Traffic going to eth1 is goin

[Furnish, Trever G]

Hi, Ugo,

For 'exactly what they mean', take a look in 'Understanding Linux Network Internals':
http://books.google.com/books?id=w3EHS2cobBAC&pg=PA709&lpg=PA709&dq=arp_ignore+arp_announce+oreilly&source=bl&ots=balIe_vcgi&sig=0RFdgQUNDNXoWorAJ69nqpeNDGM&hl=en&ei=eIOcSc3NEoqhtwel2sziBA&sa=X&oi=book_result&resnum=9&ct=result#PPA709,M1

-t.
 

> -----Original Message-----
> From: redhat-list-bounces at redhat.com [mailto:redhat-list-
> bounces at redhat.com] On Behalf Of Ugo Bellavance
> Sent: Friday, January 16, 2009 2:30 PM
> To: redhat-list at redhat.com
> Subject: Re: Traffic going to eth1 is goin
> 
> Broekman, Maarten a écrit :
> >>  -----Original Message-----
> >>  From: redhat-list-bounces at redhat.com
> >>  [mailto:redhat-list-bounces at redhat.com] On Behalf Of Michael
> Simpson
> >>  Sent: Thursday, January 15, 2009 8:49 AM
> >>  To: General Red Hat Linux discussion list
> >>  Subject: Re: Traffic going to eth1 is goin
> >>
> >>  On 1/13/09, Ugo Bellavance <ugob at lubik.ca> wrote:
> >>  > Hi,
> >>  >
> >>  > I'm scratching my head on this one...
> >>  >
> >>  > I've configured a server with 2 network interfaces, eth0
> >>  and eth1.  eth0 =
> >>  > 192.168.2.211 and eth1 = 192.168.2.212.  eth1 seemed to
> >>  work properly, but
> >>  > whenever I open a connection to 192.168.2.212, I see the
> >>  traffic on eth0.
> >>
> >>  you can't use 2 interfaces on the same subnet without bonding
> >>  you used to be able to years ago but it doesn't work now
> >>  note your default route
> >>
> >>  mike
> >
> > That's not strictly true.  You can use as many interfaces on the same
> > subnet as you want and traffic to the IP addresses on those
> interfaces
> > will come in initially on that interface, but then the local routing
> > rules will force the traffic out the default route, which would
> appear
> > to be eth0.  You can change that behavior by setting up iptables
> rules
> > that force the traffic over different interfaces depending on the
> source
> > / destination of the traffic.
> 
> Or use those 2 lines at the bottom of sysctl.conf and run sysctl -p
> 
> net.ipv4.conf.all.arp_ignore=2
> net.ipv4.conf.all.arp_announce=1
> 
> I haven't found exactly what they mean, but I tested it and it works.
> 
> Regards,
> 
> Ugo
> 
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