Installation manual

4-230
SIGNAMAX LLC • www.signamax.eu
forwarding loops, they can pass directly through to the spanning tree forwarding
state. Specifying Edge Ports provides quicker convergence for devices such as
workstations or servers, retains the current forwarding database to reduce the
amount of frame flooding required to rebuild address tables during reconfiguration
events, does not cause the spanning tree to initiate reconfiguration when the
interface changes state, and also overcomes other STA-related timeout problems.
However, remember that Edge Port should only be enabled for ports connected to
an end-node device.
• This command has the same effect as the spanning-tree portfast.
Example
Related Commands
spanning-tree portfast (4-230)
spanning-tree portfast
This command sets an interface to fast forwarding. Use the no form to disable fast
forwarding.
Syntax
[no] spanning-tree portfast
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• This command is used to enable/disable the fast spanning-tree mode for the
selected port. In this mode, ports skip the Discarding and Learning states, and
proceed straight to Forwarding.
• Since end-nodes cannot cause forwarding loops, they can be passed through the
spanning tree state changes more quickly than allowed by standard convergence
time. Fast forwarding can achieve quicker convergence for end-node workstations
and servers, and also overcome other STA related timeout problems. (Remember
that fast forwarding should only be enabled for ports connected to a LAN segment
that is at the end of a bridged LAN or for an end-node device.)
• This command is the same as spanning-tree edge-port, and is only included for
backward compatibility with earlier products. Note that this command may be
removed for future software versions.
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree edge-port
Console(config-if)#