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Command Usage
• You can enable this option if an interface is attached to a LAN segment that
is at the end of a bridged LAN or to an end node. Since end nodes cannot
cause 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
Console(config)#interface ethernet ethernet 1/5
Console(config-if)#spanning-tree edge-port
Console(config-if)#
Related Commands
spanning-tree portfast (33-14)
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.)
33-14
Spanning Tree Commands
33