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Configuring MSTP
Monitoring and Maintaining MSTP
Monitoring and Maintaining MSTP
8. spanning-tree mst instance-id port-priority
priority
Configures the port priority.
instance-id—Specifies a single instance, a range of
instances separated by a hyphen, or a series of
instances separated by a comma. The range is 0 to
4096.
priority—The range is 0 to 240 in increments of 16. The
default is 128. The lower the number, the higher the
priority.
The priority values are 0, 16, 32, 48, 64, 80, 96, 112,
128, 144, 160, 176, 192, 208, 224, and 240. All other
values are rejected.
9. spanning-tree mst instance-id cost cost Configures the cost.
If a loop occurs, the MSTP uses the path cost when selecting
an interface to place into the forwarding state. A lower path
cost represents higher-speed transmission.
instance-id—Specifies a single instance, a range of
instances separated by a hyphen, or a series of
instances separated by a comma. The range is 0 to
4096.
cost—The range is 1 to 200000000; the default value is
derived from the media speed of the interface.
10. spanning-tree link-type point-to-point Specifies that the link type of a port is point-to-point.
11. spanning-tree mst pre-standard Specifies that the port can send only prestandard BPDUs.
12. end Returns to privileged EXEC mode.
Command Purpose
Command Purpose
show spanning-tree mst configuration Displays the MST region configuration.
show spanning-tree mst configuration digest Displays the MD5 digest included in the current MSTCI.
show spanning-tree mst instance-id Displays MST information for the specified instance.
show spanning-tree mst interface interface-id Displays MST information for the specified interface.
clear spanning-tree detected-protocols Restarts the protocol migration process (forces the
renegotiation with neighboring switches) on the switch,
clear spanning-tree detected-protocols interface
interface-id
Restarts the protocol migration process on a specific
interface.
show running-config Verifies your entries.
copy running-config startup-config Saves your entries in the configuration file.