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Configuration Guide - Security

S1720, S2700, S5700, and S6720 V200R011C10

This document describes the configurations of Security, including ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, Port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, URPF, keychain, MPAC, separating the management plane from the service plane, security risks, PKI.
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Configuring Traffic Suppression on an Interface

Configuring Traffic Suppression on an Interface

Context

Excess broadcast, unknown multicast, or unknown unicast packets will cause broadcast storms. You can configure traffic suppression for a specified type of packet on an interface to limit the rate of these packets.

The S1720GFR, S1720GW, S1720GWR, S1720X, S1720GW-E, S1720GWR-E, S1720X-E, S2720EI, S2750EI, S5720SI, S5720S-SI, S5710-X-LI, S5720LI, S5720S-LI, S5700LI, S5700S-LI, S5730SI, S5730S-EI, S6720LI, S6720S-LI, S6720SI, and S6720S-SI support two traffic suppression modes on interfaces: number of packets per second (pps) and number of bits per second (bit/s). The default mode is pps. The bit/s mode is more precise than the pps mode. Other models only support the pps mode.

NOTE:

You can configure suppression on broadcast, unknown multicast, and unknown unicast traffic on the same interface.

Pre-configuration Tasks

Before configuring traffic suppression on an interface, configure link layer protocol parameters for interfaces to ensure that the link layer protocol status on the interfaces is Up.

Procedure

  1. Run system-view

    The system view is displayed.

  2. (Optional) Run suppression mode { by-packets | by-bits }

    The traffic suppression mode is set.

    NOTE:

    Only the S1720GFR, S1720GW, S1720GWR, S1720X, S1720GW-E, S1720GWR-E, S1720X-E, S2720EI, S2750EI, S5720SI, S5720S-SI, S5710-X-LI, S5720LI, S5720S-LI, S5700LI, S5700S-LI, S5730SI, S5730S-EI, S6720LI, S6720S-LI, S6720SI, and S6720S-SI support this command.

    If the traffic suppression mode set in the system view is pps, the cir parameter cannot be specified when you set the maximum traffic rate on an interface.

    If the traffic suppression mode set in the system view is bit/s, the packets parameter cannot be specified when you set the maximum traffic rate on an interface.

  3. Run interface interface-type interface-number

    The interface view is displayed.

  4. Run { broadcast-suppression | multicast-suppression | unicast-suppression } { percent-value | cir cir-value [ cbs cbs-value ] | packets packets-per-second }

    Traffic suppression is configured.

    When traffic suppression is configured on interfaces of S1720GFR, S1720GW, S1720GWR, S1720X, S1720GW-E, S1720GWR-E, S1720X-E, S2720EI, S2750EI, S5720SI, S5720S-SI, S5710-X-LI, S5720LI, S5720S-LI, S5700LI, S5700S-LI, S5730SI, S5730S-EI, S6720LI, S6720S-LI, S6720SI, and S6720S-SI, the traffic suppression mode must be the same as that configured in the system view; otherwise, the system displays an error message.

  5. Run { broadcast-suppression | multicast-suppression | unicast-suppression } block outbound

    The interface is configured to block outgoing packets.

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Updated: 2019-03-28

Document ID: EDOC1000178177

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