Chapter 8
| Congestion Control
Storm Control
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Web Interface
To configure rate limits:
1. Click Traffic, Rate Limit.
2. Enable the Rate Limit Status for the required ports.
3. Set the rate limit for the individual ports,.
4. Click Apply.
Figure 122: Configuring Rate Limits
Storm Control
Use the Traffic > Storm Control page to configure broadcast, multicast, and
unknown unicast storm control thresholds. Traffic storms may occur when a device
on your network is malfunctioning, or if application programs are not well
designed or properly configured. If there is too much traffic on your network,
performance can be severely degraded or everything can come to complete halt.
You can protect your network from traffic storms by setting a threshold for
broadcast, multicast or unknown unicast traffic. Any packets exceeding the
specified threshold will then be dropped.
Command Usage
◆ Storm Control is disabled by default.
◆ Broadcast control does not effect IP multicast traffic.
◆ When traffic exceeds the threshold specified for broadcast and multicast or
unknown unicast traffic, packets exceeding the threshold are dropped until the
rate falls back down beneath the threshold.
◆ Storm control is a hardware level function. Traffic storms can also be controlled
at the software level using automatic storm control which triggers various
control responses (see “Automatic Traffic Control” on page 206). However, only
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