TP-LINK TL-SG2452 Data Sheet

 

118

 

The  spanning-tree common-config command is used to configure the 

parameters of the ports for comparison in the CIST and the common parameters 

of all instances. To return to the default configuration, please use no 

spanning-tree common-config command. CIST (Common and Internal 

Spanning Tree) is the spanning tree in a switched network, connecting all 

devices in the network. 

spanning-tree common-config [ port-priority  pri  ] [ ext-cost  ext-cost  ] 

[ int-cost int-cost ] [ portfast { enable | disable }] [ point-to-point { auto | open | 

close }] 

no spanning-tree common-config 

pri  ——  Port Priority, which must be multiple of 16 ranging from 0 to 240. By 

default, the port priority is 128. Port Priority is an important criterion on 

determining if the port connected to this port will be chosen as the root port. In 

the same condition, the port with the highest priority will be chosen as the root 

port. The lower value has the higher priority. 

ext-cost  —— External Path Cost, which is used to choose the path and 

calculate the path costs of ports in different MST regions. It is an important 

criterion on determining the root port. The lower value has the higher priority. It 

ranges from o to 2000000. By default, it is 0 which is mean auto. 

int-cost  ——  Internal Path Cost, which is used to choose the path and calculate 

the path costs of ports in an MST region. It is an important criterion on 

determining the root port. The lower value has the higher priority. By default, it is 

automatic. It ranges from o to 2000000. By default, it is 0 which is mean auto. 

portfast  —— Enable/ Disable Edge Port. By default, it is disabled. The edge 

port can transit its state from blocking to forwarding rapidly without waiting for 

forward delay. 

point-to-point  ——  The P2P link status, with auto, open and close options. By 

default, the option is auto. If the two ports in the P2P link are root port or 

designated port, they can transit their states to forwarding rapidly to reduce the 

unnecessary forward delay.