Multiple NICS - Real Servers

Horms horms at
Thu Aug 9 00:57:18 BST 2001

On Wed, Aug 08, 2001 at 01:21:27PM -0400, John Cronin wrote:
> > 
> > Joseph Mack wrote:
> > > 1. channel bonding, where multiple NICs on a machine have the
> > > same IP and MAC address and are used for higher throughput.
> > > I read through 2yrs of messages on the beowulf mailing list
> > > about this last night and couldn't see anywhere where people
> > > allow this sort of setup to run after one card has failed.
> > > I presume it's not doable.
> > 
> > It is not doable. If one of the NICs fails, every other packet will be 
> > dropped.
> Perhaps on one particular implementation this is true, but I don't
> think you can say that in general, for all multi-NIC channel aggregation
> setups, this is true.

Applogies for being vauge but I once saw a demonstration from Intel showing
two 100Mb nics plugged into a switch. If both the Nics were available then
both would be used, if one failed only one would be used. My understanding
is that this system requires specific NICs and support on the switch but it
did seem to work quite nicley. This was about 2 years ago and I haven't
seen anything about it since.


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