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spanning-tree link-type
spanning-tree link-type
Use the spanning-tree link-type interface configuration command on the switch stack or on a
standalone switch to override the default link-type setting, which is determined by the duplex mode of
the interface, and to enable rapid spanning-tree transitions to the forwarding state. Use the no form of
this command to return to the default setting.
Syntax Description
point-to-point
shared
Defaults
The switch derives the link type of an interface from the duplex mode. A full-duplex interface is
considered a point-to-point link, and a half-duplex interface is considered a shared link.
Command Modes
Interface configuration
Command History
Release
12.2(40)EX1
Usage Guidelines
You can override the default setting of the link type by using the spanning-tree link-type command.
For example, a half-duplex link can be physically connected point-to-point to a single interface on a
remote switch running the Multiple Spanning Tree Protocol (MSTP) or the rapid per-VLAN
spanning-tree plus (rapid-PVST+) protocol and be enabled for rapid transitions.
Examples
This example shows how to specify the link type as shared (regardless of the duplex setting) and to
prevent rapid transitions to the forwarding state:
Switch(config-if)# spanning-tree link-type shared
You can verify your setting by entering the show spanning-tree mst interface interface-id or the show
spanning-tree interface interface-id privileged EXEC command.
Cisco Catalyst Blade Switch 3120 for HP Command Reference
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spanning-tree link-type {point-to-point | shared}
no spanning-tree link-type
Specify that the link type of an interface is point-to-point.
Specify that the link type of an interface is shared.
Modification
This command was introduced.
Chapter 2 Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands
OL-12248-03
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