Re: [Xen-users] "received packet with own address as source address"

[Theo Cabrerizo Diem <diem@xxxxxxxxxxxx>]

Crap ctrl+enter .... :-P .. sorry everyone about the half message ...
So I'm going to finish it inline.

Btw,

The bridge shouldn't have an IP or mac address .. after all it's a
bridge (IMHO).

If you need an interface between dom0 and one bridge ... :
'modprobe nloopback' on dom0 (which is loaded by default on xend)
you will have 8 veth interfaces (veth0-7, the veth0 is renamed to eth0 by xend 
scripts)
 and 8 vif interfaces (vif0.0 - vif0.7).

you could add vif0.0 to your bridge and set the ip/mac on eth0 (which is what 
xend does).
If you need more bridges or interfaces on your dom0, use the remaining vif's 
and veth's :D

Yes, my box worked a bit by putting an ip on xenbr0, but it turned a bit 
unstable .. after a
couple of domU's a kernel panic happened. (and that could be repeated as many 
times as you whished.
so wasn't a random bug)

After reading carefully the bridge-network script and vif-bridge, I understood 
what xend does at boot
time and could understand much better xen networking :D

[]'s

Theo

On Mon, 2006-10-30 at 16:48 +0100, Theo Cabrerizo Diem wrote:
> Hi Tiago,
> 
> well ... as I said before .. I wouldn't set your eth0 mac address (on
> dom0 ) to the broadcast one ... 
> 
> Before setting the one on peth0, write it down and set eth0 (of your
> Dom0, not the DomU's) to it.
> 
> That can be done easily on the init scripts (sorry, I use debian, so the
> network scripts are completely different) :)
> 
> But the peth0 and xenbr0 mac addresses should be fe:ff:ff:ff:ff:ff  =)
> 
> []'s
> 
> Theo Diem
> 
> 
> On Mon, 2006-10-30 at 12:37 -0300, Tiago Cruz wrote:
> > Hello Theo, many thanks for your help! ;)
> > 
> > On Mon, 2006-10-30 at 13:59 +0100, Theo Cabrerizo Diem wrote:
> > 
> > > I got that message when my xenbr0/peth0 (yes, the real eth0, renamed by
> > > xend scripts) interfaces (or whatever bridge name you are using) have a
> > > MAC address configured in it.
> > 
> > Well, I don't know exactly what's happen but I've configured only my
> > eth0 on boot time, and put this on my rc.local:
> > 
> > ip link set peth0 down
> > ip link set peth0 mac fe:ff:ff:ff:ff:ff
> > ip link set peth0 up
> > 
> > ip link set xenbr0 down
> > ip link set xenbr0 mac fe:ff:ff:ff:ff:ff
> > ip link set xenbr0 up
> > 
> > ip link set eth0 down
> > ip link set eth0 mac fe:ff:ff:ff:ff:ff arp off
> > ip link set eth0 up
> > 
> > 
> > Now, after boot my machine don't crash any more, but the bridge stay
> > without IP/MAC:
> > 
> > xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
> >           inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
> >           UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
> >           RX packets:159 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:0 
> >           RX bytes:14472 (14.1 KiB)  TX bytes:0 (0.0 b)
> > 
> > [root@xen ~]# brctl show
> > bridge name     bridge id               STP enabled     interfaces
> > xenbr0          8000.feffffffffff       no              peth0
> >                                                         vif0.0
> > 
> > Anyway, look that is all working now :)
> > Many thanks!
> > 
> > - Tiago Cruz
> > 
> 
> 
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> 


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