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

Henry,
I can't answer much to what flakiness you are observing, but you are correct in your assumption about direct connect. You need the crossover cable so that tx goes to rcv and vise-verse. You'll get a network cable unplugged error if you try to direct connect two servers with a straight pass through cable.

Rodd

Henry Poras wrote:

>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.
>>
>>

-- 
Rodd Holman
Enterprise Data Systems Engineer
LodgeNet Entertainment Corporation
rodd.holman_at_gmail.com

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