Dell PowerEdge VRTX - Manual (Page 429)

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FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Plasma\User
Guide\Plasma_UGQoS.fm
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Mapping to Queue
This section provides information for mapping DSCP and CoS values to
service queues, and contains the following topics:
• CoS to Queue
• DSCP to Queue
CoS to Queue
The CoS to Queue page maps CoS priorities to an egress queue, meaning
that the egress queues of the incoming packets is based on the CoS priority in
their VLAN Tags. For incoming, untagged packets, the CoS priority is the
default CoS priority assigned to ingress ports.
By changing CoS to Queue mapping, Queue schedule method, and
bandwidth allocation, it is possible to achieve the desired quality of services in
a network.
The CoS to Queue mapping is applicable only if one of the following exists:
• The switch is in QoS Basic mode, and CoS is the trusted mode.
• The switch is in QoS Advanced mode, and the packets belong to flows that
are CoS trusted.
To map CoS values to egress queues:
1 Click Quality of Service > General > CoS to Queue in the tree view to
display the CoS to Queue page.
The CoS/queue mappings are displayed.
2 Enter the fields:
– Class of Service — The CoS priority tag values, where zero is the
lowest priority and 7 is the highest priority.
– Queue — The queue to which the CoS priority is mapped.