S
PANNING
T
REE
C
OMMANDS
4-197
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.
Example
Related Commands
spanning-tree edge-port (4 -196)
Console(config)#interface ethernet 1/5
Console(config-if)#Spanning-tree portfast
Console(config-if)#
Summary of Contents for 8728L2 - annexe 1
Page 2: ......
Page 15: ...CONTENTS xi ...
Page 19: ...TABLES xv ...
Page 32: ...INTRODUCTION 1 10 ...
Page 46: ...INITIAL CONFIGURATION 2 14 ...
Page 177: ...PORT CONFIGURATION 3 131 Figure 3 59 Displaying Etherlike and RMON Statistics ...
Page 258: ...CONFIGURING THE SWITCH 3 212 ...
Page 524: ...COMMAND LINE INTERFACE 4 266 ...
Page 532: ...TROUBLESHOOTING B 4 ...
Page 545: ......