Configuring The Mstp Time-Related Parameters - H3C S3100 8C SI Operation Manual

Operation Manual – MSTP
H3C S3100 Series Ethernet Switches
The network diameter parameter indicates the size of a network. The bigger the
network diameter is, the larger the network size is.
After you configure the network diameter of a switched network, an MSTP-enabled
switch adjusts its hello time, forward delay, and max age settings accordingly to better
values.
The network diameter setting only applies to CIST; it is invalid for MSTIs.
II. Configuration example
# Configure the network diameter of the switched network to 6.
<Sysname> system-view
[Sysname] stp bridge-diameter 6

1.3.9 Configuring the MSTP Time-related Parameters

Three MSTP time-related parameters exist: forward delay, hello time, and max age.
You can configure the three parameters to control the process of spanning tree
calculation.
I. Configuration procedure
Table 1-17 Configure MSTP time-related parameters
Operation
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.
Command
system-view
stp timer
forward-delay
centiseconds
stp timer hello
centiseconds
stp timer max-age
centiseconds
1-28
Chapter 1 MSTP Configuration
Description
—
Required
The forward delay parameter
defaults to 1,500 centiseconds
(namely, 15 seconds).
Required
The hello time parameter defaults to
200 centiseconds (namely, 2
seconds).
Required
The max age parameter defaults to
2,000 centiseconds (namely, 20
seconds).