Re: Linux NIC bonding

  • From: "goran bogdanovic" <goran00@xxxxxxxxx>
  • To: "Oracle L" <oracle-l@xxxxxxxxxxxxx>
  • Date: Wed, 12 Dec 2007 12:47:51 +0100

I have to correct myself...
I have recalled my memories for Linux bonding and 'active-backup' is
possible (I haven't used it myself)...when you set mode parameter when
defining bonding drivers here are the possibilities:

mode 0 = active-active (round-robin rule when transmitting packets)
mode 1 = active-passive
mode 2 = indicates either of them can be used

On Dec 12, 2007 10:28 AM, goran bogdanovic <goran00@xxxxxxxxx> wrote:

> 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@xxxxxxxxxxxxx> 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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