Mailing List Archive: lo doesn't come up

lo doesn't come up

Jul 14, 2005, 8:18 PM

Post #1 of 4 (541 views)

Hi, all. This probably isn't really a Xen issue, but I've never seen the
problem in a UML instance, or a straight Debian install. I created a
Debian setup in Xen with debootstrap, and ran it as a Xen guest with
hardware access using my Xen0 kernel so that I can allocate my NICs to
the Xen guest. The NICs and virtual device set up by the Xen bridging
scripts seem to come up when the guest is booted, but the loopback
device doesn't. This creates odd behavior when, for example, I try to
ping out, and also seems to prevent sshd from starting. Has anyone seen
anything like this?

Thanks!

-sten

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Re: lo doesn't come up [ In reply to ]

thomas at lohmueller

Jul 15, 2005, 12:52 AM

Post #2 of 4 (531 views)

Permalink

Hi

debootstrap doesn't generate the following config-files:
- /etc/fstab
- /etc/apt/sources.list
- /etc/network/interfaces

To get the loopback interface, just add
auto lo
iface lo inet loopback
to /etc/network/interfaces and write "ifup lo" or reboot the guest.

Hope that helps.

Thomas

Am Freitag 15 Juli 2005 05:18 schrieb sten:
> Hi, all. This probably isn't really a Xen issue, but I've never seen the
> problem in a UML instance, or a straight Debian install. I created a
> Debian setup in Xen with debootstrap, and ran it as a Xen guest with
> hardware access using my Xen0 kernel so that I can allocate my NICs to
> the Xen guest. The NICs and virtual device set up by the Xen bridging
> scripts seem to come up when the guest is booted, but the loopback
> device doesn't. This creates odd behavior when, for example, I try to
> ping out, and also seems to prevent sshd from starting. Has anyone seen
> anything like this?
>
> Thanks!
>
> -sten
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users

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Xen-users@lists.xensource.com
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Re: lo doesn't come up [ In reply to ]

lists at redboy

Jul 15, 2005, 6:38 AM

Post #3 of 4 (531 views)

Permalink

Thomas Lohmüller wrote:
> Hi
>
> debootstrap doesn't generate the following config-files:
> - /etc/fstab
> - /etc/apt/sources.list
> - /etc/network/interfaces
>
> To get the loopback interface, just add
> auto lo
> iface lo inet loopback
> to /etc/network/interfaces and write "ifup lo" or reboot the guest.

sorry, I should have said; I did all that. Even with "auto lo" in the
file, lo doesn't come up. All my other interfaces seem like they do.

-sten

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Re: lo doesn't come up [ In reply to ]

thomas at lohmueller

Jul 15, 2005, 3:35 PM

Post #4 of 4 (533 views)

Permalink

What's the output of "ifconfig lo"?

I don't think that it's possible to disable the loobpack interface in the
kernel configuration. Is it?

Thomas

Am Freitag 15 Juli 2005 15:38 schrieb sten:
> Thomas Lohmüller wrote:
> > Hi
> >
> > debootstrap doesn't generate the following config-files:
> > - /etc/fstab
> > - /etc/apt/sources.list
> > - /etc/network/interfaces
> >
> > To get the loopback interface, just add
> > auto lo
> > iface lo inet loopback
> > to /etc/network/interfaces and write "ifup lo" or reboot the guest.
>
> sorry, I should have said; I did all that. Even with "auto lo" in the
> file, lo doesn't come up. All my other interfaces seem like they do.
>
> -sten
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users

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