1141780,
Rev
002vx
3
‐
29
MEOLink
User
Manual
3.2.5.6
QoS
3.2.5.6.1
802.1
Q
Overview
The
802.1
Q
protocol
is
used
to
configure
virtual
LANS
and
to
provide
better
service
to
selected
traffic.
The
4
‐
byte
header
has
a
2
‐
byte
protocol
identifier
(TPID)
and
2
‐
byte
tag
control
information
(TCI).
The
TCI
contains
three
elements:
three
‐
bit
user
priority,
one
‐
bit
canonical
format
indicator
(CFI),
and
12
‐
bit
VLAN
identifier
(VID).
3.2.5.6.2
Queue
Monitoring/Configuration
and
Class
of
Service
Queue
monitoring
applies
an
algorithm
to
adjust
for
temporary
congestion
and/or
to
apply
prioritization
based
on
a
Class
of
Service
(CoS)
traffic
designation.
The
mechanisms
used
include
storing
excess
traffic
in
buffers
and
establishing
queues
based
on
the
CoS.
The
Traffic
Types—with
their
respective
CoS
designators—are
listed
below:
Background
(CoS
1)
[Lowest
Priority]
Spare
(CoS
2)
Best
Effort
(CoS
0)
Excellent
Effort
(CoS
3)
Controlled
Load
(CoS
4)
Video
(CoS
5)
Voice
(CoS
6)
Network
Control
(CoS
7)
[Highest
Priority]
Figure
32:
QoS
Configuration
Screen
Table
9:
QoS
Configuration
Parameters
Field
Definition/Configuration
Pause Frame Properties
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