3com S7906E 설치 설명서

 

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As for the internal loopback test and external loopback test, if a port is down, only the former is 

available on it; if the port is shut down, both are unavailable. 

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The speed, duplex, mdi, and shutdown commands are not applicable during loopback testing. 

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With the loopback testing enabled, the Ethernet port operates in full duplex mode. With the 

loopback testing disabled, the original configurations will be restored. 

 

The devices allow you to configure some functions on multiple ports at a time by assigning the ports to 

a port group in addition to configuring them on a per-port basis. This is helpful when you have to 

configure a feature in the same way on multiple ports.  

A port group is created manually and the settings you made on it apply to all group member ports. Note 

that even though the settings are made on the port group, they are saved on a port basis rather than on 

a port group basis. Thus, you can only view the settings in the view of each port with the display 

current-configuration command or the display this command.  

Follow these steps to configure a manual port group: 

Enter system view 

— 

Create a manual port group 
and enter manual port group 
view 

port-group manual 
port-group-name 

Required 

Add Ethernet ports to the 
manual port group 

group-member interface-list 

Required 

 

Usually, the transmission rate on an Ethernet port is determined through negotiation with the peer end, 

which can be any rate within the capacity range. With auto-negotiation rate configured, you can enable 

the Ethernet port to negotiate only part of the transmission rates within its capacity.