3Com 5500G-EI Command Reference Guide - Page 334

338 CHAPTER 10: USING RSTP COMMANDS undo stp timer max-age View System View Parameter centiseconds: Specifies the maximum age in centiseconds, ranging from 600 to 4000. By default, the value is 2000 centiseconds. Description Use the stp timer max-age command to configure the Max Age of the Switch. Use the undo stp timer max-age command to restore the default Max Age. Maximum age is used for judging if an RSTP packet is outdated. If the value is set too small, the spanning tree will be computed too frequently because the network congestion may be considered as a link failure. However, if the value is set too large, the link failure may not be discovered in time. Maximum age is related to the network "diameter", or complexity of the switched network. The default value, 2000, is recommended. Related commands: stp timer forward-delay, stp timer hello. Example To set the Max Age of the Switch to 1000 centiseconds, enter the following: system-view System View: return to User View with Ctrl+Z. [SW5500]stp timer max-age 1000 stp transmit-limit Syntax stp transmit-limit packetnum undo stp transmit-limit View Ethernet Port View Parameter packetnum: The maximum number of STP packets a port can send within one hello time. It ranges from 1 to 255 and defaults to 3. Description Use the stp transmit-limit command to set the maximum number of STP packets the current port can send within one hello time. Use the undo stp transmit-limit command to restore the default value. The larger the value of packetnum is, the larger the transmission rate is. However, more Switch resources will be used.