Re: [Xen-users] domU network has sleeping sickness

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

Joshua West wrote:
> The symptoms you describe sound similar to whats found when there's a
> MAC address conflict.  Make sure that the MAC addresses of your virtual
> machines are completely unique and not used anywhere else in your network.
>
> Marc Teichgraeber wrote:
>   
> > Hi all,
> >
> > I have a strange network problem with some domU's on three XEN-Hosts.
> > They are loosing their network connectivity. I do bridged networking.
> >    * It happens randomly and could happen right after bootup of the domU
> > or anytime later.
> >    * The domU is not reachable from another host on the LAN.
> >    * The domU is always reachable from the dom0 (ssh, ping).
> >    * I can 'repair' the connection when attaching to the console and
> > ping out from the domU. First nothings happens, then the machine gets
> > back their network. (And thats also my momentary workaround, pinging all
> > the time from the console)
> >    * Pinging from another host at the same time helps too.
> >    * It could be that I can ping continously from one host and another
> > hosts gets only every 10th packet or so back.
> >    * The interfaces could come back from their sleep by itself.
> >    * When the networks has fallen asleep, ssh on the domU from another
> > host hangs, it does not come back with "no route to host" or something.
> >
> > I'm suspicious about the network controllers, they are the same on all
> > hosts: "Intel Corporation 80003ES2LAN Gigabit Ethernet Controller
> > (Copper)"(lspci) some kind of "Intel® PRO/1000 EB Network Connection
> > with I/O Acceleration"(Intel website). I've tried the latest e1000
> > driver from Intel but it does'nt helped.
> > I've checked all MAC Adresses, they are unique, also the IP Adresses.
> >
> >     
< -- snip -->

Joshua, what will happen if the network aliases (eth0:0, eth0:1, eth0:2, 
etc) all have same MAC address?
and how do I know what MAC address to give to the dom_U's?

--

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other 
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