[c-nsp] General switching question regarding load balancing host

[Jay Nakamura]

I am glad I asked.  Something wasn't sitting right in my gut.  It's
nice to see real life example to verify my concern.

On Fri, Sep 17, 2010 at 12:12 PM, Gert Doering <gert at greenie.muc.de> wrote:
> Hi,
>
> On Fri, Sep 17, 2010 at 11:52:41AM -0400, Jay Nakamura wrote:
>> Some hosts/OS can do load balancing between NICs.  If a host has two
>> NICs connected to two switches,(the two switches are connected
>> together) and load balancing between them, switch will see the same
>> source MAC from two ports.
>
> Don't do this.
>
> If the ports go to two different switches (that cannot do cross-chassis
> etherchannel), use active/passive bundling, not load-sharing.
>
> gert
> --
> USENET is *not* the non-clickable part of WWW!
>                                                           //www.muc.de/~gert/
> Gert Doering - Munich, Germany                             gert at greenie.muc.de
> fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
>