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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Principles

Principles

This section describes the implementation of traffic suppression and storm control.

Traffic Suppression

Traffic suppression prevents broadcast storms caused by broadcast packets, multicast packets, and unknown unicast packets in the following modes:

  • In the interface view, the device performs traffic suppression for these bandwidth percentage, packets per second, and bits per second on the inbound interface.

    The device detects rates of these packets on the interface and compares the rates with the thresholds. When the inbound traffic reaches the threshold, the system discards excess traffic.

  • In the interface view, the device can block outgoing broadcast packets, multicast packets, and unknown unicast packets on the outbound interface.

  • In the VLAN view, the device performs traffic suppression by bits per second for these packets.

    The device detects rates of these packets in the same VLAN and compares the rates with the thresholds. When the traffic in the VLAN reaches the threshold, the system discards excess traffic.

Storm Control

Storm control prevents broadcast storms caused by broadcast packets, multicast packets, and unknown unicast packets in the following modes:

The device performs storm control for these packets by packets per second.

In a detection interval, the device detects the average receiving rate of these packets and compares the average rate with the upper threshold. When the packet rate exceeds the upper threshold, the device performs storm control and takes a preconfigured storm control action to shut down the interface.

If the interface is shut down, you need to manually unblock the interface or enable the interface to automatically recover to the Up state.

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Updated: 2019-08-09

Document ID: EDOC1000041694

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