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Configuration Guide - Security

S7700 and S9700 V200R011C10

This document describes the configurations of Security, including ACL, reflective 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, separating the management plane from the service plane, security risks.
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Example for Configuring Traffic Suppression

Example for Configuring Traffic Suppression

Networking Requirements

In Figure 6-3, Switch A is connected to a Layer 2 network and a Layer 3 router. Switch A needs to be configured to prevent broadcast storms caused by a large number of broadcast packets, unknown multicast packets, or unknown unicast packets forwarded at Layer 2.

Figure 6-3  Networking diagram of traffic suppression

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure traffic suppression in the view of GE1/0/0 to prevent broadcast storms caused by a large number of broadcast packets, unknown multicast packets, or unknown unicast packets forwarded at Layer 2.

Procedure

  1. Enter the interface view.

    <HUAWEI> system-view
    [HUAWEI] sysname SwitchA
    [SwitchA] interface gigabitethernet 1/0/0

  2. Configure traffic suppression for broadcast packets. Set the CIR for broadcast traffic to 100 kbit/s.

    [SwitchA-GigabitEthernet1/0/0] broadcast-suppression cir 100

  3. Set bandwidth percentage for unknown multicast packets to 80%.

    [SwitchA-GigabitEthernet1/0/0] multicast-suppression 80

  4. Configure traffic suppression for unknown unicast packets. Set CIR for unknown unicast packets to 100 kbit/s.

    [SwitchA-GigabitEthernet1/0/0] unicast-suppression cir 100
    [SwitchA-GigabitEthernet1/0/0] quit

  5. Verify the configuration.

    Run the display flow-suppression interface command to view the traffic suppression configuration on GE1/0/0.

    [SwitchA] display flow-suppression interface gigabitethernet 1/0/0
     storm type         rate mode   set rate value
    -------------------------------------------------------------------------------
     unknown-unicast    bps         cir: 100(kbit/s), cbs: 18800(byte)
     multicast          percent     percent: 80%
     broadcast          bps         cir: 100(kbit/s), cbs: 18800(byte)
    -------------------------------------------------------------------------------
    

Configuration Files

Switch A configuration file

#
sysname SwitchA
#
interface GigabitEthernet1/0/0
 unicast-suppression cir 100 cbs 18800
 multicast-suppression 80
 broadcast-suppression cir 100 cbs 18800  
#
return
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Updated: 2019-04-01

Document ID: EDOC1000178319

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