Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 851

Verify that EdgePort is enabled on a port using the show spanning-tree rstp command from the EXEC privilege mode or the show config command from INTERFACE mode; Dell Force10 recommends using the show config command, as shown in the example below. FTOS Behavior: Regarding bpduguard shutdown-on-violation behavior: 1 If the interface to be shutdown is a port channel then all the member ports are disabled in the hardware. 2 When a physical port is added to a port channel already in error disable state, the new member port will also be disabled in the hardware. 3 When a physical port is removed from a port channel in error disable state, the error disabled state is cleared on this physical port (the physical port will be enabled in the hardware). 4 The reset linecard command does not clear the error disabled state of the port or the hardware disabled state. The interface continues to be disables in the hardware. The error disabled state can be cleared with any of the following methods: •Perform an shutdown command on the interface. •Disable the shutdown-on-violation command on the interface ( no spanning-tree stp-id portfast [bpduguard | [shutdown-on-violation]] ). •Disable spanning tree on the interface (no spanning-tree in INTERFACE mode). •Disabling global spanning tree (no spanning-tree in CONFIGURATION mode). FTOS(conf-if-gi-2/0)#show config ! interface GigabitEthernet 2/0 no ip address switchport spanning-tree rstp edge-port shutdown FTOS(conf-if-gi-2/0)# Influence RSTP Root Selection The Rapid Spanning Tree Protocol determines the root bridge, but you can assign one bridge a lower priority to increase the likelihood that it will be selected as the root bridge. To change the bridge priority, use the following command: Task Assign a number as the bridge priority or designate it as the primary or secondary root. priority-value range: 0 to 65535. The lower the number assigned, the more likely this bridge will become the root bridge. The default is 32768. Entries must be multiples of 4096. Command Syntax bridge-priority priority-value Command Mode PROTOCOL SPANNING TREE RSTP A console message appears when a new root bridge has been assigned. The following example shows the console message after the bridge-priority command is used to make R2 the root bridge. FTOS(conf-rstp)#bridge-priority 4096 04:27:59: %RPM0-P:RP2 %SPANMGR-5-STP_ROOT_CHANGE: RSTP root changed. My Bridge ID: 4096:0001.e80b.88bd Old Root: 32768:0001.e801.cbb4 New Root: 4096:0001.e80b.88bd Rapid Spanning Tree Protocol | 851