Change NIC setting to 100 to Auto

I would like to change the NIC settings from 100 to Auto, Auto_negotiation Yes without restarting the  Linux Machine.

bennisabrahamAsked:
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pablouruguayCommented:
the step2 is wrong i think..

change eth0 -s ethtool -s eth0 autoneg on for
ethtool -s eth0 autoneg on


and read the link that i posted before
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pablouruguayCommented:
you can do that with mii-tool

 mii-tool -F 100baseTx-HD

here you have an examples.
http://www.cyberciti.biz/faq/linux-change-the-speed-and-duplex-settings-of-an-ethernet-card/

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alextoftCommented:
or ethtool...

ethtool -s eth0 autoneg on
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bennisabrahamAuthor Commented:
What should I do with the /etc/modules.conf

Can I remove this line in module.conf
options eth0 line_speed=1000 auto_speed=0 full_duplex=1.
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pablouruguayCommented:
yes you need to remove this line to NOT_FORCE the nic to that this
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bennisabrahamAuthor Commented:
I want to be very specific, I am going to follow these steps

1. Removing  this line in /etc/modules.conf
    options eth0 line_speed=100 auto_speed=0 full_duplex=1.
2. eth0 -s ethtool -s eth0 autoneg on
3. Service network restart
4. chkconfig network on

 Will this work and can i change it to Gig Connection
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