Network Administration: Quality of Service
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FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Astute\User
Guide\Dell_Astute_Network_Admin_QoS.fm
D E L L CO N F I D E N T I A L – P R E L I M I N A RY 8 / 9 / 16 - F O R P RO O F O N L Y
–
Enable Egress Shaping Rate
— Enable/disable egress traffic
limitation. If this field is selected, enter the following fields.
–
Committed Information Rate (CIR)
— Enter the average maximum
amount of data allowed to be sent on the egress interface, measured in
bits per second.
–
Committed Burst Size (CBS)
— Enter the maximum burst of data
that is allowed to be sent on the egress interface, even though it is
above the CIR. This is defined in number of bytes of data.
TCP Congestion Avoidance
Use the
TCP Congestion Avoidance
page to activate a congestion avoidance
algorithm. The algorithm breaks up or prevents TCP global synchronization
in a congested node, where the congestion manifests when multiple sources
reduce transmission to the congested node due to packet dropping and
increase the transmission again at the same time.
To configure TCP congestion avoidance:
1
Click
Network Administration > Quality of Service
>
Global Settings
>
TCP Congestion Avoidance
.
NOTE:
TCP Congestion Avoidance increases network reliability, but it also
increases network traffic. Continue only if you are sure changing the setting will
improve the TCP congestion on the affected network segment. For this change to be
effective you must save the configuration and reboot the device.
2
Click
Edit
and select either Enabled/Disabled to
TCP Congestion
Avoidance
to enable/disable the algorithm.
QoS Mapping
This section contains the following topics:
• Overview
• DSCP Mapping
• Class Mapping
• Policers
• Aggregate Policer
• Policy Table