Influence Rstp Root Selection; Snmp Traps For Root Elections And Topology Changes - Dell Force10 C150 Configuration Manual

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
Figure 44-8. bridge-priority Command Example
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

SNMP Traps for Root Elections and Topology Changes

Enable SNMP traps for RSTP, MSTP, and PVST+ collectively using the command
traps xstp
908 | Rapid Spanning Tree Protocol
bridge-priority
command is used to make R2 the root bridge.
Old root bridge ID
.
Command Syntax
bridge-priority priority-value
Figure 44-8
New root bridge ID
Command Mode
PROTOCOL
SPANNING TREE
RSTP
shows the console
snmp-server enable