June 2007
Intermediate to advanced
600 pages
18h 19m
English
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Configuring Auto-Negotiation
For Cisco switches, auto-negotiation is enabled by default. You can configure the
speed and duplex mode manually with the speed and
duplex interface commands in IOS.
You cannot set the duplex mode without first setting the speed. The switch will complain if you attempt to do so:
2950(config-if)#duplex half
Duplex can not be set until speed is set to non-auto valueTo set the speed of the interface, use the speed
command. If the interface has previously been configured, you can return it to
auto-negotiation with the auto keyword:
2950(config-if)#speed ?
10 Force 10 Mbps operation
100 Force 100 Mbps operation
auto Enable AUTO speed configurationOnce you've set the speed, you can set the duplex mode to auto, full, or half:
2950(config-if)#duplex ?
auto Enable AUTO duplex configuration
full Force full duplex operation
half Force half-duplex operationBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.