NOTE: With large configurations (especially those configurations with more ports) Dell Networking recommendsincreasing the hello-time.The range is from 1 to 10.The default is 2 seconds.3 Change the max-age parameter.PROTOCOL MSTP modemax-age secondsThe range is from 6 to 40.The default is 20 seconds.4 Change the max-hops parameter.PROTOCOL MSTP modemax-hops numberThe range is from 1 to 40.The default is 20.Example of the forward-delay ParameterTo view the current values for MSTP parameters, use the show running-config spanning-tree mstp command from EXECprivilege mode.Dell(conf-mstp)#forward-delay 16Dell(conf-mstp)#exitDell(conf)#do show running-config spanning-tree mstp!protocol spanning-tree mstpno disablename my-mstp-regionMSTI 1 VLAN 100MSTI 2 VLAN 200-300forward-delay 16MSTI 2 bridge-priority 4096Dell(conf)#Modifying the Interface ParametersYou can adjust two interface parameters to increase or decrease the probability that a port becomes a forwarding port.• Port cost is a value that is based on the interface type. The greater the port cost, the less likely the port is selected to be a forwardingport.• Port priority influences the likelihood that a port is selected to be a forwarding port in case that several ports have the same port cost.The following lists the default values for port cost by interface.Table 61. Default Values for Port Costs by InterfacePort Cost Default Value100-Mb/s Ethernet interfaces 2000001-Gigabit Ethernet interfaces 2000010-Gigabit Ethernet interfaces 2000584 Multiple Spanning Tree Protocol (MSTP)
