<div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div><div>Hello Cam,<br><br></div>The problem you described seems to be similar to the described in <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1242227" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=1242227</a>.<br>The mentioned bug was fixed in one of the recent oVirt builds.<br></div>The updated Ovirt code allows to mix networks (regardless of them being VM or non-VM) on a single NIC with the following conditions:<br><ul><li>not more than one non-VLAN network in conjunction with any number of VLANs<br></li><li>MTU of the VLAN networks have to be equal to that of a non-VLAN one if such exists<br></li></ul><div>So I'd advise you to update you oVirt to the latest build.<br><br></div><div>Regards,<br></div><div>Yevgeny<br></div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Oct 6, 2015 at 2:47 AM, Cam Wright <span dir="ltr"><<a href="mailto:cwright@cuttingedge.com.au" target="_blank">cwright@cuttingedge.com.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I've just started building an oVirt farm as a replacement for our<br>
existing infrastructure and I'm having issues configuring multiple<br>
VLAN bridges with different MTUs.<br>
<br>
When I try to add a logical network with a VLAN tag + VM Network + MTU<br>
9000 to a bonded interface on my host with only the ovirtmgmt network<br>
(MTU 1500, default) it throws up an error message and won't let me<br>
continue, error message below:<br>
<br>
Cannot setup Networks. The following Logical Networks do not have the<br>
same MTU value: ovirtmgmt(default),<br>
net_bne_vlan10(9000).<br>
<br>
Eventually, I will want to add more logical networks with the default<br>
MTU, so setting the ovirtmgmt MTU to 9000 is unfortunately not going<br>
to solve my issue.<br>
<br>
This is something I can do in vanilla Linux networking where I set the<br>
802.3ad bond to be MTU 9000 and configure two different bridges off<br>
that interface to 1500 and 9000, however this does not seem to be<br>
possible in the oVirt web interface.<br>
<br>
I've dug through the Administration guide and feature requests and<br>
there doesn't seem to be anything there around using different MTU<br>
values for different logical networks.<br>
<br>
Has anyone been able to successfully do this? The<br>
/etc/sysconfig/network-scripts and /var/lib/vdsm/persistence/netconf<br>
files seem to get rewritten whenever the vdsm service does anything,<br>
so I'm reluctant to edit them manually.<br>
<br>
The hosts were built using the hosted-engine installer on Fedora 22.<br>
The engine is running Fedora 22 also, see below:<br>
<br>
[root@bne-ovirtengine01 ~]# cat /etc/redhat-release<br>
Fedora release 22 (Twenty Two)<br>
[root@bne-ovirtengine01 ~]# uname -r<br>
4.0.4-301.fc22.x86_64<br>
<br>
oVirt Engine Version: 3.6.0-1.fc22<br>
<br>
Any assistance would be appreciated.<br>
<br>
Cam Wright | Systems Administrator<br>
CUTTINGEDGE<br>
90 Victoria St, West End, Brisbane, QLD, 4101<br>
T <a href="tel:%2B61%207%203013%206222" value="+61730136222" target="_blank">+61 7 3013 6222</a><br>
E <a href="mailto:cwright@cuttingedge.com.au" target="_blank">cwright@cuttingedge.com.au</a> | W <a href="http://www.cuttingedge.com.au" rel="noreferrer" target="_blank">www.cuttingedge.com.au</a><br>
<br>
/SYD /BNE /MEL /TYO<br>
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</blockquote></div><br></div>
</div></div></div><br></div>