Automatic Traffic Control; Figure 123: Configuring Storm Control; Figure 124: Storm Control By Limiting The Traffic Rate - Edge-Core ECS4210-12P Web Management Manual

Chapter 8
| Congestion Control

Automatic Traffic Control

Automatic Traffic Control

Figure 123: Configuring Storm Control

Use the Traffic > Auto Traffic Control pages to configure bounding thresholds for
broadcast and multicast storms which can automatically trigger rate limits or shut
down a port.
Command Usage
ATC includes storm control for broadcast or multicast traffic. The control response
for either of these traffic types is the same, as shown in the following diagrams.

Figure 124: Storm Control by Limiting the Traffic Rate

Storm Alarm Storm Alarm
Traffic Traffic
Fire TRAP Fire TRAP
[kpps] [kpps]
StromAlarm StromAlarm
Alarm Fire Alarm Fire
ClearTRAP ClearTRAP
Threshold Threshold
（1～255kpps ） （1～255kpps ）
AlarmClear AlarmClear
Threshold Threshold
（1～255kpps ） （1～255kpps ）
The key elements of this diagram are described below:
◆
Alarm Fire Threshold – The highest acceptable traffic rate. When ingress traffic
exceeds the threshold, ATC sends a Storm Alarm Fire Trap and logs it.
◆
When traffic exceeds the alarm fire threshold and the apply timer expires, a
traffic control response is applied, and a Traffic Control Apply Trap is sent and
logged.
TrafficControl TrafficControl
Apply Trap Apply Trap
Storm Alarm Storm Alarm
Fire TRAP Fire TRAP
Apply Timer Apply Timer
expired expired
Auto Storm Control Auto Storm Control
(0～300sec) (0～300sec)
– 206 –
Traffic without storm control Traffic without storm control
Traffic with storm control Traffic with storm control
StromAlarm StromAlarm
ClearTRAP ClearTRAP
TrafficControl TrafficControl
Release Trap Release Trap
Release Timer Release Timer
expired expired
(0～300sec) (0～300sec)
Time Time