RE: Dell-Oracle-Linux: Anyone else run this...because its not working for us!

OK, time to demonstate some network ignorance. Our SA says we have straight through ethernet cables, not crossover (switch has been ordered, just not here yet). From what I can tell, crossover cables are needed to connect same devices so the transmit pin from one connects to the receive pin of the other device. If so, shouldn't server to server direct connections use crossover? Would straight through work at all? If they both worked, I am assuming the network flakiness would be observed in either direct connect and a switch would always be necessary. Correct?

Henry

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Pete Sharman
Sent: Tuesday, November 22, 2005 12:02 PM To: adar76_at_inter.net.il
Cc: oracle-l_at_freelists.org; Peter Ross Sharman Subject: RE: Dell-Oracle-Linux: Anyone else run this...because its not working for us!

Yep, as you found out the hard way crossover cables aren't supported. Too many problems that magically disappear when you switch to a switch (if you get what I mean!)  

Pete  

"Controlling developers is like herding cats." Kevin Loney, Oracle DBA Handbook  

"Oh no, it's not. It's much harder than that!" Bruce Pihlamae, long-term Oracle DBA
-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Yechiel Adar
Sent: Wednesday, 23 November 2005 1:11 AM Cc: oracle-l_at_freelists.org
Subject: Re: Dell-Oracle-Linux: Anyone else run this...because its not working for us!

We had a two servers rac that went down. The tar result was: Use switch for interconnet and do not use cross-over network cable.

Adar Yechiel
Rechovot, Israel

Mark Brinsmead wrote:

> I've never experience this myself, but I do know that running a
> two-node cluster with ethernet cross-over cables for the interconnect
> network can cause the entire cluster to fail when one node crashes.
> You must use a hub/switch for the interconnect networks (in production
> anyway). And of course, to avoid single-points-of-failure, you should
> use a separate switch for each network.
>
>

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