. Traffic classification is the
means of identifying which application, device or user generated the
traffic.
Incoming traffic can be classified (identified) by
■ IEEE 802.1D priority
■ EtherType

I want it to prioritize traffic according to the VLAN the traffic came from, but wikipedia says that only IEEE 802.1Q supports VLANs. So what can I do here?

 

[wiretap]

It looks like according to their user manual that you can prioritize traffic by enabling QoS. (via command line or the 3Com Network Supervisor app) Their manual also says you can't have a per-port basis for QoS. It doesn't look like it supports prioritizing one VLAN over another. But QoS should get you close if you know what type traffic you want high priority on.