Configuring Quality of Service
Configuring QoS - General
Cisco Small Business 200 Series Smart Switch Administration Guide 277
20
STEP 3 Click Apply. The queues are configured, and the Running Configuration file is
updated.
Mapping CoS/802.1p to a Queue
The
CoS/802.1p to Queue
page maps 802.1p priorities to egress queues. The
CoS/802.1p to Queue Table determines the egress queues of the incoming
packets based on the 802.1p priority in their VLAN Tags. For incoming untagged
packets, the 802.1p priority is the default CoS/802.1p priority assigned to the
ingress ports.
Default Mapping Queues
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.
CoS/802.1p to Queue mapping is applicable only if CoS/802.1p is the trusted
mode and the packets belong to flows that are CoS trusted.
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
0 1 Normal Background
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
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