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Message-ID: <6d0a3ba80712120128v53cfb52diaafbb6221a0067b@mail.gmail.com>
Date: Wed, 12 Dec 2007 10:28:33 +0100
From: "goran bogdanovic" <goran00@gmail.com>
To: dannorris@dannorris.com
Subject: Re: Linux NIC bonding
Cc: "Oracle L" <oracle-l@freelists.org>
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Hi Dan,

I am not sure if 'active-passive' bonding under Linux is possible but why
would you use 'active-passive' configuration? With 'active-active' you get
load-balancing plus failover capability.

>It's questionable how Oracle would view that from a support perspective (if
they care at all).
As long as bonding driver does not taint the kernel, Oracle will support it.

cheers,
goran


On Dec 12, 2007 6:22 AM, Dan Norris <dannorris@dannorris.com> wrote:

> I'm building a cluster using Oracle Clusterware and have configured
> redundant pairs of NICs on the Linux servers using the Linux bonding module
> (active-passive). I know how to configure the Linux end of things and that's
> working fine. However, the switches used by this customer (they're Dell
> branded--not sure who really makes the guts) have been getting "confused" by
> bonding and our simple ping tests lose about 50% of the packets when we plug
> the redundant pairs into the two separate (trunked) switches.
>
> This is only peripherally related to Oracle--it's really a networking and
> server config issue, but I'm hoping that someone with more networking
> background than I have can explain what switch configuration will enable
> this to work properly. The customer has stated that this will never work
> (though I have done it before at other sites and it worked fine). The
> customer has stated that the Linux configuration must be two active NICs
>  with a virtual IP and virtual MAC. I imagine that will work, but I'm not
> familiar with that configuration and I don't think Linux has native support
> for it, so it'd probably be a Broadcom or Intel software package. It's
> questionable how Oracle would view that from a support perspective (if they
> care at all).
>
> So, the question: Is there some "magical" switch setting that would
> possibly be missing in a fairly "default" configuration that might enable
> this to work properly? I figure it's a long shot asking a networking
> question on the Oracle list, but thanks for any pointers.
>
> Dan
>

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Hi Dan,<br><br>I am not sure if &#39;active-passive&#39; bonding under Linux is possible but why would you use &#39;active-passive&#39; configuration? With &#39;active-active&#39; you get load-balancing plus failover capability.
<br><br>&gt;It&#39;s questionable how Oracle would view that from a support perspective (if they care at all).<br>As long as bonding driver does not taint the kernel, Oracle will support it.<br><br>cheers,<br>goran<br><br>
<br><div class="gmail_quote">On Dec 12, 2007 6:22 AM, Dan Norris &lt;<a href="mailto:dannorris@dannorris.com">dannorris@dannorris.com</a>&gt; wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;">I&#39;m building a cluster using Oracle Clusterware and have configured redundant pairs of NICs on the Linux servers using the Linux bonding module (active-passive). I know how to configure the Linux end of things and that&#39;s working fine. However, the switches used by this customer (they&#39;re Dell branded--not sure who really makes the guts) have been getting &quot;confused&quot; by bonding and our simple ping tests lose about 50% of the packets when we plug the redundant pairs into the two separate (trunked) switches. 
<br><br>This is only peripherally related to Oracle--it&#39;s really a networking and server config issue, but I&#39;m hoping that someone with more networking background than I have can explain what switch configuration will enable this to work properly. The customer has stated that this will never work (though I
 have done it before at other sites and it worked fine). The customer has stated that the Linux configuration must be two active NICs<br>&nbsp;with a virtual IP and virtual MAC. I imagine that will work, but I&#39;m not familiar with that configuration and I don&#39;t think Linux has native support for it, so it&#39;d probably be a Broadcom or Intel software package. It&#39;s questionable how Oracle would view that from a support perspective (if they care at all). 
<br><br>So, the question: Is there some &quot;magical&quot; switch setting that would possibly be missing in a fairly &quot;default&quot; configuration that might enable this to work properly? I figure it&#39;s a long shot asking a networking question on the Oracle list, but thanks for any pointers.
<br><font color="#888888"><br>Dan<br></font></div></div></blockquote></div><br>

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