Cisco 500 Series - Page 607

Quality of Service
Configuring QoS - General
605 Cisco 500 Series Stackable Managed Switch Administration Guide
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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.
The following table describes the default mapping when there are 4 queues:
The following table describes the default mapping when there are 8 queues:
802.1p
Values
(0-7, 7 being
the highest)
Queue
(4 queues 1-
4, 4 being the
highest
priority)
Notes
0 1 Background
11 Best Effort
2 2 Excellent Effort
3 3 Critical Application - LVS
phone SIP
43 Video
5 4 Voice - Cisco IP phone
default
64 Interwork Control - LVS
phone RTP
74 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
0 1 1 Background