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Setting the speed on an interface on a 3550 Series Switch

Posted on 2008-06-23
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Last Modified: 2010-04-12
How do I set the Speed and Duplex on a 3550 Series Cisco Switch
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Question by:cdeons
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9 Comments
 
LVL 23

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that1guy15 earned 100 total points
ID: 21846917
Int g0/0
speed {10 | 100 | 1000 }
duplex {full | auto | half }

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Author Comment

by:cdeons
ID: 21848571
Thank you. How do I turn off auto negotation?
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LVL 23

Expert Comment

by:that1guy15
ID: 21848821
"no auto-negotiation" will disable auto negotiation on an interface.
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Author Comment

by:cdeons
ID: 21849043
"no auto-negotiation" doesn't seem to work on at 3550 switch. Any other ideals?
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LVL 23

Expert Comment

by:that1guy15
ID: 21849178
Is the port you are trying to disable auto-negotiation a trunk port? You can only disable  auto-negotiation on trunk ports.

To check do a show run and find the port you are working on. Under the port you should see a line that says "switch-port mode trunk".

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LVL 12

Expert Comment

by:jjmartineziii
ID: 21855559
If you mean auto negotiation of speed, setting "speed 100" disables that. If you mean auto negotation of a trunk, you can use the command "switchport nonegotiate"
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Author Comment

by:cdeons
ID: 21868545
I am sorry guys. When I say auto negotatio, I mean auto-MDIX
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LVL 12

Assisted Solution

by:jjmartineziii
jjmartineziii earned 100 total points
ID: 21868790
use command "no mdix auto"
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