iES20G/iES18G
Series User’s Manual
iS5 Communications Inc.
45
MSTP Setting
The following table describes the labels in this screen.
Label
Description
MSTP Enable
You must enable or disable MSTP function before configuring the
related parameters.
Force Version
The Force Version parameter can be used to force a VLAN Bridge that
supports RSTP to operate in an STP-compatible manner.
Configuration Name
The same MST Region must have the same MST configuration name.
Revision Level (0-65535)
The same MST Region must have the same revision level.
Priority (0-61440)
A value used to identify the root bridge. The bridge with the lowest
value has the highest priority and is selected as the root. If the value
changes, You must reboot the switch. The value must be a multiple of
4096 according to the protocol standard rule.
Max Age Time(6-40)
The number of seconds a bridge waits without receiving Spanning-tree
Protocol configuration messages before attempting a reconfiguration.
Enter a value between 6 and 40.
Hello Time (1-10)
This setting follows the rule below to configure the MAX Age, Hello
Time, and Forward Delay Time that a controlled switch sends out the
BPDU packet to check RSTP current status. Enter a value between 1
and 10.
2 x (Forward Delay Time value –1) ≥ Max Age value ≥ 2 x (Hello Time
value +1)
Forwarding Delay Time
The number of seconds a port waits before changing from its Rapid
