Configuring Quality of Service
Configuring QoS
Cisco Small Business 300 Series Managed Switch Administration Guide 253
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By changing the CoS/802.1p to Queue mapping and the Queue schedule method
and bandwidth allocation, it is possible to achieve the desired quality of services
in a network.
The CoS/802.1p to Queue mapping is applicable only if one of the following exists:
• The switch is in QoS Basic mode and CoS/802.1p trusted mode
• The switch is in QoS Advanced mode and the packets belong to flows that
are CoS/802.1p trusted
To map CoS values to egress queues:
STEP 1 Click Quality of Service > General > CoS/802.1p to Queue. The
CoS/802.1p to
Queue Page
opens.
STEP 2 Enter the parameters.
• 802.1p—Displays the 802.1p priority tag values to be assigned to an egress
queue, where 0 is the lowest and 7 is the highest priority.
• Output Queue—Select the egress queue to which the 802.1p priority is
mapped. Four egress queues are supported, where Queue 4 is the highest
priority egress queue and Queue1 is the lowest priority.
11 NormalBest Effort
2 2 Normal Excellent Effort
3 3 Normal Critical Application
LV S p h o n e S I P
43 Normal Video
54 High Voice
Cisco IP phone default
64 High Interwork Control
LVS phone RTP
74 High Network Control
802.1p
Values
(0-7, 7 being
the highest)
Queue
(4 queues 1-
4, 4 being the
highest
priority)
Queue
(2 queues:
Normal and
High)
Notes
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