Example for Configuring Storm Control

Networking Requirements

In Figure 1, 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 1 Networking diagram of storm control

Configuration Roadmap

The configuration roadmap is as follows:

Configure storm control in the interface view of GE0/0/1 to prevent broadcast storms caused by a large number of broadcast packets, unknown multicast packets, or unknown unicast packets forwarded at Layer 2.

Procedure

Enter the interface view.

<HUAWEI> system-view
[HUAWEI] sysname SwitchA
[SwitchA] interface gigabitethernet0/0/1

Configure storm control for broadcast packets.

[SwitchA-GigabitEthernet0/0/1] storm-control broadcast min-rate 1000 max-rate 2000

Configure storm control for unknown multicast packets.

[SwitchA-GigabitEthernet0/0/1] storm-control multicast min-rate 1000 max-rate 2000

Configure storm control for unknown unicast packets.

[SwitchA-GigabitEthernet0/0/1] storm-control unicast min-rate 1000 max-rate 2000

Set the storm control action to block.

[SwitchA-GigabitEthernet0/0/1] storm-control action block

Enable the system to record logs during storm control.

[SwitchA-GigabitEthernet0/0/1] storm-control enable log

Set the detection interval.

[SwitchA-GigabitEthernet0/0/1] storm-control interval 90
[SwitchA-GigabitEthernet0/0/1] quit

Verify the configuration.

Run the display storm-control interface command to view storm control configuration on GE0/0/1.

[SwitchA] display storm-control interface gigabitethernet 0/0/1
--------------------------------------------------------------------------------
PortName     Type      Rate      Mode Action   Punish-  Trap Log Int Last-
                       (Min/Max)               Status                Punish-Time
--------------------------------------------------------------------------------
GE0/0/1      Broadcast 1000      Pps  Block    Normal   Off  On  90  -           
                       /2000                                                    
GE0/0/1      Multicast 1000      Pps  Block    Normal   Off  On  90  -           
                       /2000                                                    
GE0/0/1      Unicast   1000      Pps  Block    Normal   Off  On  90  -          
                       /2000                                                    
--------------------------------------------------------------------------------

Configuration Files

Switch A configuration file

#
sysname SwitchA
#
interface GigabitEthernet0/0/1
 storm-control broadcast min-rate 1000 max-rate 2000
 storm-control multicast min-rate 1000 max-rate 2000
 storm-control unicast min-rate 1000 max-rate 2000
 storm-control interval 90
 storm-control action block
 storm-control enable log
#
return