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7. Configure the spanning-tree attribute of port
8. Configure the snooping attribute of authentication key
9. Configure the FLUSH mode once topology changes
1. Enable MSTP and set the running mode
Command
Global Mode and Port Mode
spanning-tree
no spanning-tree
Global Mode
spanning-tree mode {mstp|stp|rstp}
no spanning-tree mode
Port Mode
spanning-tree mcheck
2. Configure instance parameters
Command
Global Mode
spanning-tree mst <instance-id> priority
<bridge-priority>
no spanning-tree mst <instance-id>
priority
spanning-tree priority <bridge-priority>
no spanning-tree priority
Port Mode
spanning-tree mst <instance-id> cost
<cost>
no spanning-tree mst <instance-id> cost
spanning-tree mst <instance-id>
port-priority <port-priority>
no spanning-tree mst <instance-id>
port-priority
spanning-tree mst <instance-id>
rootguard
no spanning-tree mst <instance-id>
rootguard
Explanation
Enable/Disable MSTP.
Set MSTP running mode.
Force port migrate to run under MSTP.
Explanation
Set bridge priority for specified instance.
Configure the spanning-tree priority of the
switch.
Set port path cost for specified instance.
Set port priority for specified instance.
Configure currently port whether running
rootguard in specified instance, configure
the rootguard port can't turn to root port.
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Troubleshooting
