Connectivity Guide

Command Mode CONFIGURATION
Usage Information All STP instances stop in the previous STP mode, and restart in the new mode. You can also change to RSTP/MST
mode.
Example (RSTP)
OS10(config)# spanning-tree mode rstp
Example (MST)
OS10(config)# spanning-tree mode mst
Supported Releases 10.2.0E or later
spanning-tree port
Sets the port type as the EdgePort.
Syntax
spanning-tree port type edge
Parameters None
Default Not congured
Command Mode INTERFACE
Usage Information When you congure an EdgePort on a device running STP, the port immediately transitions to the Forwarding
state. Only congured ports connected to end hosts act as EdgePorts.
Example
OS10(config)# spanning-tree port type edge
Supported Releases 10.2.0E or later
spanning-tree vlan cost
Sets the path cost of the interface per VLAN for PVST calculations.
Syntax
spanning-tree vlan vlan-id cost {value}
Parameters value — Enter a port cost value to set the path cost of the interface for PVST calculations, from 1 to
200000000.
Defaults
• 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
Command Mode INTERFACE
Usage Information The media speed of a LAN interface determines the STP port path cost default value.
Example
OS10(conf-if-eth1/1/4)# spanning-tree vlan 10 cost 1000
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