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Fri Dec 21 17:31:03 EST 2012 

ed to the pool.=20

----- Original Message -----

> From: "Keith Robertson" <kroberts at redhat.com>
> To: "Jonathan Horne" <jhorne at skopos.us>
> Cc: "users" <users at ovirt.org>
> Sent: Tuesday, January 8, 2013 5:15:04 AM
> Subject: Re: [Users] mac address re-use

> On 01/07/2013 05:22 PM, Jonathan Horne wrote:

> > 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.
>=20

> > thanks,
>=20
> > jonathan
>=20

> > 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.
>=20

> > _______________________________________________
>=20
> > Users mailing list Users at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
>=20
> 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.

> Cheers,
> Keith=D7=9F

> [1] http://standards.ieee.org/develop/regauth/oui/public.html

> _______________________________________________
> Users mailing list
> Users at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users

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<html><head><style type=3D'text/css'>p { margin: 0; }</style></head><body><=
div style=3D'font-family: times new roman,new york,times,serif; font-size: =
12pt; color: #000000'>Keith summed things quite right as far as I know (I d=
id not know about the range allocated to Qumranet)<div>From code perspectiv=
e - We have a MacPoolManager infrastructure which holds a pool of Mac addre=
sses, and per deletion of VM, the mac address is returned to the pool.</div=
><div><br></div><div><br><br><hr id=3D"zwchr"><blockquote style=3D"border-l=
eft: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:Helve=
tica,Arial,sans-serif;font-size:12pt;" id=3D"DWT607"><b>From: </b>"Keith Ro=
bertson" &lt;kroberts at redhat.com&gt;<br><b>To: </b>"Jonathan Horne" &lt;jho=
rne at skopos.us&gt;<br><b>Cc: </b>"users" &lt;users at ovirt.org&gt;<br><b>Sent:=
 </b>Tuesday, January 8, 2013 5:15:04 AM<br><b>Subject: </b>Re: [Users] mac=
 address re-use<br><br>
 =20
   =20
 =20
 =20
    <div class=3D"moz-cite-prefix">On 01/07/2013 05:22 PM, Jonathan Horne
      wrote:<br>
    </div>
    <blockquote cite=3D"mid:9BE6F493F83A594DA60C45E6A09DC5AC01709931 at AUSP01=
DAG0201.collaborationhost.net">
     =20
      <div>
        <div>
          <div>my 3.2 install seems to be reusing mac address of
            formerly-deleted guests. &nbsp;is this the normal behavior, and
            or can i turn this off? &nbsp;i would prefer to have a unique m=
ac
            address for each new VM created.</div>
          <div><br>
          </div>
          <div>thanks,</div>
          <div>jonathan</div>
          <div>
          </div>
        </div>
      </div>
      <br>
      <hr>
      <font color=3D"Gray" face=3D"Arial" size=3D"1">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>
      <br>
      <fieldset class=3D"mimeAttachmentHeader"></fieldset>
      <br>
      <pre>_______________________________________________
Users mailing list
<a class=3D"moz-txt-link-abbreviated" href=3D"mailto:Users at ovirt.org" targe=
t=3D"_blank">Users at ovirt.org</a>
<a class=3D"moz-txt-link-freetext" href=3D"http://lists.ovirt.org/mailman/l=
istinfo/users" target=3D"_blank">http://lists.ovirt.org/mailman/listinfo/us=
ers</a>
</pre>
    </blockquote>
    I believe re-use is intentional.&nbsp; I suspect oVirt uses the IEEE [1=
]
    space allocated to Qumranet and that space is relatively small.&nbsp;
    There were previous discussions on the list regarding the
    probability of collisions/exhaustion, IIRC.&nbsp; 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.<br>
    <br>
    Cheers,<br>
    Keith=D7=9F<br><br><br><br>
    <br>
    [1]
   =20
    <a href=3D"http://standards.ieee.org/develop/regauth/oui/public.html" t=
arget=3D"_blank">http://standards.ieee.org/develop/regauth/oui/public.html<=
/a><br>
   =20
 =20

<br>_______________________________________________<br>Users mailing list<b=
r>Users at ovirt.org<br>http://lists.ovirt.org/mailman/listinfo/users<br></blo=
ckquote><br></div></div></body></html>
------=_Part_954104_2040875929.1357625912339--

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