Software User Manual
D-Link Unified Access System
12/10/09
Document
34CSFP6XXUWS-SWUM100-D7
Configuring Class of Service
Page 335
To activate a policy on an interface, select the interface and the policy, and then click
Submit
.
C
ONFIGURING
C
LASS
OF
S
ERVICE
The Class of Service (CoS) queueing feature lets you directly configure certain aspects of switch queueing. This provides
the desired QoS behavior for different types of network traffic when the complexities of DiffServ are not required. The priority
of a packet arriving at an interface can be used to steer the packet to the appropriate outbound CoS queue through a
mapping table. CoS queue characteristics that affect queue mapping, such as minimum guaranteed bandwidth, transmission
rate shaping, etc., are user-configurable at the queue (or port) level. The system supports eight (0 to 7) queues per port.
The Class of Service folder contains links to the following features:
•
•
•
“IP DSCP Mapping Configuration”
•
•
“CoS Interface Queue Configuration”
•
M
APPING
802.1
P
P
RIORITY
The IEEE 802.1p feature allows traffic prioritization at the MAC level. The switch can prioritize traffic based on the 802.1p
tag attached to the L2 frame. Each port on the switch has multiple queues to give preference to certain packets over others
based on the class of service (CoS) criteria you specify. When a packet is queued for transmission in a port, the rate at which
it is serviced depends on how the queue is configured and possibly the amount of traffic present in the other queues of the
port. If a delay is necessary, packets get held in the queue until the scheduler authorizes the queue for transmission.
Use the 802.1p Priority Mapping page in the Class of Service folder to assign 802.1p priority values to various traffic classes
on one or more interfaces.
To display the
page, click
LAN > QoS
> Class of Service
>
802.1p Priority Mapping
in the navigation tree.
Figure 236: 802.1p Priority Mapping