Hello,
I have a network issue in dom0; I''m not sure if it''s a
configuration
problem or a design problem in my setup.
My setup:
The server (dom0) runs Ubuntu 7.10, Xen was installed using apt-get
(means version: Xen 3.10, Kernel 2.6.22-14). This server has 4 NICs. I
use bridged networking with my own script which creates 4 bridges
("$dir/network-bridge" "$g" vifnum=0 netdev=eth0
bridge=xenbr0 - this
line I use four times for each interface). This works great so far.
/etc/network/interfaces in dom0 brings only up eth2 with a static
address (10.10.1.2). domU1 acts as router/firewall and has all bridges
connected to it. And every ethX in domU1 has it''s own subnet
(10.10.1.0/24 to 10.10.4.0/24). This works as well.
My problem:
Each time I download a lot of data (i.e. an apt-get upgrade which
upgrades the kernel) in dom0, the network in dom0 freezes.
Furthermore, the whole subnet 10.10.1.0/24 freezes. The network comes
back after a couple of minutes or after a couple of hours. This
varies. So far, I couldn''t find any log, where I entry is made when
the network stalles.
I can''t access any other net from within dom0 and dom0 can''t
be
accessed from any other place.
My question:
What could be the problem for this behaviour?
Is there a better way to access dom0 from within domU1 (or any other
domU)?
Thank you in advance for any tipps.
Regards,
Markus
_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users
Hi Todd,
I just created a dummy interface and added it to a new bridge. Like this I can
now access dom0 again from domU1 (which is the firewall/router) and vice versa.
Respectifly I can access every machine in my different subnets and the internet
fromdom0.
But: I still have the problem that the network goes down when transfering a lot
of data. It''s not as bad as before, since dom0 now has it''s
own newtorksegment - the rest of the network is no longer affected and the users
can work normally. But it''s still not possible to copy a lot of data.
It''s no difference whether I copy (wget) data from the internet or from
another local machine (scp). And I still can''t find any log entry...
What else can I try?
Thanks & regards,
Markus
----- Ursprüngliche Nachricht -----
Von: "Todd Deshane" <deshantm@gmail.com>
An: "Markus Gerber" <markus@gerber-net.ch>
Gesendet: Dienstag, 29. Januar 2008 17.02 Uhr (GMT+0100) Europe/Berlin
Betreff: Re: [Xen-users] Network issue in dom0
Hi Markus,
You could setup a dummy device in dom0 and have it bridge with a private network
of your domU1.
If you look back within the last week or so. I gave some basic instructions on
how to do this. Let me/the list know if you run into problems or have further
questions on that.
Regards,
Todd
On Jan 29, 2008 1:51 AM, Markus Gerber < markus@gerber-net.ch > wrote:
Hi Todd,
The idea of this setup is that I do not want to provide any service in dom0.
In domU1 I have all the NICs in it, since it is the router/firewall. The other
domUs are in different subnets and have therefore access to different NICs
(there are other servers - in the respective subnet - that are connected to the
server).
My main question is how to best access dom0...
Thanks and regards,
Markus
On 29.01.2008, at 05:32, Todd Deshane wrote:
On Jan 27, 2008 12:08 PM, Markus Gerber < markus@gerber-net.ch > wrote:
Hello,
I have a network issue in dom0; I''m not sure if it''s a
configuration
problem or a design problem in my setup.
My setup:
The server (dom0) runs Ubuntu 7.10, Xen was installed using apt-get
(means version: Xen 3.10, Kernel 2.6.22-14). This server has 4 NICs. I
use bridged networking with my own script which creates 4 bridges
("$dir/network-bridge" "$g" vifnum=0 netdev=eth0
bridge=xenbr0 - this
line I use four times for each interface). This works great so far.
/etc/network/interfaces in dom0 brings only up eth2 with a static
address ( 10.10.1.2 ). domU1 acts as router/firewall and has all bridges
connected to it. And every ethX in domU1 has it''s own subnet
( 10.10.1.0/24 to 10.10.4.0/24 ). This works as well.
My problem:
Each time I download a lot of data (i.e. an apt-get upgrade which
upgrades the kernel) in dom0, the network in dom0 freezes.
Furthermore, the whole subnet 10.10.1.0/24 freezes. The network comes
back after a couple of minutes or after a couple of hours. This
varies. So far, I couldn''t find any log, where I entry is made when
the network stalles.
I can''t access any other net from within dom0 and dom0 can''t
be
accessed from any other place.
My question:
What could be the problem for this behaviour?
Is there a better way to access dom0 from within domU1 (or any other
domU)?
Thank you in advance for any tipps.
I don''t have any ideas yet. What is the purpose of this setup though?
Regards,
Todd
Regards,
Markus
_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users
_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users
On Jan 30, 2008 4:52 AM, Markus Gerber <markus@gerber-net.ch> wrote:> Hi Todd, > > I just created a dummy interface and added it to a new bridge. Like this I > can now access dom0 again from domU1 (which is the firewall/router) and vice > versa. Respectifly I can access every machine in my different subnets and > the internet fromdom0. > > But: I still have the problem that the network goes down when transfering > a lot of data. It''s not as bad as before, since dom0 now has it''s own > newtorksegment - the rest of the network is no longer affected and the users > can work normally. But it''s still not possible to copy a lot of data. It''s > no difference whether I copy (wget) data from the internet or from another > local machine (scp). And I still can''t find any log entry... > > > > What else can I try? >I think I remember a bug recently about someone with a similar network problem, but I think they had a crash when doing a large transfer. Does anyone else recall that? Maybe you can search the archives and also the bugs. I do think that it is probably some sort of bug though, as network io is known to work of course. Thanks & regards,> > Markus > > > > > ----- Ursprüngliche Nachricht ----- > Von: "Todd Deshane" <deshantm@gmail.com> > An: "Markus Gerber" <markus@gerber-net.ch> > Gesendet: Dienstag, 29. Januar 2008 17.02 Uhr (GMT+0100) Europe/Berlin > Betreff: Re: [Xen-users] Network issue in dom0 > > > Hi Markus, > > You could setup a dummy device in dom0 and have it bridge with a private > network of your domU1. > > If you look back within the last week or so. I gave some basic > instructions on how to do this. Let me/the list know if you run into > problems or have further questions on that. > > Regards, > Todd > > On Jan 29, 2008 1:51 AM, Markus Gerber <markus@gerber-net.ch> wrote: > > > Hi Todd, > > The idea of this setup is that I do not want to provide any service in > > dom0. > > > > In domU1 I have all the NICs in it, since it is the router/firewall. The > > other domUs are in different subnets and have therefore access to different > > NICs (there are other servers - in the respective subnet - that are > > connected to the server). > > > > My main question is how to best access dom0... > > > > Thanks and regards, > > Markus > > > > > > On 29.01.2008, at 05:32, Todd Deshane wrote: > > > > > > > > On Jan 27, 2008 12:08 PM, Markus Gerber <markus@gerber-net.ch> wrote: > > > > > Hello, > > > > > > I have a network issue in dom0; I''m not sure if it''s a configuration > > > problem or a design problem in my setup. > > > > > > My setup: > > > The server (dom0) runs Ubuntu 7.10, Xen was installed using apt-get > > > (means version: Xen 3.10, Kernel 2.6.22-14). This server has 4 NICs. I > > > use bridged networking with my own script which creates 4 bridges > > > ("$dir/network-bridge" "$g" vifnum=0 netdev=eth0 bridge=xenbr0 - this > > > line I use four times for each interface). This works great so far. > > > /etc/network/interfaces in dom0 brings only up eth2 with a static > > > address (10.10.1.2). domU1 acts as router/firewall and has all bridges > > > connected to it. And every ethX in domU1 has it''s own subnet > > > (10.10.1.0/24 to 10.10.4.0/24). This works as well. > > > > > > My problem: > > > Each time I download a lot of data (i.e. an apt-get upgrade which > > > upgrades the kernel) in dom0, the network in dom0 freezes. > > > Furthermore, the whole subnet 10.10.1.0/24 freezes. The network comes > > > back after a couple of minutes or after a couple of hours. This > > > varies. So far, I couldn''t find any log, where I entry is made when > > > the network stalles. > > > I can''t access any other net from within dom0 and dom0 can''t be > > > accessed from any other place. > > > > > > My question: > > > What could be the problem for this behaviour? > > > Is there a better way to access dom0 from within domU1 (or any other > > > domU)? > > > > > > Thank you in advance for any tipps. > > > > > > > I don''t have any ideas yet. What is the purpose of this setup though? > > > > Regards, > > Todd > > > > > > > > > > > > Regards, > > > Markus > > > _______________________________________________ > > > Xen-users mailing list > > > Xen-users@lists.xensource.com > > > http://lists.xensource.com/xen-users > > > > > > > > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Has anyone information about the bu Todd mentioned. Unfortuantely I couldn''t find any information about it. And I''m still struggeling with the error... Regards, Markus On 30.01.2008, at 14:59, Todd Deshane wrote:> > > On Jan 30, 2008 4:52 AM, Markus Gerber <markus@gerber-net.ch> wrote: > Hi Todd, > > I just created a dummy interface and added it to a new bridge. Like > this I can now access dom0 again from domU1 (which is the firewall/ > router) and vice versa. Respectifly I can access every machine in my > different subnets and the internet fromdom0. > > But: I still have the problem that the network goes down when > transfering a lot of data. It''s not as bad as before, since dom0 now > has it''s own newtorksegment - the rest of the network is no longer > affected and the users can work normally. But it''s still not > possible to copy a lot of data. It''s no difference whether I copy > (wget) data from the internet or from another local machine (scp). > And I still can''t find any log entry... > > > What else can I try? > > > I think I remember a bug recently about someone with a similar > network problem, but I think they had a crash when doing a large > transfer. Does anyone else recall that? Maybe you can search the > archives and also the bugs. > > I do think that it is probably some sort of bug though, as network > io is known to work of course. > > > Thanks & regards, > > Markus > > > > ----- Ursprüngliche Nachricht ----- > Von: "Todd Deshane" <deshantm@gmail.com> > An: "Markus Gerber" <markus@gerber-net.ch> > Gesendet: Dienstag, 29. Januar 2008 17.02 Uhr (GMT+0100) Europe/Berlin > Betreff: Re: [Xen-users] Network issue in dom0 > > > > Hi Markus, > > You could setup a dummy device in dom0 and have it bridge with a > private network of your domU1. > > If you look back within the last week or so. I gave some basic > instructions on how to do this. Let me/the list know if you run into > problems or have further questions on that. > > Regards, > Todd > > On Jan 29, 2008 1:51 AM, Markus Gerber <markus@gerber-net.ch> wrote: > Hi Todd, > > The idea of this setup is that I do not want to provide any service > in dom0. > > In domU1 I have all the NICs in it, since it is the router/firewall. > The other domUs are in different subnets and have therefore access > to different NICs (there are other servers - in the respective > subnet - that are connected to the server). > > My main question is how to best access dom0... > > Thanks and regards, > Markus > > > On 29.01.2008, at 05:32, Todd Deshane wrote: > > > > On Jan 27, 2008 12:08 PM, Markus Gerber <markus@gerber-net.ch> wrote: > Hello, > > I have a network issue in dom0; I''m not sure if it''s a configuration > problem or a design problem in my setup. > > My setup: > The server (dom0) runs Ubuntu 7.10, Xen was installed using apt-get > (means version: Xen 3.10, Kernel 2.6.22-14). This server has 4 NICs. I > use bridged networking with my own script which creates 4 bridges > ("$dir/network-bridge" "$g" vifnum=0 netdev=eth0 bridge=xenbr0 - this > line I use four times for each interface). This works great so far. > /etc/network/interfaces in dom0 brings only up eth2 with a static > address (10.10.1.2). domU1 acts as router/firewall and has all bridges > connected to it. And every ethX in domU1 has it''s own subnet > (10.10.1.0/24 to 10.10.4.0/24). This works as well. > > My problem: > Each time I download a lot of data (i.e. an apt-get upgrade which > upgrades the kernel) in dom0, the network in dom0 freezes. > Furthermore, the whole subnet 10.10.1.0/24 freezes. The network comes > back after a couple of minutes or after a couple of hours. This > varies. So far, I couldn''t find any log, where I entry is made when > the network stalles. > I can''t access any other net from within dom0 and dom0 can''t be > accessed from any other place. > > My question: > What could be the problem for this behaviour? > Is there a better way to access dom0 from within domU1 (or any other > domU)? > > Thank you in advance for any tipps. > > I don''t have any ideas yet. What is the purpose of this setup though? > > Regards, > Todd > > > > Regards, > Markus > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users