Re: Unable to ping gateway
On Mon, 20 Sep 2004 19:38:20 +0200, Jacob Larsen wrote:
>
> Sergio Basurto wrote:
> > ----------------------------------------------------
> > When bonding is set up with the ARP monitor, it is
> > important that the
> > slave devices not have routes that supercede routes
of
> > the master (or,
> > generally, not have routes at all). For example,
> > suppose the bonding
> > device bond0 has two slaves, eth0 and eth1, and the
> > routing table is
> > as follows:
> >
> > Kernel IP routing table
> > Destination Gateway Genmask
Flags
>
> > MSS Window irtt Iface
> > 10.0.0.0 0.0.0.0 255.255.0.0 U
>
> > 40 0 0 eth0
> > 10.0.0.0 0.0.0.0 255.255.0.0 U
>
> > 40 0 0 eth1
> > 10.0.0.0 0.0.0.0 255.255.0.0 U
>
> > 40 0 0 bond0
> > 127.0.0.0 0.0.0.0 255.0.0.0 U
>
> > 40 0 0 lo
> >
> > In this case, the ARP monitor (and ARP itself) may
> > become confused,
> > because ARP requests will be sent on one interface
> > (bond0), but the
> > corresponding reply will arrive on a different
> > interface (eth0). This
> > reply looks to ARP as an unsolicited ARP reply
> (because
> > ARP matches
> > replies on an interface basis), and is discarded.
> This
> > will likely
> > still update the receive/transmit times in the
driver,
> > but will lose
> > packets.
> >
> > The resolution here is simply to insure that slaves
do
> > not have routes
> > of their own, and if for some reason they must,
those
> > routes do not
> > supercede routes of their master. This should
> > generally be the case,
> > but unusual configurations or errant manual or
> > automatic static route
> > additions may cause trouble.
> >
> > From:"Linux Ethernet Bonding Driver mini-howto"
> >
-----------------------------------------------------
>
> So the solution is to not set a gateway for eth0 and
> eth1, but only set
> it for bond0?
>
> Thanks,
> Jacob
Yes,
But you also could have gw for your eth's cards, but
you must assure that those routes do not supercede the
bond0.
If this do not help you can consult a good doc at:
http://ece.wpi.edu/pit/rowitsch/linux-2.4.21/Documentation/networking/bonding.txt
Kind Regards
Ing. Sergio Basurto Juárez
Tel: 04455-85322945
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