Q-Lite Satellite Modem Installation and Operating Handbook
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Figure 7-13 Traffic Shaping Configuration Screen using IEEE 802.1p Priority Tags
7.8.10.4.4 Other QoS Classification Methods
Stream classification may be based on VLAN ID. VLAN tags can be added externally or by
the modem.
Stream classification may also be based on MPLS QoS, specifically the 3-bit EXP field in
the MPLS header. This is often used to support Diffserv in MPLS networks. The MPLS
EXP field has eight possible values, mapping directly to equivalent internal modem classes
(0 to 7) each of which can be shaped using its own CIR, BIR, etc. Each packet passed to
the modem must have this field set to the appropriate value in order for the modem to
recognize the different data streams.
7.8.10.5 Traffic Shaping Graphs
A web graphing facility exists that shows a line graph of throughput (in terms of bps) over
time for each QoS class. The data for each class is not superimposed, instead it is
necessary to select the particular class to be monitored graphically from a dropdown box. It
is easy to switch between graphs for the different classes in order to check that the level of
throughput is in line with expectations.
Graphs are time based and are shown in minute, hour, day and month formats. It is
intended to add diagnostic graphs per class in the future for errored packets and dropped
packets.