PLANET XGS3-24042 - Manual (Page 261)

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When the port is full-duplex, MSTP sets the port link type as point-to-point; When the port is
half-duplex, MSTP sets the port link type as shared.
Example:
Force the port 1/0/7-8 as point-to-point type.
Switch(config)#interface ethernet 1/0/7-8
Switch(Config-Port-Range)#spanning-tree link-type p2p force-true
14.1.15 spanning-tree maxage
Command:
spanning-tree maxage <time>
no spanning-tree maxage
Function:
Set the max aging time for BPDU; the command “no spanning-tree maxage” restores the default
setting.
Parameter:
<time> is max aging time in seconds. The valid range is from 6 to 40.
Command mode:
Global Mode
Default:
The max age is 20 seconds by default.
Usage Guide:
The lifetime of BPDU is called max age time. The max age is co working with hello time and forward
delay. The parameters should meet the following conditions. Otherwise, the MSTP may work
incorrectly.
2 * (Bridge_Forward_Delay - 1.0 seconds) >= Bridge_Max_Age
Bridge_Max_Age >= 2 * (Bridge_Hello_Time + 1.0 seconds)
Example:
In global mode, set max age time to 25 seconds.
Switch(config)#spanning-tree maxage 25
14.1.16 spanning-tree max-hop
Command:
spanning-tree max-hop <hop-count>
no spanning-tree max-hop