3Com 4500 26-PORT, 4500 PWR 50-PORT manual Stp timer hello Syntax, Undo stp timer forward-delay

RSTP Configuration Commands 229

undo stp timer forward-delay

View

System View

Parameter

centiseconds: Specifies the time of forward delay in centiseconds, ranging from 400 to 3000. By default, the value is 1500 centiseconds.

Description

Use the stp timer forward-delaycommand to configure the time of forward delay for the Switch.

Use the undo stp timer forward-delaycommand to restore the default forward delay time.

The value of forward delay is related to the “diameter” of the switching network. The more extensive the switching network is, the longer the forward delay should be set. You can use this command to modify the value of forward delay. The default value, 1500, is recommended.

Related commands: stp timer hello, stp timer max-age.

Example

To set the forward delay of the device to 2000 centiseconds, enter the following:

<4500>system-view

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

[4500]stp timer forward-delay 2000

stp timer hello Syntax

stp timer hello centiseconds

undo stp timer hello

View

System View

Parameter

centiseconds: Specifies the value of hello time in centiseconds, ranging from 100 to 1000. By default, the value is 200 centiseconds.

Description

Use the stp timer hello command to configure hello time of the Switch.

Use the undo stp timer hello command to restore the default hello time.

The Ethernet Switch transmits RSTP packets every hello time seconds. A longer hello time can ease the CPU load of the Switch, but it will also affect the performances of RSTP in how rapidly it responds to changes. The stp timer hello command can be used to modify the value of hello time. The default value is recommended.