Use the set spantree portfast command to allow a port that is connected to a single workstation or PC to start faster when it is connected.
set spantree portfast mod_num/port_num {enable | disable}
Syntax Description
mod_num Number of the module. port_num Number of the port on the module. enable Keyword that enables the spanning-tree port fast-start feature on the port. disable Keyword that disables the spanning-tree port fast-start feature on the port. Default
The default configuration has the port fast-start feature disabled.
Command Type
Switch command.
Command Mode
Privileged.
Usage Guideline
When a port configured with the spantree portfast enable command is connected, the port immediately enters the spanning-tree forwarding state rather than going through the normal spanning-tree states such as listening and learning. Use this command on ports that are connected to a single workstation or PC only; do not use it on ports that are connected to networking devices such as hubs, routers, switches, bridges, or concentrators.
Example
This example shows how to enable the spanning-tree port fast-start feature on port 2 on module 1:
Console> (enable) set spantree portfast 1/2 enable Warning: Spantree port fast start should only be enabled on ports connected to a single host. Connecting hubs, concentrators, switches, bridges, etc. to a fast start port can cause temporary spanning tree loops. Use with caution. Spantree port 1/2 fast start enabled. Console> (enable)Related Command
show spantree