Command Usage
• You can enable this option if an interface is attached to a LAN seg ment that
is at the end of a bridged LAN or to an end node. Since end no des cannot
cause forwarding loops, they can pass directly throu gh to the spanning tre e
forwarding state. Specifying Edge Ports provides quicker convergence for
devices such as workstations or servers, reta ins the current for warding
database to reduce the amount of frame flooding required to rebuild ad dress
tables during reconfiguration events, does not cau se the spa nning 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 con necte d to an en d-node de vice.
• This command has the same eff ect 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 use d to ena ble/disa ble th e fast spa nning- tree mod e 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 a llowed by st andard
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 L AN or for
an end-node device.)
33-14
Spanning Tree Commands
33