CentOS - Dec 2018 - KVM Bridge Problem

Hello,
is this only my mistake,or can help any from the list?

I have 3 host computer on different places, but all have the Problem when 
starting a client "KVM" to connect to the bridge from the host.

It is near not possible to start a client, only after 10-20 reboot/restart 
from the client's the network is starting correct?

Is this  only on my computers or have other also this Problem?

Is the bridge software is broken ?

Can I use openvswitch to replace bridge Software?

Any help are welcome ;-)
 
-- 
mit freundliche Gr??en / best regards,

  G?nther J. Niederwimmer

Am 04.12.2018 um 21:30 schrieb G?nther J. Niederwimmer:
> Hello,
> is this only my mistake,or can help any from the list?
> 
> I have 3 host computer on different places, but all have the Problem when
> starting a client "KVM" to connect to the bridge from the host.
> 
> It is near not possible to start a client, only after 10-20 reboot/restart
> from the client's the network is starting correct?
Logs are the only source of truth. Without them everything is pure 
speculation.
> Is this  only on my computers or have other also this Problem?
> 
> Is the bridge software is broken ?
What does your system report in the relevant log files?
> Can I use openvswitch to replace bridge Software?
Sure you can. It takes a bit more effort to setup openvswitch. It can be 
worth it depending on your network design.
> Any help are welcome ;-)
First of all it would be necessary from your side to provide details 
about your setup. Running KVM with a bridge setup is not enough info.

Get your config sorted and the logs.

Alexander

> Am 04.12.2018 um 21:30 schrieb G?nther J. Niederwimmer:
> > Hello,
> > is this only my mistake,or can help any from the list?
> >
> > I have 3 host computer on different places, but all have the Problem
when
> > starting a client "KVM" to connect to the bridge from the
host.
> >
> > It is near not possible to start a client, only after 10-20
> reboot/restart
> > from the client's the network is starting correct?

KVM/Linux bridging often defaults to have spanning tree enabled which many
switches do not like.
Try creating the bridge and disable spanning tree?

Hello List,

thanks for the answer


Am Dienstag, 4. Dezember 2018, 21:59:58 CET schrieb Alexander
Dalloz:
> Am 04.12.2018 um 21:30 schrieb G?nther J. Niederwimmer:
> > Hello,
> > is this only my mistake,or can help any from the list?
> > 
> > I have 3 host computer on different places, but all have the Problem
when
> > starting a client "KVM" to connect to the bridge from the
host.
> > 
> > It is near not possible to start a client, only after 10-20
reboot/restart
> > from the client's the network is starting correct?
> 
> Logs are the only source of truth. Without them everything is pure
> speculation.
this are the Error log
[ INFO ] Network Manager is not active.
[DEPEND] Dependency failed for Network Manager Wait Online.
         Starting LSB: Bring up/down networking...
[FAILED] Failed to start LSB: Bring up/down networking.
See 'systemctl status network.service' for details.

A "systemctl restart network" ends with a error

I mean without NetworkManager I have always this Error in KVM Clients now, 
with Update 1810 ?

I have found a workaround for me in the Momemt.
I enable NetworManager on boot and disable NetworkManager in the ifcfg-ethX 
files

Now the most time the clients are starting with a working Network ??

 
> > Is this  only on my computers or have other also this Problem?
> > 
> > Is the bridge software is broken ?
> 
> What does your system report in the relevant log files?
> 
> > Can I use openvswitch to replace bridge Software?
> 
> Sure you can. It takes a bit more effort to setup openvswitch. It can be
> worth it depending on your network design.
> 
> > Any help are welcome ;-)
> 
> First of all it would be necessary from your side to provide details
> about your setup. Running KVM with a bridge setup is not enough info.
> 
> Get your config sorted and the logs.
> 
> Alexander
> 
> 
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> https://lists.centos.org/mailman/listinfo/centos

-- 
mit freundliche Gr??en / best regards,

  G?nther J. Niederwimmer
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: This is a digitally signed message part.
URL:
<http://lists.centos.org/pipermail/centos/attachments/20181205/87411761/attachment-0001.sig>