3Com 5500G-EI Command Reference Guide - Page 333

RSTP Configuration Commands 337 Use the undo stp timer forward-delay command 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: system-view System View: return to User View with Ctrl+Z. [SW5500]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 centisecond, 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. Related commands: stp timer forward-delay, stp timer max-age, stp transmit-limit. Example To set the hello time of the Switch to 300 centiseconds, enter the following: system-view System View: return to User View with Ctrl+Z. [SW5500]stp timer hello 300 stp timer max-age Syntax stp timer max-age centiseconds