3com S7906E Guide De Référence

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port leaves the aggregation group. For detailed information about link aggregation, refer to Link 
Aggregation Configuration in the Access Volume.  
If a port directly connects to a user terminal rather than another device or a shared LAN segment, 
this port is regarded as an edge port. When the network topology changes, an edge port will not 
cause a temporary loop. Therefore, configuring a port as an edge port can enable the port to 
transition to the forwarding state rapidly. We recommend that you configure an Ethernet port 
directly connecting to a user terminal as an edge port to enable it to transition to the forwarding 
state rapidly.  
Normally, configuration BPDUs from other devices cannot reach an edge port because it does not 
connect to any other device. Before the BPDU guard function is enabled, if a port receives a 
configuration BPDU, the port is working actually as a non-edge port even if you have configured it 
as an edge port.  
Examples 
# Configure GigabitEthernet 2/0/1 as a non-edge port. 
<Sysname> system-view 
[Sysname] interface GigabitEthernet 2/0/1 
[Sysname-GigabitEthernet2/0/1] stp edged-port disable 
stp loop-protection 
Syntax 
stp loop-protection 
undo stp loop-protection 
View 
Ethernet port view, port group view, Layer-2 aggregate port view 
Default Level 
2: System level 
Parameters 
None 
Description 
Use the stp loop-protection command to enable the loop guard function on the port(s).  
Use the undo stp loop-protection command to restore the system default.  
By default, the loop guard function is disabled.  
Note that: 
Configured in port view, the setting takes effect on the current port only; configured in port group 
view, the setting takes effect on all ports in the port group.  
Configured in Layer-2 aggregate port view, the setting takes effect only on the aggregate port. 
Configured on the member port in an aggregation group, the setting can take effect only after the 
port leaves the aggregation group. For detailed information about link aggregation, refer to Link 
Aggregation Configuration in the Access Volume.