lanadmin

[Uday_S_Ankolekar]

I've two servers back-to-back connected with 100 mbps full duplex speed.
When server boots the speed falls to half duplex. Why and How Do I resolve it??

[Peggy Fong]

If you do a search on "full duplex" among other key words in the forum you will find more info on your problem. One thing I found was that you might need to configure a file to maintain your settings across boots. Try looking at /etc/rc.config.d/hpbase100conf.

lanadmin MODE [ppa|nmid]
where MODE = 100FD
and you get your ppa or nmid from your lanscan for the card will allow you to change this on the fly (sorry if you already knew that).

Peggy

[James R. Ferguson]

Hi:

I'd suggest that you explicitly set the speed and mode in the appropriate /etc/rc.config.d/ "conf" file.

For example, if your lan card's driver is 'btlan1' as seen in an ioscan (ioscan -fnk -C lan), then set:

# HP_BASET_SPEED=100FD

in /etc/rc.config.d/hpbasetconf

For a mapping of configuration files and card types see this:

http://techsolutions.hp.com/fe/configs.html#config_files

...JRF...

[MANOJ SRIVASTAVA]

Hi Uday

Do a lanscan to identify the card , the add it to /etc/rc.config.d.hpbase100conf , and then stop and start the net services from /sbin/init.d/net file.

Manoj Srivastava

[rick jones · Accepted solution]

the specs for 100BT state that if autoneg "fails" the nic should go into half-duplex operation.

if one side is hard-coded to a duplex setting - say full-duplex, and the other side is set to auto-negotiate, auto-neg will fail and the auto-neg side will go half-duplex.

so, make sure that both sides of a link are set the same way - either both auto, both half, or both full.

and i suppose it would not hurt to be on the latest patches for your driver(s) :)

[Uday_S_Ankolekar]

Hi,
Thanks folks.. That helped me a lot. You won your points.!