АМАТЕК AN-SGM28P24-400 [117/322] Default configuration 8 default configuration

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The minimum value of the root path in a switch is called the root port。

If multiple ports have the same minimum root path cost, the port with the highest

priority is the root port。If two or more ports have the same minimum root path cost

and the highest priority, the port with the smallest port number is the default root

port。

3）Designated switch for LAN

a、At first, all switches consider themselves to be the designated switches of LAN。

b、When the switch receives the BPDU sent by other switches in the same LAN (the

same) with a lower root path, the switch no longer claims that it is the designated

switch. If there are two or more switches with the same root path cost in a LAN, the

switches with the highest priority are selected as the designated switches。

c、If you specify a switch at a time one other LAN switch due to competition and sent to

the specified switch configuration BPDU, the specified switch will send a response

to the BPDU configuration, to re determine the designated switch。

4）Determining the specified port

The specified port in the specified switch of LAN is connected to the LAN port. If the

specified switch has two or more ports connected to the LAN, then the port with the

lowest identification port is the specified port。

In addition to the root port and the specified port, the other ports are blocked. In this way, the

topology of a spanning tree is determined after deciding the root switch of the root switch, the

switch, and the designated switch and designated port of each LAN。

8.2 MSTP configuration

8.2.1 Default configuration

Command parameter

Default value

spanning-tree mst enable(Start MSTP)

Spanning-tree mst priority(Switch CIST priority)

32768

spanning-tree mst hello-time(switch cist hello-time)

秒

spanning-tree mst forward-time(switch cist forward-time)

秒

spanning-tree mst max-age(switch cist max-age)

秒

spanning-tree mst max-hopsswitch cist max-hops)

秒

instance 1 priority (Instance priority)

32768