Quality of Service
Configuring QoS - General
Cisco 500 Series Stackable Managed Switch Administration Guide 606
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By changing the CoS/802.1p to Queue mapping (CoS/802.1p to Queue) and the
Queue schedule method and bandwidth allocation (Queue page), it is possible to
achieve the desired quality of service in a network.
The CoS/802.1p to Queue mapping is applicable only if one of the following exists:
• The device is in QoS Basic mode and CoS/802.1p trusted mode
• The device is in QoS Advanced mode and the packets belong to flows that
are CoS/802.1p trusted
Queue 1 has the lowest priority, queue 4 or 8 has the highest priority.
To map CoS values to egress queues:
STEP 1 Click Quality of Service > General > CoS/802.1p to Queue.
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.
12 1 Best Effort
2 3 2 Excellent Effort
3 6 5 Critical Application - LVS
phone SIP
45 4 Video
5 8 7 Voice - Cisco IP phone
default
68 7 Interwork Control
LVS phone RTP
77 6 Network Control
802.1p
Values
(0-7, 7 being
the highest)
Queue
(8 queues 1-
8, 8 is the
highest
priority)
Standalone
7 Queues
(8 is the highest
priority used for
stack control
traffic) Stack
Notes
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