lanadmin autosensing?

[Boonchu Ngampairoijpibu_1]

When I type the command lanadmin, I found the message like below:
# lanadmin -x 1
Current Speed = 100 Full-Duplex Auto-Negotiation-OFF

So, I'm quite not sure what is different the Auto-Negotiation-OFF from PCI 3COM autosensing feature.

Can I turn it on?

[James R. Ferguson]

Hi:

It is best to nail your switch for the speed you want and leave 'auto-negotiation' OFF. You're assured of getting what you want this way.

...JRF...

[Peter Van Sant]

By default 100bt lan cards use auto negotiation to set their speed and duplex.
If during boot an entry is found for the
card in the appropriate /etc/rc.config.d/
file that entry will overide auto negotiation.

When you do lanadmin -x you see Auto Negotiation Off if it found an entry,
otherwise you will just see whatever speed and duplex were negotiated with the switch.

For instance;

$ lanadmin -x 1
Current Speed = 100000000 Half-Duplex

Tells me auto negotiation was used.

[RAJESH GANGADHARAN]

it's best u have the same setting in both sitch and hp box
u can change it by
lanadmin -X AUTO_ON 1
this will reset the card and the new settings will take place
better don't make it ON , make changes in switch only

raj

[Darrell Allen]

Hello,

I don't know what it is with auto-negiotiation but I'd never assume it's going to work correctly. My experience is that it usually doesn't. I would always set the speed and duplex settings on both the server and the switch manually. There's not much worse than working an issue only to find the switch and server don't have the same settings.

Darrell

[Mark Seida]

We tried running with autosensing and everytime the switch would have a different setting for duplex than the workstation. If this is on a visualize workstation you will have to stop it at boot and do CO and then LC to check what the settings are for the card. We set all our workstations to LC 100/full_dx. That stopped all our frame size errors and we set the switches to 100 full.