------=_Part_954104_2040875929.1357625912339 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Keith summed things quite right as far as I know (I did not know about the = range allocated to Qumranet)=20
From code perspective - We have a MacPoolManager infrastructure which holds= a pool of Mac addresses, and per deletion of VM, the mac address is return= ed to the pool.=20
----- Original Message -----
From: "Keith Robertson" <kroberts@redhat.com> To: "Jonathan Horne" <jhorne@skopos.us> Cc: "users" <users@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@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@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
------=_Part_954104_2040875929.1357625912339 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <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" <kroberts@redhat.com><br><b>To: </b>"Jonathan Horne" <jho= rne@skopos.us><br><b>Cc: </b>"users" <users@ovirt.org><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@AUSP01= DAG0201.collaborationhost.net"> =20 <div> <div> <div>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 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@ovirt.org" targe= t=3D"_blank">Users@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. 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.<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@ovirt.org<br>http://lists.ovirt.org/mailman/listinfo/users<br></blo= ckquote><br></div></div></body></html> ------=_Part_954104_2040875929.1357625912339--