3com 5500-ei pwr Installation Instruction

 

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You can configure an auto-negotiation speed for a port by using the speed auto command.  

Take a 10/100/1000 Mbps port as an example. 

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If you expect that 10 Mbps is the only available auto-negotiation speed of the port, you just need to 

configure speed auto 10.  

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If you expect that 10 Mbps and 100 Mbps are the available auto-negotiation speeds of the port, you 

just need to configure speed auto 10 100.  

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If you expect that 10 Mbps and 1000 Mbps are the available auto-negotiation speeds of the port, 

you just need to configure speed auto 10 1000.  

Follow these steps to configure auto-negotiation speeds for a port: 

Enter system view 

— 

Enter Ethernet interface 
view 

interface interface-type 
interface-number 

— 

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

speed auto [ 10 | 100 | 
1000 ]* 

Optional 

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By default, the port speed is 
determined through 
auto-negotiation. 

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Use the 1000 keyword for Gigabit 
Ethernet ports only. 

 

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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.  

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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.  

 

By performing the following configurations, you can limit the incoming broadcast/multicast/unknown 

unicast traffic on individual ports. When a type of incoming traffic exceeds the threshold you set, the 

system drops the packets exceeding the traffic limit to reduce the traffic ratio of this type to the 

reasonable range, so as to keep normal network service. 

Follow these steps to limit traffic on port: 

Enter system view 

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