<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000'>You can always set a new range of mac addresses using -<div><br></div><div><div>engine-config -g MacPoolRanges (to see the current range)</div><div><br></div><div>and then engine-config -s MacPoolRanges=<new range></div><div><br></div><div><br></div><div><br></div><br><hr id="zwchr"><blockquote style="border-left:2px solid rgb(16, 16, 255);margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Karli Sjöberg" <Karli.Sjoberg@slu.se><br><b>To: </b>"Yair Zaslavsky" <yzaslavs@redhat.com><br><b>Cc: </b>"Keith Robertson" <kroberts@redhat.com>, "users" <users@ovirt.org><br><b>Sent: </b>Tuesday, January 8, 2013 8:29:49 AM<br><b>Subject: </b>Re: [Users] mac address re-use<br><br>
tis 2013-01-08 klockan 01:18 -0500 skrev Yair Zaslavsky:
<blockquote><font color="#000000">Keith summed things quite right as far as I know (I did not know about the range allocated to Qumranet)</font>
</blockquote>
<blockquote><font color="#000000">From code perspective - We have a MacPoolManager infrastructure which holds a pool of Mac addresses, and per deletion of VM, the mac address is returned to the pool.</font><br>
</blockquote>
Which means that if you set up two oVirt systems independantly; one for production and one for testing, you will get collisions?<br>
<br>
/Karli<br>
<br>
<blockquote><br>
<br>
</blockquote>
<blockquote><br>
<br>
<hr align="center">
<br>
<blockquote><b><font color="#000000">From: </font></b><font color="#000000">"Keith Robertson" <kroberts@redhat.com></font><br>
<b><font color="#000000">To: </font></b><font color="#000000">"Jonathan Horne" <jhorne@skopos.us></font><br>
<b><font color="#000000">Cc: </font></b><font color="#000000">"users" <users@ovirt.org></font><br>
<b><font color="#000000">Sent: </font></b><font color="#000000">Tuesday, January 8, 2013 5:15:04 AM</font><br>
<b><font color="#000000">Subject: </font></b><font color="#000000">Re: [Users] mac address re-use</font><br>
<br>
</blockquote>
</blockquote>
<blockquote>
<blockquote><font color="#000000">On 01/07/2013 05:22 PM, Jonathan Horne wrote:</font><br>
<br>
</blockquote>
</blockquote>
<blockquote>
<blockquote>
<blockquote><font color="#000000">my 3.2 install seems to be reusing mac address of formerly-deleted guests. is this the normal behavior, and or can i turn this off? i would prefer to have a unique mac address for each new VM created.</font>
</blockquote>
</blockquote>
</blockquote>
<blockquote>
<blockquote>
<blockquote><br>
<br>
</blockquote>
</blockquote>
</blockquote>
<blockquote>
<blockquote>
<blockquote><font color="#000000">thanks,</font> </blockquote>
</blockquote>
</blockquote>
<blockquote>
<blockquote>
<blockquote><font color="#000000">jonathan</font> </blockquote>
</blockquote>
</blockquote>
<blockquote>
<blockquote>
<blockquote><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote>
<blockquote>
<blockquote><br>
<hr align="center">
<br>
<font size="1"><font color="#bebebe">This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind
SKOPOS to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose.</font></font><font color="#000000">
</font><br>
<br>
<pre><font color="#000000">_______________________________________________</font>
<font color="#000000">Users mailing list</font>
<font color="#000000"><a href="mailto:Users@ovirt.org" target="_blank">Users@ovirt.org</a></font>
<font color="#000000"><a href="http://lists.ovirt.org/mailman/listinfo/users" target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a></font>
</pre>
</blockquote>
<font color="#000000">I believe re-use is intentional. I suspect oVirt uses the IEEE [1] space allocated to Qumranet and that space is relatively small. There were previous discussions on the list regarding the probability of collisions/exhaustion, IIRC.
In any case, you want re-use to prevent the possibility of exhaustion and because a program shouldn't just go randomly creating addresses from any available OUI block.</font><br>
<br>
<font color="#000000">Cheers,</font><br>
<font color="#000000">Keithן</font><br>
<br>
<br>
<br>
<br>
<font color="#000000">[1] <a href="http://standards.ieee.org/develop/regauth/oui/public.html" target="_blank">
http://standards.ieee.org/develop/regauth/oui/public.html</a></font><br>
<br>
<font color="#000000">_______________________________________________</font><br>
<font color="#000000">Users mailing list</font><br>
<font color="#000000">Users@ovirt.org</font><br>
<font color="#000000">http://lists.ovirt.org/mailman/listinfo/users</font><br>
</blockquote>
<br>
<br>
</blockquote>
<br>
</blockquote><br></div></div></body></html>