Re: [Xen-devel] Xen 3.0 Xend loses network - eth0 -> veth0? (fwd)

[David F Barrera <dfbp@xxxxxxxxxx>]

On Thu, 2005-06-09 at 13:59 +0200, Jurgen Stroo wrote:
> No one else got this problem with Xen Unstable anyway?
Well, not sure it is the same issue. But, today I lost network when I
started xend. The thing is I can't seem to be able to reproduce it
consistently.
> 
> >Hi Keir, and others, I didn't have time last week to further investigate
> >the problem, but I'm able to do now.
> >
> >When I do the network scripts by hand, as I already mentioned,
> >things are going well and the interface and routing configuration are
> >okay. this means correct routes via veth0 etc. Also eth0 got its
> >FE:FF:FF:FF:FF:FF correctly.
> >
> >The arp table looks good actually:
> >
> >normal situation without xen:
> >megalosaurus:~# cat /proc/net/arp
> >IP address       HW type     Flags       HW address            Mask
> >Device
> >10.0.0.3         0x1         0x2         00:01:02:0A:25:0D     *
> >eth0
> >10.0.0.142       0x1         0x0         00:00:00:00:00:00     *
> >eth0
> >10.0.0.141       0x1         0x0         00:00:00:00:00:00     *
> >eth0
> >10.0.0.254       0x1         0x2         00:13:49:10:0B:E0     *
> >eth0
> >
> >And with Xen and the veth0 interface:
> >IP address       HW type     Flags       HW address            Mask
> >Device
> >10.0.0.141       0x1         0x0         00:00:00:00:00:00     *
> >veth0
> >10.0.0.142       0x1         0x0         00:00:00:00:00:00     *
> >veth0
> >10.0.0.3         0x1         0x2         00:01:02:0A:25:0D     *
> >veth0
> >10.0.0.254       0x1         0x2         00:13:49:10:0B:E0     *
> >veth0
> >
> >
> >Looks perfectly right, I don't know what the problem could be actually.
> >Everyting looks right and they reply to each others arp requests, that
> >means on ARP level they see each other and reply to each other with the
> >ARP replies.
> >
> >:-S
> >Jurgen
> >
> 
> Although very unlikely, it seems Keir Fraser stated on Jun 6 that :
> 
> >
> > On 5 Jun 2005, at 21:53, Jurgen Stroo wrote:
> >
> > >
> > > The thing is, after I've got the following configuration it is still
> > > -NOT-
> > > working:
> > >
> > > megalosaurus:~# ifconfig -a
> > > eth0      Link encap:Ethernet  HWaddr FF:FF:FF:FF:FF:FF
> >
> > The MAC address should be FE:FF:FF:FF:FF:FF. The one above is the
> > broadcast address. Not sure if it actually matters, but worth fixing
> > anyway as it might confuse the bridge.
> >
> > I had problems with ARP when I first started testing veth0. It turned
> > out that domain0 was not applying the information in ARP packets to the
> > ARP cache. Since the ARP cache wasn't kept up to date, I saw very weird
> > IP behaviour.
> >
> > I fixed that particular bug, but maybe there's another one. It is
> > perhaps worth looking at /proc/net/arp and seeing how it compares with
> > other machines on your network.
> >
> >   -- Keir
> >
> >
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
> 
-- 
Regards,

David F Barrera
Linux Technology Center
Systems and Technology Group, IBM

"The wisest men follow their own direction. "
                                                        Euripides


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel