Linksys SLM224G4S - Manual (Page 38)

Chapter  Configuration Using the Web-based Utility
2 24/48-Port 10/100 + 4-Port Gigabit Resilient Clustering Smart Switch with 2 Combo SFPs
Usage Type This is the RADIUS server authentication
type. The possible values are:
Login (Default value) Indicates that the RADIUS server
is used for authenticating user name and passwords.
802.1X Indicates that the RADIUS server is used for
802.1X authentication.
All Indicates that the RADIUS server is used for
authenticating user name and passwords, and 802.1X
port authentication.
Click Add to List to add the RADIUS configuration to the
RADIUS table at the bottom of the screen.
Click Save Settings to save the changes, or Cancel
Changes to cancel the changes.
QoS
Network traffic is usually unpredictable, and the only
basic assurance that can be offered is best effort traffic
delivery. To overcome this challenge, Quality of Service
(QoS) is applied throughout the network. This ensures that
network traffic is prioritized according to specified criteria,
and that specific traffic receives preferential treatment.
QoS in the network optimizes network performance and
entails two basic facilities:
Classifying incoming traffic into handling classes, based
on an attribute, including:
The ingress interface
Packet content
A combination of these attributes
Providing various mechanisms for determining the
allocation of network resources to different handling
classes, including:
The assignment of network traffic to a particular
hardware queue
The assignment of internal resources
Traffic shaping
The terms Class of Service (CoS) and QoS are used in the
following context:
CoS provides varying Layer 2 traffic services. CoS
refers to classifying traffic into traffic classes, where
each class is handled as an aggregate whole, with no
per-flow settings. CoS is usually related to the 802.1p
service that classifies flows according to their Layer 2
priority, as set in the VLAN header.
QoS refers to Layer 2 traffic and above. QoS handles
per-flow settings, even within a single traffic class.
The QoS configuration options are CoS Settings, Queue
Settings, DSCP Settings, and Basic Mode.
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QoS > CoS Settings
The CoS Settings screen is used to enable or disable CoS.
QoS > CoS Settings
CoS Settings
QoS Mode Indicates if QoS is enabled. The possible
values are:
Disable Disables QoS.
Basic Enables QoS. This is the default value.
Class of Service Specifies the CoS priority tag values,
where 0 is the lowest and  is the highest.
Queue Defines the traffic forwarding queue to which the
CoS priority is mapped. Four traffic priority queues are
supported.
Click Restore Defaults to restore the device factory
defaults for mapping CoS values to a forwarding queue.
CoS Default
Unit No. The unit to which the CoS configuration applies.
Default CoS Determines the default CoS value for
incoming packets for which a VLAN tag is not defined. The
possible field values are 0-. The default CoS is 0.
LAG The LAG to which the port belongs, if relevant. If the
port is a member of a LAG, the LAG settings override the
port settings.
Click Save Settings to save the changes, or Cancel
Changes to cancel the changes.
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