3com WX3000 Manuel D’Utilisation

 

1-5 

Configure the available 
auto-negotiation speed(s) for 
the port 

speed auto [ 10 | 100 | 1000 ]*

Optional 

By default, the port speed is 
auto-negotiated. 

 

z 

Only ports on the front panel of the device support the auto-negotiation speed configuration feature. 

And ports on the extended interface card do not support this feature currently.  

z 

After you configure auto-negotiation speed(s) for a port, if you execute the undo speed command 

or the speed auto command, the auto-negotiation speed setting of the port restores to the default 

setting.  

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The effect of executing speed auto 10 100 1000 equals to that of executing speed auto, that is, 

the port is configured to support all the auto-negotiation speeds: 10 Mbps, 100 Mbps, and 1000 

Mbps.  

 

You can use the broadcast-suppression commands to restrict the broadcast traffic allowed to pass 

through a port. After that, if the broadcast traffic on the port exceeds the value you set, the system will 

maintain an appropriate broadcast traffic ratio by discarding the overflow traffic, so as to suppress 

broadcast storm, avoid network congestion and ensure normal network services. 

You can execute the broadcast-suppression command in system view or Ethernet port view: 

z 

If you execute the command in system view, the command takes effect on all ports. 

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If you execute the command in Ethernet port view, the command takes effect only on current port. 

Follow these steps to set the Ethernet port broadcast suppression ratio: 

Enter system view  

— 

Set the global broadcast 
suppression ratio 

broadcast-suppression 
{ ratio | pps max-pps } 

By default, the ratio is 100%, that is, 
the system does not suppress 
broadcast traffic globally. 

Enter Ethernet port view  

interface interface-type 
interface-number 

— 

Set the broadcast suppression 
ratio on current port 

broadcast-suppression 
{ ratio | pps max-pps } 

By default, the ratio is 100%, that is, 
the system does not suppress 
broadcast traffic on the port.  

 

After flow control is enabled on both the local and the peer devices, if congestion occurs on the local 

device, the device will inform its peer to suspend packet sending or lower the packet sending rate. In 

this way, packet loss is reduced and normal network services are guaranteed.  

Follow these steps to enable flow control on a port: