Installation Manual

INS_CWGE26FX2TX24MSPOE_REV– 5 Mar 2014 PAGE 64
INSTALLATION AND OPERATION MANUAL CWGE26FX2TX24MSPOE
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Port Classification
QoS is an acronym for Quality of Service. It is a method to guarantee a bandwidth relationship
between individual applications or protocols.
Label Description
Port The port number for which the configuration below applies
QoS Class Controls the default QoS class.
All frames are classified to a QoS class. There is a one to one mapping between QoS
class, queue and priority. A QoS class of 0 (zero) has the lowest priority.
If the port is VLAN aware and the frame is tagged, then the frame is classified to a QoS
class that is based on the PCP value in the tag as shown below. Otherwise the frame is
classified to the default QoS class.
PCP value: 0 1 2 3 4 5 6 7
QoS class: 1 0 2 3 4 5 6 7
If the port is VLAN aware, the frame is tagged and Tag Class is enabled, then the
frame is classified to a QoS class that is mapped from the PCP and DEI value in the tag.
Otherwise the frame is classified to the default QoS class.
The classified QoS class can be overruled by a QCL entry.
Note: If the default QoS class has been dynamically changed, then the actual default
QoS class is shown in parentheses after the configured default QoS class.