Specifications

Command Line Interface
3-128
3
spanning-tree link-type
Use this command to configure the link type for Rapid Spanning Tree. Use the no
form to restore the default.
Syntax
spanning-tree link-type {auto | point-to-point | shared}
no spanning-tree link-type
• auto - Automatically derived from the duplex mode setting.
• point-to-point - Point-to-point link.
• shared - Shared medium.
Default Setting
auto
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• Specify a point-to-point link if the interface can only be connected to exactly
one other bridge, or a shared link if it can be connected to two or more bridges.
• When automatic detection is selected, the switch derives the link type from the
duplex mode. A full-duplex interface is considered a point-to-point link, while
a half-duplex interface is assumed to be on a shared link.
• RSTP only works on point-to-point links between two bridges. If you designate
a port as a shared link, RSTP is forbidden.
Example
spanning-tree protocol-migration
Use this command to re-check the appropriate BPDU format to send on the selected
interface.
Syntax
spanning-tree protocol-migration interface
interface
• ethernet unit/port
- unit - This is device 1.
- port - Port number.
• port-channel channel-id (Range: 1-6)
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree link-type point-to-point
Console(config-if)#