John S. Giltner, Jr. wrote:
Michael Schmutzok wrote:
I can't seem to find the answer to this in the OSA manuals so I thought
I'd run it by here......
Two weeks ago, we upgraded to a z890-A04. With this z890 came two OSA
Express 1000Base-T Ethernet cards. I have configured Port 0 on one of
the cards for TCPIP traffic (using QDIO) and port 1 is configured for
ICC (system consoles). No problems there.
Unfortunately, my Auto-Negotiate setting did not negotiate correctly
and we wound up getting 100mbit/half duplex on Port 0 and 100mbit/full
duplex on Port 1 instead of the 1000/full I was looking for. To fix
this, I want to hard code the 1000/full for both of my ports and for the
network connection side (my network people tell me they have to match as
there is no re-broadcast of mode/speed).
My first question is:
Can I do this on the fly without affecting already established TCPIP
connections that are going through the OSA port?
And, two, will the change take effect upon activation (from the
Advanced OSA Facility on the HMC) or will I have to reset the ports on
the OSA card to get them to re-negotiate their speed/mode?
TIA!
Mike Schmutzok
Shands HealthCare
Umm, I not sure but I was under the impression that you can't hard code
a fixed speed for 1000 mbit. I beleive that for gigabit ethernet the
standard required auto speed detect and auto duplex negotation. If you
got 100 mbit/full duplex, then I would verify the cable specs (must be
cat5e or cat6) and length of the cable.
Recently I connected OSA ports to cheap D-Link 1000Mbps switch. 3 ports
got 1000, fourth 100. It was OSC ICC port. Due to recabling I
reconnected the ports - all got 1000. All cables are 5 m long, I used
the same cables in both cases.
BTW: The problem can be unrelated to auto-negotiation. When I used
OSA/SF (Java version) I noticed that card speed radio-button "magically"
switched from Auto to 100Mbps position. I 100% I didn't switch it, I
noticed it several times.
--
Radoslaw Skorupka
Lodz, Poland
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