topic Re: redhat EL4, NIC half-duplex to full-duplex in Operating System - Linux

redhat EL4, NIC half-duplex to full-duplex

ran_li — Tue, 14 Mar 2006 14:21:26 GMT

hello all,

I have a RHEL 4, the eth0 is set to

#mii-tool
eth0: no autonegotiation, 100baseTx-HD, link ok

need to set it to 100beaseTX-FD,
#mii-tool -F 100baseTx-FD eth0

however, it could not be set on the fly, while I did the same to another Redhat host, it works fine.

Is there any other way to set the eth0 to full-duplex on the fly?

Regards!

Re: redhat EL4, NIC half-duplex to full-duplex

Ivan Ferreira — Tue, 14 Mar 2006 14:31:31 GMT

mii-tool is deprecated now, use ethtool instead.

Re: redhat EL4, NIC half-duplex to full-duplex

Steven E. Protter — Tue, 14 Mar 2006 14:32:58 GMT

Shalom,

yes, use ethtool

RH 4 autonegotiates rather well and I'd be concerned about this issue. I'd check my network switch configuration off the server. More than likely something is wrong.

SEP

Re: redhat EL4, NIC half-duplex to full-duplex

Ivan Ferreira — Tue, 14 Mar 2006 14:37:32 GMT

See also:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1005380

For making the changes permanent.

Re: redhat EL4, NIC half-duplex to full-duplex

ran_li — Tue, 14 Mar 2006 14:52:54 GMT

thanks guys!

tried below and it works!
# ethtool -s eth0 speed 100 duplex full autoneg off

however, must use "autoneg off" otherwise won't be able to switch on the fly.

Regards!