Re: Bad auto-negotiate on network adapter ...

Just for the record, this media speed issue is somehow related to the
version of AIX used. I had a 5.2 system with multiple 10/100 NICs to similar
switches, all set to 100Mbps/Full Duplex fixed at both ends. After upgrading
AIX to 5.3 all NICs had to be set to Auto (with the switches still set to
100Mbps/FD) to function correctly. No hardware changes during the upgrade
whatsoever.

Regards,
Zoltán

On 4/13/06, Sandor W. Sklar <ssklar@xxxxxxxxxxxx> wrote:

Right ... thanks everyone. Due to internal "history", most of our
switches are all set to Auto. I wound up migrating the IP address
and aliases from this adapter to a different one in the system (one
that was GigE on a GigE switch), rmtcpip'd and mktcpip'd, and
rebooted the system, and now I'm in full-duplex gigabit happiness. :-)

-s-

On Apr 13, 2006, at 3:55 AM, Green, Simon wrote:

For 10/100 Ethernet switches it's generally recommended to force the
connection to what you want at both ends.

GbEth has to be set to Auto. On our newer 10/100/1000 switches the
connection also has to be set to Auto at both ends, even if the NIC
is a
10/100.

There's an IBM document describing in detail how to change it but I
seem to
have a Proxy problem at the moment, so I can't show you the link. :-
( It's
in the "Tips for AIX Administrators", or whatever that's called
nowadays.

--
Simon Green
Altria ITSC Europe s.a.r.l.

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-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On
Behalf Of
Sandor W. Sklar
Sent: 12 April 2006 19:14
To: aix-l@xxxxxxxxxxxxx
Subject: Bad auto-negotiate on network adapter ...


For some reason, my 10/100 Mbps Ethernet adapter has "auto-
negotiated" to 100 HALF, which is causing lots of problems.
<SNIP>

Can I force the card to re-negotiate by doing an ...

ifconfig en0 down ; ifconfig en0 up

... or is there something else I can do to get it to re-negotiate
(short of rebooting)?

Thanks,
-s-

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