Re: rac network question

From: David Taft <>
Date: Fri, 11 Jan 2008 11:29:00 -0500
Message-ID: <>


It is possible to use a crossover cable, but as soon as one node goes down you loose the network. This usually results in ORA-29740 errors and even split-brain scenarios. We experienced this several years ago with a large production system. In our case we experienced the following:

RAC Instances Crash with ORA-29740 or ORA-600 [ksxpwait5] on IBM AIX, Doc ID: Note:175678.1

The problem was resolved by replacing the crossover cable with a switch. Crossover cables are not supported by Oracle for RAC, although there was time when this was not the case. Just as an FYI, here is a good note on troubleshooting ORA-29740 errors:

     Troubleshooting ORA-29740 in a RAC Environment
      Doc ID:     Note:219361.1



On Jan 11, 2008 10:45 AM, Andrew Kerber <> wrote:

> And you know, I have read that also now that you mention it. But, I have
> seen a crossover cable used. But, in those cases as I recall they also had
> at least two physical interfaces for the public and two for the private.

Received on Fri Jan 11 2008 - 10:29:00 CST

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