Xen users - Nov 2011 - Re: Re: I have no xenbr0 and peth0 with bridge-utils package

Fajar,
 
Thanks for your proposal.
because I plan to make some development in the xen source codes,I cannot use
distro-bundled Xen and have to compile them by myself.
I  install xen on CentOS 6.0 .When i try to set up xend ,there is something
wrong happening.The following is about the outcome of some commands(including
"brctl show")just after opening the gnome-terminal.
 
[root@localhost ~]# brctl show
bridge name bridge id  STP enabled interfaces
[root@localhost ~]# service xencommons start
Starting xenstored...
Setting domain 0 name...
Starting xenconsoled...
[root@localhost ~]# service xend start
RTNETLINK answers: Device or resource busy
[root@localhost ~]# service xendomains start
[root@localhost ~]# brctl show
bridge name bridge id  STP enabled interfaces
tmpbridge  8000.000000000000 no  
[root@localhost ~]#
 
I can do nothing about this and this problem have influence on vms'
creation.Help please.
 
**********************************************************************************************************************
//The words below are previous.
 
> Dear list members,
>
> I have a problem when i finish installing the xen 4.1.2 and linux kernel
> 3.0.4.
>
> After I start the services of xencommons,xend and xendomains, I cannot find
> the xenbr0 and peth0 using the command 'ifconfig'.Meanwhile new vms
cannot
> be set up normally. I confirm that i have installed the package of
> bridge-utils and the line "(network-script network-bridge)" in
> xend-config.sxp is without the beginning of "#".
>
> This problem is important to me and i have taken a lot of time on it.
> I need  your advice.please help me.
Short answer: don't bother. Just use distro-bundled Xen, and if
there's a problem people using the same distro can help you.

Long answer:
Newer version of Xen won't have xenbr0. This is normal. The bridge
will be eth0 (or whatever your primary network device is). What is the
output of "brctl show"?

Also, the current recommended way to setup bridge is to use your
distro's mechanism (e.g. /etc/network/interfaces,
/etc/sysconfig/network-scripts/*), so you shouldn't use network-bridge
script.

--
Fajar



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2011/11/1 hxkhust <hxkhust@126.com>:
> [root@localhost ~]# brctl show
> bridge name bridge id  STP enabled interfaces
> [root@localhost ~]# service xencommons start
> Starting xenstored...
> Setting domain 0 name...
> Starting xenconsoled...
> [root@localhost ~]# service xend start
> RTNETLINK answers: Device or resource busy
Something''s wrong there.
> [root@localhost ~]# service xendomains start
> [root@localhost ~]# brctl show
> bridge name bridge id  STP enabled interfaces
> tmpbridge  8000.000000000000 no
You can try to look at network-bridge script and figure out what''s
wrong, but IMHO it''s better to just create bridges using OS config
files in RHEL6. An example for KVM (which should also work on xen):
http://www.techotopia.com/index.php/Creating_an_RHEL_6_KVM_Networked_Bridge_Interface
. In that example the bridge name is bridge0, but you can change it to
whatever you want (including xenbr0).

-- 
Fajar

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Thank you for your help.
/etc/xen/scripts/network-bridge hasn't been changed since the xen source
package is extracted.Someone else install xen successfully without changing that
script ,according to my observation.Is there something wrong with my network
device?Or my network driver doesn't support my network device well?(When the
error happen after "launching service xend start", my network
connection is also broken.)

hxk
 
At 2011-11-01 11:07:13,"Fajar A. Nugraha" <list@fajar.net>
wrote:
>2011/11/1 hxkhust <hxkhust@126.com>:
>> [root@localhost ~]# brctl show
>> bridge name bridge id  STP enabled interfaces
>> [root@localhost ~]# service xencommons start
>> Starting xenstored...
>> Setting domain 0 name...
>> Starting xenconsoled...
>> [root@localhost ~]# service xend start
>> RTNETLINK answers: Device or resource busy
>
>Something's wrong there.
>
>> [root@localhost ~]# service xendomains start
>> [root@localhost ~]# brctl show
>> bridge name bridge id  STP enabled interfaces
>> tmpbridge  8000.000000000000 no
>
>You can try to look at network-bridge script and figure out what's
>wrong, but IMHO it's better to just create bridges using OS config
>files in RHEL6. An example for KVM (which should also work on xen):
>http://www.techotopia.com/index.php/Creating_an_RHEL_6_KVM_Networked_Bridge_Interface
>. In that example the bridge name is bridge0, but you can change it to
>whatever you want (including xenbr0).
>
>-- 
>Fajar

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2011/11/3 hxkhust <hxkhust@126.com>:
> Thank you for your help.
> /etc/xen/scripts/network-bridge hasn''t been changed since the
xen source
> package is extracted.Someone else install xen successfully without changing
> that script ,according to my observation.Is there something wrong with my
> network device?Or my network driver doesn''t support my network
device
> well?(When the error happen after "launching service xend start",
my network
> connection is also broken.)
> hxk
By the way, if you stop using xend and you migrate to the new XL toolstack, the
network-bridge script is no longer needed.

-- 
Flavio

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oh,yeah~Before i set up the service of xend ,i ifdown the eth0 then everthing is
OK.That''s weird...

hxk

At 2011-11-03 16:36:15,Flavio <fbcyborg@gmail.com>
wrote:
>2011/11/3 hxkhust <hxkhust@126.com>:
>> Thank you for your help.
>> /etc/xen/scripts/network-bridge hasn''t been changed since the
xen source
>> package is extracted.Someone else install xen successfully without
changing
>> that script ,according to my observation.Is there something wrong with
my
>> network device?Or my network driver doesn''t support my network
device
>> well?(When the error happen after "launching service xend
start", my network
>> connection is also broken.)
>> hxk
>By the way, if you stop using xend and you migrate to the new XL toolstack,
the
>network-bridge script is no longer needed.
>
>-- 
>Flavio

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