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“force-true”  specifies  ports  as  edge  ports.  The  edge  ports 
connect  directly  to  terminal,  affecting  no  network‟s 
connectivity,  thus  getting  quickly  into  Forwarding  status. 
When edge ports  receiving configuration message (BPDU 
Message), the system will automatically set these ports as 
non-edge  ports  and  calculate  spanning  tree,  causing 
network‟s topology oscillation. 
Force-true: it represents point to point sharing link. Point to 
point port is similar to edge port, but point to point mode 
must be full duplex mode. As the edge port, point to point 
port can quickly turn into forwarding status to obtain RSTP 
advantages. 
Force-false: it represents this interface does not own point to 
point status. 
auto:  it  represents  that  interface  will  change  into  point  to 
point status whenever it is possible, like status of point to 
point  is  “force-true”.  If  the  interface  can  not  maintain  this 
status,(like interface is forced operating half duplex mode), 
the point to point status will be changed, like status of point 
to  point  is  “force-false”.  This  parameter  default  is  set  as 
“auto”.