Influence Rstp Root Selection - Dell Force10 S4810P Configuration Manual

FTOS Behavior: Regarding
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
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).
Figure 42-7. 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.
range: 0 to 65535. The lower the number
priority-value
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
874
| Rapid Spanning Tree Protocol (RSTP)
bpduguard shutdown-on-violation
command does not clear the error disabled state of the port or the hardware disabled state. The interface
command is used to make R2 the root bridge.
bridge-priority
behavior:
Indicates the interface is in EdgePort mode
Command Syntax
bridge-priority priority-value
Figure 42-8
Command Mode
PROTOCOL
SPANNING TREE
RSTP
shows the console