Linksys SLM224G2

Chapter 5
Advanced Configuration
23
24-Port 10/100 + 2-Port 10/100/1000 Gigabit Advanced Smart Switch with 2 Combo SFPs
QoS > CoS Settings
The priority levels recommended in the IEEE 802.1p
standard for various network applications are shown in the
following table. However, you can map the priority levels
to the Switch’s output queues in any way that benefits
application traffic for your own network.
Priority Level Mappings
Priority Level Traffic Type
1 Background
2 (Spare)
0 (Default) Best Effort
3 Excellent Effort
4 Controlled Load
5 Video, less than 100 ms latency and jitter
6 Voice, less than 10 ms latency and jitter
7 Network Control
Priority Specifies the CoS priority tag values, where zero
is the lowest and 7 is the highest.
Queue Defines the traffic forwarding queue to which the
CoS priority is mapped. Four traffic priority queues are
supported.
Click Save Settings to save the changes.
QoS > Queue Settings
The Switch prioritizes each packet based on the required
level of service, using four priority queues with strict or
Weighted Round Robin Queuing. It uses IEEE 802.1p and
802.1Q tags to prioritize incoming traffic based on input
from the end-station application. These functions can be
used to provide independent priorities for delay-sensitive
data and best-effort data.
QoS > Queue Settings
Scheduling Method
You can set the Switch to service the queues based on
a strict rule that requires all traffic in a higher priority
queue to be processed before lower priority queues are
serviced, or use Weighted Round-Robin (WRR) queuing
that specifies a relative weight of each queue. WRR uses a
predefined relative weight for each queue that determines
the percentage of service time the Switch services each
queue before moving on to the next queue. This prevents
the head-of-line blocking that can occur with strict priority
queuing.
Strict Priority Services the egress queues in sequential
order, transmitting all traffic in the higher priority
queues before servicing lower priority queues.
WRR Weighted Round-Robin shares bandwidth at the
egress ports by using scheduling weights 1, 2, 4, 8 for
queues 1 through 4 respectively.
Click Save Settings to save the changes.
QoS > Port Based Mode
The Port-Based Settings enables mapping port to specific
priority level. By default, all ports are set to low priority
level.
QoS > Port Based Mode
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