Reference Guide

Example
OS10(config)# spanning-tree mst 0 priority 0
OS10(config)# spanning-tree mst 2 root primary
Supported Releases 10.2.0E or later
spanning-tree mst force-version
Congures a forced version of STP to transmit BPDUs.
Syntax
spanning-tree mst force-version {stp | rstp}
Parameters
• stp — Forces the version for the BPDUs transmitted by MST to STP.
• rstp — Forces the version for the BPDUs transmitted by MST to RSTP.
Default Not congured
Command Mode CONFIGURATION
Usage Information Forces a bridge that supports MST to operate in a STP-compatible mode.
Example
OS10(config)# spanning-tree mst force-version
Supported Releases 10.2.0E or later
spanning-tree msti
Congures the MSTI, cost, and priority values for an interface.
Syntax
spanning-tree msti instance {cost cost | priority value}
Parameters
• msti instance — Enter the MST instance number (0 to 63).
• cost cost — (Optional) Enter a port cost value (1 to 200000000). Default values:
• 100 Mb/s Ethernet interface = 200000
• 1-Gigabit Ethernet interface = 20000
• 10-Gigabit Ethernet interface = 2000
• Port-channel interface with one 100 Mb/s Ethernet = 200000
• Port-channel interface with one 1 Gigabit Ethernet = 20000
• Port-channel interface with one 10 Gigabit Ethernet = 2000
• Port-channel with two 1 Gigabit Ethernet = 18000
• Port-channel with two 10 Gigabit Ethernet = 1800
• Port-channel with two 100 Mbps Ethernet = 180000
• priority value — Enter a value in increments of 16 as the priority (0 to 240, default 128) .
Default Priority value is 128
Command Mode INTERFACE
Usage Information The cost is a value based on the interface type. The greater the cost value, the less likely the port is selected to
be a forwarding port. The priority inuences the likelihood that a port is selected to be a forwarding port if
several ports have the same cost.
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