[CentOS] Forcing ifcfg-eth0 to use the same nic in multi nic machine

Brian Mathis brian.mathis at gmail.com
Wed Aug 15 13:09:24 UTC 2007


On 8/15/07, Dave K <davek08054 at gmail.com> wrote:
> On 8/15/07, Les Mikesell <lesmikesell at gmail.com> wrote:
> > Lanny Marcus wrote:
> > > I agree with Doug and Johnny. My belief is that every NIC in the world
> > > is supposed to have a unique MAC address.
> >
> > Everyone believed that except DECnet which expected all cards in the
> > same machine to have the same MAC.
>
> I guess you haven't worked with Sun systems lately.  Although every
> Sun NIC does have it's own MAC address, by default the system uses one
> MAC for all of them.  I have yet to decide if this is a Good Thing or
> not....
>
> --
> Dave K

It actually makes sense, from a failover point of view.  I would
suspect that if you connected both of those NICs to the same subnet,
it would allow immediate failover if one port were to go bad.  That
scenario assumes they are both on the same subnet though.



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