changing to full duplex requires reboot?

[James Ellis_1]

I am not sure if changing from half duplex to full duplex will require a reboot? I think rebooting is required to change the duplex mode. Thanks.

[Rita C Workman · Accepted solution]

I don't believe so.
You should be able to enter
lanadmin -X 100FD

The above w/change it to 100 full duplex. Use nmid or ppa depending on which platform your on.
To make permanent these changes, just make the entries in your /etc/rc.config.d/. See the following thread for some help on this:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xbc3eec08252fd611abd50090277a778c,00.html

Rgrds,
Rita

[Rita C Workman]

Hi James,

Forgot to mention...make sure your auto-negotiation is OFF. And always make sure the port switch is set the same. I have gotten burned by switches that got reset to half duplex with auto on. - so whenever you see your network having trouble always make sure both ends are set the same.

Rgrds,
Rita

....all done now...

[Uday_S_Ankolekar]

NO..

But kame sure you have changed the settings in proper files so it could take effect during next reboot.

look for file in /etc/rc.config.d/hp*

lanadmin -X speed nmid to change it on the fly

ex lanadmin -X 100FD 2

-USA..

[nancy rippey]

No a reboot is not required. I actually changed to full duplex on a production server this morning - no problems.

[Sandip Ghosh]

No, it does not need any reboot. For temporary you have to do through lanadmin and to do it permanently you have to edit the correspoding file to your network card under /etc/rc.config.d directory like hpbase100conf etc.

Sandip

[Darrell Allen]

Hi James,

Usually you'll be fine to use lanadmin -X "on the fly". However, I have had lanadmin hang before when the switch port was still configured to autoneg.

I've never had a problem changing from 100HD to 100FD on the server if the switch was already forced to 100FD (not autoneg).

Darrell

[Roger Baptiste]

Hi,

I have done this many times, never needed a reboot. Can be done on the fly. Make sure you get the settings right and also note that there will be a small moment (couple of minutes), when the network connection on the port will freeze while the change is on.
That's why if you have another lan port on the system, you can login through that port and issue the command. Not a big deal, but helps.

HTH
raj

[Sanjay_6]

Hi James,

You can do the change through SAM and the change will be recorded in the configuration file and sam will restart the network. So you don't need a reboot. If you use lanadmin to make the change, you'll have to edit the corresponding configuration file manually. If you don't do so, the change will be lost on a reboot. Lanadmin changes are temporary and are lost on reboot.

So i would suggest, you try to make the change using SAM, this will modify the required configuration file and you won't have to edit anything manually.

Hope this helps.

Regds

[James Ellis_1]

I changed to full duplex and it seem to be working. I did it through SAM. I noticed that SAM automatically updated /etc/rc.config.d/hpbase100conf.

One other thing, I am using an ethernet card, and I noticed in /etc/rc.config.d there was a file called hpetherconf. Do I need to update this also? I don't think so.

Thanks.

[Michael Tully]

Hi,

No. The only file that needs updating in this
instance is the /etc/rc.config.d/hpbase100conf
file.

-Michael