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S1720GFR, S2700, S5700, and S6720 V200R010C00 Web-based Configuration Guide

This document describes the configuration and maintenance of device through the web network management system. The web network management system provides the functions of viewing device information and managing the entire system, interfaces, services, ACL, QoS, routes, security, and tools.
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Storm Control

Storm Control

Traffic suppression and storm control are security technologies to control broadcast packets, unknown multicast packets, and unknown unicast packets and to prevent broadcast storms caused by these packets.

Context

Traffic suppression limits the traffic by setting a threshold, and storm control blocks the traffic by shutting down an interface.

Storm Control

Storm control can prevent broadcast storms caused by broadcast, unknown multicast, or unknown unicast packets.

Context

Storm control is configured in the interface view to limit the number of packets per second.

In a detection interval, a device with storm control configured monitors the average rates of incoming packets on an interface and compares the average rates with the thresholds. When the rate of a particular type of packets exceeds the threshold allowed for these packets, the device performs storm control and takes a storm control action on the interface.

Storm control actions include Blocked and Shutdown. An interface that is blocked or shut down can be recovered in the following ways:
  • When the average rates of incoming packets on a blocked interface fall below the lower thresholds, the interface is unblocked to forward packets.
  • If the action is Shutdown, you need to manually unblock the interface or enable the interface to automatically recover to the Up state.

Procedure

  • Configure storm control.
    1. Choose Security > Storm Control > Storm Control in the navigation tree to open the Storm Control page, as shown in Figure 2-215.

      Figure 2-215  Storm Control

    2. Select an interface and click Configure to open the Storm Control page, as shown in Figure 2-216.

      Figure 2-216  Storm Control on Interface

      Table 2-127 describes the parameters on the page.

      Table 2-127  Storm Control

      Parameter

      Description

      Interface name

      Indicates the interface where storm control is configured.

      Action

      Indicates the storm control action, including interface shutdown and packet blocking.

      Status

      Indicates the type of packets for which storm control is configured, including unicast, multicast, and broadcast packets.

      Upper threshold

      Indicates the upper threshold of packet rate, in pps. This parameter is valid only when storm control is enabled.

      Lower threshold

      Indicates the lower threshold of packet rate, in pps. This parameter is valid only when storm control is enabled.

    3. Set the required parameters.
    4. Click OK to complete the configuration.
  • Query storm control information.
    1. Choose Security > Storm Control > Storm Control in the navigation tree to open the Storm Control page.
    2. In the Query area, select an interface type and enter the interface number, and click Query.

Traffic Suppression

Traffic suppression limits traffic rate on a switch, to prevent broadcast storms caused by broadcast, unknown multicast, or unknown unicast packets.

Context

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

Procedure

  • Configure traffic suppression.
    1. Choose Security > Storm Control > Traffic Suppression in the navigation tree to open the Storm Control page, as shown in Figure 2-217.

      Figure 2-217  Traffic Suppression

    2. Select an interface and click Configure to open the Traffic Suppression page, as shown in Figure 2-218.

      Figure 2-218  Traffic Suppression on Interface

      Table 2-128 describes the parameters on the page.

      Table 2-128  Traffic Suppression

      Parameter

      Description

      Interface name

      Indicates the interface where traffic suppression is configured.

      Status

      Indicates the type of packets for which traffic suppression is configured, including unicast, multicast, and broadcast packets.

      Drop threshold

      Indicates the traffic suppression mode and threshold. This parameter is valid only when traffic suppression is enabled. Traffic suppression modes include:
      • Based on bandwidth percentage
      • Based on packet rate
      • Based on the number of bytes

      The supported traffic suppression modes depend on device models. The modes displayed on your web NMS may be different from the parameters listed here.

    3. Set the required parameters.
    4. Click OK to complete the configuration.
  • Query traffic suppression information.
    1. Choose Security > Storm Control > Traffic Suppression in the navigation tree to open the Traffic Suppression page.
    2. In the Query area, select an interface type and enter the interface number, and click Query.
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Updated: 2019-08-21

Document ID: EDOC1000114003

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