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• Disable spanning tree on the interface (the no spanning-tree command in INTERFACE mode).
• Disable global spanning tree (the no spanning-tree command in CONFIGURATION mode).
To enable EdgePort on an interface, use the following command.
• Enable EdgePort on an interface.
INTERFACE mode
spanning-tree rstp edge-port [bpduguard | shutdown-on-violation]
Example of Verifying an EdgePort is Enabled on an Interface
To verify that EdgePort is enabled on a port, use the show spanning-tree rstp command from EXEC privilege mode or the show
config command from INTERFACE mode.
NOTE: Dell Networking recommends using the show config command from INTERFACE mode.
In the following example, the bold line indicates that the interface is in EdgePort mode.
Dell(conf-if-Te-2/0)#show config
!
interface TenGigabitEthernet 2/0
no ip address
switchport
spanning-tree rstp edge-port
shutdown
Dell(conf-if-Te-2/0)#
Inuencing RSTP Root Selection
RSTP determines the root bridge, but you can assign one bridge a lower priority to increase the likelihood that it is selected as the root
bridge.
To change the bridge priority, use the following command.
• Assign a number as the bridge priority or designate it as the primary or secondary root.
PROTOCOL SPANNING TREE RSTP mode
bridge-priority priority-value
• priority-value The range is from 0 to 65535. The lower the number assigned, the more likely this bridge becomes the root
bridge.
The default is 32768. Entries must be multiples of 4096.
Example of the bridge-priority Command
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 (shown in bold).
Dell(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
Enabling SNMP Traps for Root Elections and Topology
Changes
To enable SNMP traps collectively, use this command.
Enable SNMP traps for RSTP, MSTP, and PVST+ collectively.
802
Rapid Spanning Tree Protocol (RSTP)