Command Manual (For Soliton) – MSTP
H3C S3100 Series Ethernet Switches
Chapter 1 MSTP Configuration Commands
1-58
The max age is meaningless to MSTIs. The max age configured for the root bridge of
the CIST applies to all switches operating on the CIST, including the root bridge.
As for the configuration of the three time-related parameters (namely, the hello time,
forward delay, and max age parameters), the following formulas must be met to prevent
frequent network jitter:
2 × (forward delay – 1 second) >= max age,
Max age >= 2 × (hello time + 1 second).
You are recommended to specify the network diameter of the switched network and the
hello time parameter by using the
stp root primary
or
stp root secondary
command.
After that, the three proper time-related parameters are automatically determined by
MSTP.
Related commands:
stp timer forward-delay,
stp timer hello,
stp bridge-diameter
.
Examples
# Set the max age to 1,000 centiseconds.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] stp timer max-age 1000
1.1.53 stp timer-factor
Syntax
stp timer-factor number
undo
stp timer-factor
View
System view
Parameters
number
: Hello time factor to be set, in the range of 1 to 10.
Description
Use the
stp timer-factor
command to set the timeout time of a switch in the form of a
multiple of the hello time.
Use the
undo stp timer-factor
command to restore the hello time factor to the default
value.
By default, the hello time factor of the switch is 3.
A switch regularly sends protocol packets to its neighboring devices at the interval
specified by the hello time parameter to test the links. Generally, a switch regards its
upstream switch faulty if the former does receive any protocol packets from the latter in
