How to configure multiple Cisco switch ports at the same time
Contributed by Headhunter 
Tagged: Cisco switch Using the following command will save you time when configuring multiple ports with the same characteristics.
To configure multiple switchports at the same time we use the interface range configuration command.
Example:
Switch(config)#interface range fastethernet0/1 – 20
Switch(config-if-range)#speed 100
Switch(config-if-range)#duplex full
The previous example will hardcode the speed and duplex settings on switchports 1 to 20. But this could well have been assinging them all to the same vlan.
We can even define multiple ranges.
Example
Switch(config)#interface range fastethernet0/1 – 4 , fastethernet0/10 – 15
Notice the spaces between the ranges.
The interface range command works with vlan, port-channel, fastethernet and gigabitethernet interfaces.
Doug Packer said on March 24, 2009
Excellent
Doug Packer
Pradeepkumar_15 said on November 11, 2010
is there any option avail for non-sequential ports like fa 0/1 fa 3/40 need to be changed to a same VLAN in single command
JWilliams said on January 7, 2011
Just use the same command as for multple ranges but only define to siungle ports.
We can even define multiple ranges.
Example
Switch(config)#interface range fastethernet0/1, fastethernet0/10
Soubbaya said on January 28, 2011
Good
Soubbaya said on January 28, 2011
did you see anything like this in real time environment
Jorjani Sor said on March 30, 2011
Thanks,Tecknical method.
Capesteve said on September 19, 2011
Re: We can even define multiple ranges. (on January 7, 2011)
For multiple non-contiguous ports I believe space is needed before and after comma
e.g.:
Switch(config)#interface range fa0/1 , fa0/10