Influence Rstp Root Selection - Dell Force10 Z9000 Configuration Manual

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
3 When a physical port is removed from a port channel in error disable state, the error disabled state is
4 The reset linecard command does not clear the error disabled state of the port or the hardware disabled
Figure 38-7. EdgePort Enabled on Interface
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.
A console message appears when a new root bridge has been assigned.
message after the
| Rapid Spanning Tree Protocol (RSTP)
778
also be disabled in the hardware.
cleared on this physical port (the physical port will be enabled in the hardware).
state. The interface continues to be disables in the hardware.
The error disabled state can be cleared with any of the following methods:
shutdown
• Perform an
shutdown-on-violation
• Disable the
bpduguard | shutdown-on-violation
[ [
• Disable spanning tree on the interface (
• Disabling global spanning tree (
bridge-priority
command is used to make R2 the root bridge.
command on the interface.
command on the interface (
]] ).
no spanning-tree
no spanning-tree
in CONFIGURATION mode).
Indicates the interface is in EdgePort mode
Command Syntax
bridge-priority priority-value
no spanning-tree stp-id portfast
in INTERFACE mode).
Command Mode
PROTOCOL
SPANNING TREE
RSTP
Figure 38-8 shows the console