107
QoS Configuration
Quality of Service (QoS) is the ability to provide different priority to different applications,
users or data flows, or to guarantee a certain level of performance to a data flow. QoS
guarantees are important if the network capacity is insufficient, especially for real-time
streaming multimedia applications such as voice over IP or Video Teleconferencing,
since these often require fixed bit rate and are delay sensitive, and in networks where the
capacity is a limited resource, for example in cellular data communication. In the
absence of network congestion, QoS mechanisms are not required.
QoS Policy and Priority Type
Here you can choose to use an 8-4-2-1 queuing scheme or a strict priority scheme, or
select the priority type to configure QoS policy.
QoS Policy:
Select the QoS policy rule.
Using the 8,4,2,1 weight fair queue scheme:
The switch will follow 8:4:2:1
rate to process priority queue from High to lowest queue. For example, while
the system processing, 1 frame of the lowest queue, 2 frames of the low queue,
4 frames of the middle queue, and 8 frames of the high queue will be processed
at the same time in accordance with the 8,4,2,1 policy rule.
Use a strict priority scheme:
Always the higher queue will be processed first,
except the higher queue is empty.
Priority Type:
There are 5 priority type selections available
—
Port-based
,
TOS
only
,
COS only
,
TOS first
, and
COS first
. Disable means no priority type is
selected.
Click
Apply
to have the configuration take effect.
Summary of Contents for LPES-2208CA
Page 2: ...Revision History Document Release Date Revision Initials 1 00 Aug 28 2009 New Edit Vincent ...
Page 57: ...50 IP Configuration interface ...
Page 66: ...59 Syslog Configuration interface ...
Page 68: ...61 SMTP Configuration interface ...
Page 70: ...63 Event Configuration interface ...
Page 74: ...67 Click Apply to have the configuration take effect SNTP Configuration interface ...
Page 76: ...69 IP Security interface ...
Page 79: ...72 Port Statistics interface ...
Page 81: ...74 Port Control interface ...
Page 91: ...84 State Activity of Switch 2 ...
Page 105: ...98 RSTP System Configuration interface ...
Page 107: ...100 RSTP Port Configuration interface ...
Page 109: ...102 SNMP System Configuration interface ...
Page 112: ...105 SNMP v3 configuration interface ...
Page 115: ...108 QoS Configuration interface Port Based Priority Configure per port priority level ...
Page 118: ...111 IGMP Configuration interface ...