Command Manual – Port Basic Configuration 
Quidway S3900 Series Ethernet Switches-Release 1510 
Chapter 1  Port Basic Configuration
Commands
 
Huawei Technologies Proprietary 
1-14 
[Quidway-Ethernet1/0/1] duplex auto 
1.1.12  flow-control 
Syntax 
flow-control 
undo flow-control 
View 
Ethernet port view 
Parameter 
None 
Description 
Use the flow-control command to enable flow control on the current Ethernet port.  
Use the undo flow-control command to disable flow control on the port.  
Suppose flow control is enabled on both the local and peer switches. When congestion 
occurs on the local switch,  
z  the local switch sends a message to notify the peer switch of stopping sending 
packets to itself temporarily,  
z  the peer switch will stop sending packets to the local switch temporarily when it 
receives the message; and vice versa. By this way, packet loss is avoided and the 
network service operates normally. 
By default, flow control is disabled on a port.  
Example 
# Enable flow control on the Ethernet1/0/1 port.  
<Quidway> system-view 
System View: return to User View with Ctrl+Z. 
[Quidway] interface ethernet 1/0/1 
[Quidway-Ethernet1/0/1] flow-control 
[Quidway-Ethernet1/0/1] 
1.1.13  flow interval 
Syntax 
flow-interval interval 
undo flow-interval