3Com 4500 50-PORT, 4500 PWR 50-PORT Stp timeout-factor Syntax, Stp timer forward-delay Syntax

228CHAPTER 10: USING RSTP COMMANDS

not forward any packets (as if the link to it is disconnected). It will resume normal status if it receives no BPDU with higher-priority for a period of time.

Example

To enable Root protection function on Ethernet1/0/1 of the Switch, enter the following:

<4500>system-view

System View: return to User View with Ctrl+Z.

[4500]interface Ethernet1/0/1

[4500-Ethernet1/0/1]stproot-protection

stp timeout-factor Syntax

stp timeout-factor number

undo stp timeout-factor

View

System View

Parameter

number: Specifies the multiple of hello time, ranging from 3 to 7.

Description

Use the stp timeout-factorcommand to configure the multiple of hello time for the Switch.

Use the undo stp timeout-factorcommand to restore the default multiple value.

By default, the multiple is 3.

The Ethernet Switch transmits RSTP packets every hello time seconds. By default, if the Switch does not receive RSTP packets from the upstream Switch for 3 x hello time seconds, the Switch will decide the upstream Switch is dead and will recalculate the topology of the network. In a congested network, a system administrator may want to increase the timeout interval to prevent an unnecessary network topology change. This can be accomplished by using the timeout-factor command to set the multiplier to the desired value. The higher the multiplier the greater the timeout interval. It is recommended to set 5, 6 or 7 as the value of multiple in the steady network.

Example

To set the multiple value of hello time to 7, enter the following:

<4500>system-view

System View: return to User View with Ctrl+Z.

[4500]stp timeout-factor 7

stp timer forward-delay Syntax

stp timer forward-delay centiseconds