Switch > Qos; Switch > Qos > Port Classification - Transition Networks SM TAT4X Series Web User Manual

Transition Networks SMxxTAT4Xx Web User Guide
Switch > QoS
QoS (Quality of Service) is a method to guarantee a bandwidth relationship between individual applications or
protocols. A communications network transports a multitude of applications and data, including high‐quality
video and delay‐sensitive data such as real‐time voice. Networks must provide secure, predictable, measurable,
and sometimes guaranteed services. Achieving the required QoS becomes the secret to a successful end‐to‐end
business solution.
Switch > QoS > Port Classification
This page lets you configure basic QoS Classification settings for all switch ports.
Port: The port number for which the configuration below applies.
Queue Priority: Controls the default CoS value. All frames are classified to a CoS. There is a one to one mapping
between CoS, queue and priority. A CoS of 0 (zero) has the lowest priority.
If the port is VLAN aware, the frame is tagged and Tag Class. is enabled, then the frame is classified to a CoS that
is mapped from the PCP and DEI value in the tag. Otherwise the frame is classified to the default CoS.
The classified CoS can be overruled by a QCL entry.
Note: If the default CoS has been dynamically changed, then the actual default CoS is shown in parentheses after
the configured default CoS.
DPL: Controls the default DPL value. All frames are classified to a Drop Precedence Level.
If the port is VLAN aware, the frame is tagged and Tag Class. is enabled, then the frame is classified to a DPL that
is mapped from the PCP and DEI value in the tag. Otherwise the frame is classified to the default DPL.
The classified DPL can be overruled by a QCL entry.
PCP: Controls the default PCP value. All frames are classified to a PCP value.
If the port is VLAN aware and the frame is tagged, then the frame is classified to the PCP value in the tag.
Otherwise the frame is classified to the default PCP value.
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