H3C S7500 Series Ethernet Switches Command Manual

Command Manual – MSTP
H3C S7500 Series Ethernet Switches Chapter 1
MSTP Configuration Commands
1-45
Examples
# Set the Max age to 1,000 centiseconds.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] stp timer max-age 1000
1.1.43 stp timer-factor
Syntax
stp timer-factor number
undo stp timer-factor
View
System view
Parameters
number: Hello time factor used to set the timeout time. This argument ranges from 1 to
10 and defaults to 3.
Description
Use the stp timer-factor command to set the timeout time of MSTP protocol packets
on a switch in the form of a multiple of the Hello time. For example, with the number
argument set to 3, the timeout time is three times of the Hello time.
Use the undo stp timer-factor command to revert to the default Hello time factor.
A switch regularly sends protocol packets to its neighboring devices at the interval
specified by the Hello time parameter to test the links. Normally, a switch regards its
upstream switch faulty if the former does receive any protocol packet from the latter in a
period three times of the Hello time and then initiates the spanning tree regeneration
process.
Spanning trees may be regenerated even in a steady network if an upstream switch
continues to be busy. You can configure the timeout time factor to a larger number to
avoid this problem. Normally, the timeout time can be four (or more) times of the Hello
time. For a steady network, the timeout time can be five to seven times of the Hello
time.
Examples
# Set the Hello time factor to 7.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] stp timer-factor 7