3com 5500-ei pwr Installation Instruction

 

1-9 

# In the default conditions, where UP/DOWN log output is enabled, execute the shutdown command or 

the undo shutdown command on Ethernet 1/0/1. The Up/Down log information for Ethernet 1/0/1 is 

generated and displayed on the terminal. 

<Sysname> system-view 

System View: return to User View with Ctrl+Z. 

[Sysname] interface Ethernet 1/0/1 

[Sysname-Ethernet1/0/1] shutdown 

%Apr  5 07:25:37:634 2000 Sysname L2INF/5/PORT LINK STATUS CHANGE:- 1 - 

 Ethernet1/0/1 is DOWN 

[Sysname-Ethernet1/0/1] undo shutdown 

%Apr  5 07:25:56:244 2000 Sysname L2INF/5/PORT LINK STATUS CHANGE:- 1 - 

 Ethernet1/0/1 is UP 

# Disable Ethernet 1/0/1 from generating Up/Down log information and execute the shutdown 

command or the undo shutdown command on Ethernet 1/0/1. No Up/Down log information is 

generated or output for Ethernet 1/0/1.  

[Sysname-Ethernet1/0/1] undo enable log updown 

[Sysname-Ethernet1/0/1] shutdown 

[Sysname-Ethernet1/0/1] undo shutdown 

The storm control function is used to control traffic received on an Ethernet port.  

z 

With traffic upper and lower thresholds specified on a port, the system periodically collects 

statistics about the broadcast/multicast/unicast/ traffic on the port. Once it finds that a type of traffic 

exceeds the specified upper threshold, it blocks this type of traffic on the port or directly shuts down 

the port, and outputs trap/log information according to your configuration.  

z 

When a type of traffic on the port falls back to the specified lower threshold, the system cancels the 

blocking of this type of traffic on the port or brings up the port to restore traffic forwarding for the port, 

and outputs log/trap information according to your configuration.  

Follow these steps to configure storm control on a port: 

Enter system view 

— 

Enter Ethernet port view 

interface interface-type 
interface-number 

— 

Set the upper and lower 
thresholds of 
broadcast/multicast/unicast 
traffic received on the port 

storm-constrain { broadcast | 
multicast | unicast } 
max-packets min-packets { pps 
| kbps } 

Required 

Set the action to be taken when 
a type of traffic received on the 
port exceeds the upper 
threshold.  

storm-constrain control 
{ block | shutdown } 

Optional 

By default, no action is taken 
when a type of traffic reaches 
the upper threshold.