Switch User Manual

268 Spanning-Tree Commands
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User Guidelines
• This feature should be used only with interfaces connected to end stations. Otherwise, an
accidental topology loop could cause a data packet loop and disrupt switch and network
operations.
Example
The following example enables PortFast on g5 .
spanning-tree link-type
The spanning-tree link-type Interface Configuration mode command overrides the default link-
type setting. To reset the default, use the
no form of this command.
Syntax
spanning-tree link-type { point-to-point | shared }
no spanning-tree spanning-tree link-type
• point-to-point —Specifies the port link type as point-to-point.
•
shared —Specifies that the port link type is shared.
Default Configuration
There is no default configuration for this command.
Command Modes
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
• The switch derives the link type of a port from the duplex mode. A full-duplex port is
considered a point-to-point link, and a half-duplex port is considered a shared link.
Example
The following example enables shared spanning-tree on g5 .
Console(config)# interface ethernet g5
Console(config-if)# spanning-tree portfast
Console(config)# interface ethernet g5
Console(config-if)# spanning-tree link-type shared