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Re: [Xen-users] Debian domU interface naming strangeness

To: Stephan Seitz <s.seitz@xxxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Debian domU interface naming strangeness
From: Alexander Hoßdorf <xen-users@xxxxxxxxxxx>
Date: Fri, 01 Aug 2008 00:40:09 +0200
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And in addition to this ;-)

localhost:~# dmesg|grep -i eth
netfront: Initialising virtual ethernet driver.
netfront: device eth0 has flipping receive path.

This is not an error I think. It's an information.
If a fix mac adress isn't a working solution for you,
you might try to place this on your DomU kernel command line:
'xennet.rx_copy'

This is "copying recieve path".

Perhaps genereally using a newer version of xen hypervisor is also a great idea ;-)

Cheers,
Alex


Stephan Seitz schrieb:
Additionally, add a fixed mac adress to your vif line in your domU config, like

vif = [ 'mac=nn:nn:nn:nn:nn:nn,brigde=xxxxx' ]

otherwise domU's udev will start counting again on every boot (say, mac address change)



Alexander Hoßdorf schrieb:
Hi,

Have you got persistent mac adress configured for domU?
You have a file called /etc/udev/rules.d/z25-persistent-net.rules in debian DomU.
empty it and reboot DomU.

Hope this helps.

Cheers,
Alex


Ray Barnes schrieb:
Hi all.  I've got a Debian domU I created from scratch a few weeks
ago.  Every time I rolled it out previously in testing, it worked
fine.  But now it seems to make the ethernet device eth1 rather than
eth0 in the domU:

localhost:~# ifconfig -a
eth1      Link encap:Ethernet  HWaddr 00:16:3E:3D:A0:30
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 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:0 (0.0 b)  TX bytes:0 (0.0 b)

localhost:~# dmesg|grep -i eth
netfront: Initialising virtual ethernet driver.
netfront: device eth0 has flipping receive path.
localhost:~#

Note that as eth1, it routes traffic just fine.  I can ifconfig it up
and set an IP address, then get good routed connectivity.  I'm seeing
this eth1 naming issue on dom0s running CentOS 5.0 with the stock Xen
3.0.3 (yes that means literally 5.0, not a higher minor number), as
well as Cent 5.1 with Xen 3.2.0 compiled from source.  But obviously
it presents a problem since I can't count on consistent naming.

Thoughts?

-Ray

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