Web Interface – Configuration
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 (QoS Control List) 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 drop precedence level. 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 Set or show the default PCP value. All frames are classified to a PCP value.
PCP is an acronym for Priority Code Point. It is a 3-bit field storing the priority level for the 802.1Q frame. It is also known as User Priority. A PCP of 0 (zero) has the lowest priority. 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. DEI Set or show the default DEI value. All frames are classified to a DEI value. DEI is an acronym for Drop Eligible Indicator. It is a 1-bit field in the VLAN tag: 1: drop eligible 0: not drop eligible (default) If the port is VLAN aware and the frame is tagged, then the frame is classified to the DEI value in the tag. Otherwise the frame is classified to the default DEI value.
Tag Class. Shows the classification mode for tagged frames on this port. Disabled: Use default CoS and DPL for tagged frames. Enabled: Use mapped versions of PCP and DEI for tagged frames. Click on the mode in order to configure the mode and/or mapping.
Confidential
User Guide: CE Services
Page 341
Made with FlippingBook interactive PDF creator