3com WX3000 Manuel D’Utilisation

 

1-23 

Enter system view 

— 

Configure the network diameter 
of the switched network 

 

 

Required 
The default network diameter of 
a network is 7. 

 

The network diameter parameter indicates the size of a network. The bigger the network diameter is, 
the larger the network size is. 

After you configure the network diameter of a switched network, an MSTP-enabled device adjusts its 
hello time, forward delay, and max age settings accordingly to better values. 

The network diameter setting only applies to CIST; it is invalid for MSTIs. 

# Configure the network diameter of the switched network to 6. 

<device> system-view 

[device] stp bridge-diameter 6 

Three MSTP time-related parameters exist: forward delay, hello time, and max age. You can configure 
the three parameters to control the process of spanning tree calculation. 

Follow these steps to configure MSTP time-related parameters: 

Enter system view 

— 

Configure the forward 
delay parameter 

 

 

Required 
The forward delay parameter defaults to 
1,500 centiseconds (namely, 15 
seconds). 

Configure the hello time 
parameter 

 

 

Required 
The hello time parameter defaults to 200 
centiseconds (namely, 2 seconds). 

Configure the max age 
parameter 

 

 

Required 
The max age parameter defaults to 2,000 
centiseconds (namely, 20 seconds). 

 

All devices in a switched network adopt the three time-related parameters configured on the CIST root 
bridge.