Configuring Random Early Detection; Figure 85: Storm Control Configuration - LevelOne GSW-4876 User Manual

Unit - The unit of measure. (Options: kbps, Mbps, fps or kfps;
◆
Default: kbps)
W I
EB
To configure Storm Control:
Click Configuration, QoS, Storm Control.
1.
Enable storm control for unicast, broadcast, or unknown traffic by
2.
marking the Enable box next to the required ports.
Select the control rate and unit of measure for each frame type.
3.
Click Save.
4.

Figure 85: Storm Control Configuration

Use the Weighted Random Early Detection Configuration page to control
C
ONFIGURING
traffic congestion on output queues using Random Early Detection (RED).
R E
ANDOM ARLY
This method controls the average queue size by randomly dropping
D
ETECTION
packets at a moderate rate as the network load moves above a specified
minimum threshold, and then at a more aggressive rate when it reaches
drop probabilities DP1 - DP3. If the source is using TCP, it will automatically
decrease its transmission rate once it notices that packets are being
dropped. RED and TCP work together to cause hosts to adjust their
transmissions to a rate the network can handle.
P
ATH
Basic/Advanced Configuration, QoS, WRED
C
OMMAND
Neither Novell NetWare nor AppleTalk respond robustly to packet loss,
◆
either ignoring the dropped packets, or resending them at the same
rate. If a significant percentage of the network's traffic employs these
protocols, it is not advisable to enable RED.
Every incoming frame is classified into a Drop Precedence (DP) level,
◆
which is used throughout the switch to provide congestion control for
frames according to the weight assigned to each DP level. Inbound
traffic is marked for drop precedence using a three-color priority
NTERFACE
U
SAGE
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| Configuring the Switch
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HAPTER
Quality of Service