470 | Rapid Spanning Tree Protocol (RSTP)
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Figure 27-8. EdgePort Enabled on Interface
Influence RSTP Root Selection
The RSTP determines the root bridge, but you can assign one bridge a lower priority to increase the
likelihood so that it is selected as the root bridge.
To change the bridge priority, use the following command:
A console message appears when a new root bridge has been assigned. Figure 27-9 shows the console
message after you use the
bridge-priority command to make R2 the root bridge.
FTOS Behavior: Regarding bpduguard shutdown-on-violation behavior:
1 If the interface to be shutdown is a port channel, all the member ports are disabled in the hardware.
2 When a physical port is added to a port channel already in the Error Disable state, the new member port is
also disabled in the hardware.
3 When a physical port is removed from a port channel in the Error Disable state, the error disabled state is
cleared on this physical port (the physical port is enabled in the hardware).
4 You can clear the Error Disabled state 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 rstp edge-port
[bpduguard | [shutdown-on-violation]]).
•Disable spanning tree on the interface (no spanning-tree in INTERFACE mode).
5 Disabling global spanning tree (no spanning-tree in CONFIGURATION mode).
Task Command Syntax Command Mode
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.
bridge-priority priority-value
PROTOCOL
SPANNING TREE
RSTP
FTOS(conf-if-te-2/0)#show config
!
interface TenGigabitethernet 2/0
no ip address
switchport
spanning-tree rstp edge-port
shutdown
FTOS(conf-if-te-2/0)#
Indicates the interface is in EdgePort mode
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