Cisco 350 Series Administration Manual page 640

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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.
The following table describes the default mapping when there are 8 queues:
802.1p Values Queue
(0-7, 7 being the (8 queues 1-8, 8
highest) is the highest
priority)
0 1
1 2
2 3
3 6
4 5
5 8
6 8
7 7
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
7 Queues
(8 is the highest
priority used for
stack control traffic)
Stack
1
1
2
5
4
7
7
6
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4
Quality of Service
General
Notes
Background
Best Effort
Excellent Effort
Critical Application - LVS
phone SIP
Video
Voice - Cisco IP phone
default
Interwork Control
LVS phone RTP
Network Control