H3C S7500 Series Operation Manual page 260

Operation Manual – MSTP
H3C S7500 Series Ethernet Switches
period ensures that the newly generated configuration BPDUs can be propagated
across the entire network.
The Hello time parameter is for link failure detecting.
A switch regularly sends hello packets to other switches at the interval specified by the
Hello time parameter to detect the link failures.
The Max age parameter is used to judge whether or not a configuration BPDU is
obsolete. Obsolete configuration BPDUs will be discarded.
I. Configuration procedure
Follow these steps to configure MSTP time-related parameters:
To do ...
Enter system view
Configure the
Forward delay
parameter
Configure the Hello
time parameter
Configure the Max
age parameter
All switches in a switched network adopt the three time-related parameters configured
on the CIST root bridge.
Use the command ...
system-view
stp timer forward-delay
centiseconds
stp timer hello
centiseconds
stp timer max-age
centiseconds
1-16
Chapter 1 MSTP Configuration
Remarks
—
Required
The Forward delay parameter
defaults to 1,500 centiseconds
(15 seconds).
Required
The Hello time parameter
defaults to 200 centiseconds (2
seconds).
Required
The Max age parameter defaults
to 2,000 centiseconds (20
seconds).