TP-Link T1500-28PCT TL-SL2428P T1500-28PCT V1 CLI Reference Guide - Page 145

spanning-tree common-config, Example, Description, Syntax, Parameter

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Example Enable the STP function for port 2: T1500-28PCT(config)# interface fastEthernet 1/0/2 T1500-28PCT(config-if)# spanning-tree spanning-tree common-config Description 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. Syntax 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 Parameter 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. 134

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134
Example
Enable the STP function for port 2:
T1500-28PCT(config)#
interface fastEthernet
1/0/2
T1500-28PCT(config-if)# spanning-tree
spanning-tree common-config
Description
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.
Syntax
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
Parameter
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.