3Com Switch 8800 Configuration Guide Chapter 38 MSTP Region-configuration38-13Setting the Timeout Factor of a Specific Bridgez Configuring the Max Transmission Speed on a Portz Configuring a Port as an Edge Port or Non-edge Portz Configuring the Path Cost of a Portz STP Path Cost Calculation Standards on STP portz Configuring the Priority of a Portz Configuring the Port (Not) to Connect with the Point-to-Point Linkz Configuring the mCheck Variable of a Portz Configuring the Switch Protection Functionz Enabling/Disabling MSTP on the Devicez Enable/Disable Address Table Reset on Specified Portz Enabling/Disabling MSTP on a PortOnly after MSTP is enabled on the device will other configurations take effect. Beforeenabling MSTP, you can configure the related parameters of the device and Ethernetports, which will take effect upon enabling MSTP and stay effective even after resettingMSTP. The check region-configuration command can display the region parametersthat have not yet taken effect. The display current-configuration command showsthe parameters configured before MSTP is enabled. For those configured after MSTPis enabled, you can use the related display commands. For detailed information, referto the “Display and Debug MSTP” section.Note:When GVRP and MSTP start on the switch simultaneously, GVRP packets willpropagate along CIST which is a spanning tree instance. In this case, if you want toissue a certain VLAN through GVRP on the network, you should make sure that theVLAN is mapped to CIST when configuring the VLAN mapping table of MSTP.CIST is spanning tree instance 0.38.2.1 Configuring the MST Region for a SwitchWhich MST region a switch belongs to is determined with the configurations of theregion name, VLAN mapping table, and MSTP revision level. You can perform thefollowing configurations to put a switch into an MST region.I. Entering MST region viewPerform the following configuration in system view.
