Enabling Or Disabling Spanning Tree Operation - HP procurve 8100fl series Management And Configuration Manual

Syntax: spanning-tree priority < priority-multiplier >
This command sets the priority for the specified port(s) for the IST
(that is, Instance 0) of the region in which the switch resides. The
"priority" component of the port's "Port Identifier" is set. The Port
Identifier is a unique identifier that helps distinguish this switch's
ports from all others. It consists of the Priority value with the port
number extension—PRIORITY:PORT_NUMBER. A port with a lower
value of Port Identifier is more likely to be included in the active
topology.
This priority is compared with the priorities of other ports in the IST
to determine which port is the root port for the IST instance. The lower
the priority value, the higher the priority. The IST root port (or trunk)
in a region provides the path to connected regions for the traffic in
VLANs assigned to the region's IST instance.
The priority range for a port in a given MST instance is 0-240.
However, this command specifies the priority as a multiplier (0 - 15
) of 16. That is, when you specify a priority multiplier of 0 - 15, the
actual priority assigned to the switch is:
For example, configuring "5" as the priority multiplier on a given
port in the IST instance for a region creates an actual Priority setting
of 80. Thus, after you specify the port priority multiplier for the IST
instance, the switch displays the actual port priority (and not the
multiplier) in the show spanning-tree instance ist display. You can view
the actual multiplier setting for ports in the IST instance by executing
show running and looking for an entry in this format:
spanning-tree priority < priority-multiplier >
For example, configuring port gig5/2 with a priority multiplier of
"2" in the IST instance, results in this line in the show running output:
interface GigabitEthernet5/2
spanning-tree priority 2

Enabling or Disabling Spanning Tree Operation

This command is set on a per-port basis to enable or disable spanning tree
operation.
Syntax: [no] spanning-tree enable
This command enables/disables spanning tree for the designated
physical ports on the switch. Disabling MSTP removes protection
against redundant loops that can significantly slow or halt a network.
This command simply turns spanning tree on or off. It does not
change the existing spanning tree configuration.
(priority-multiplier) x 16
Spanning-Tree Operation
Configuring MSTP
9-27