I am experiencing issues with multicast transfers in MDT 2012, and for something that is essentially as simple as clicking a checkbox, I am baffled at what else could be going on to cause this.
We are running MDT 2012 on a 2008 R2 server, which is also the home of WDS. Now, multicasting straight from within WDS works fine, but for obvious reasons we need to have this functionality in MDT. The MDT Deployment Shares are established with custom images, setup files, driver support, applications, etc and all of the task sequences work flawlessly. When I enabled multicasting on the DS, I verified that the namespace was in fact created in WDS, however the session never gets created and no clients are able to join. During deployment, "Attempting multicast transfer" appears for a split second before falling back to unicast and completing the rest of the task sequence. Below is what I am seeing in both the BDD.log and LTIApply.log files:
------ Applying Windows image using Setup.exe ------ LTIApply 8/8/2012 2:10:56 PM 0 (0x0000)
Multicast transfer to directory: C:\MININT\Operating Systems\Win7x64_CI_8-7-12 LTIApply 8/8/2012 2:10:56 PM 0 (0x0000)
<Message containing password has been suppressed> LTIApply 8/8/2012 2:10:56 PM 0 (0x0000)
Command has been started (process ID 1412) LTIApply 8/8/2012 2:10:56 PM 0 (0x0000)
Console >
LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Console > Transfer Failed. [0x80070523]. LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Return code from command = -2147023581 LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Multicast transfer could not be completed, rc = -2147023581, falling back to using %DEPLOYROOT%\Operating Systems\Win7x64_CI_8-7-12\Win7x64_CI_8-7-12.wim LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
LTI applying image %DEPLOYROOT%\Operating Systems\Win7x64_CI_8-7-12\Win7x64_CI_8-7-12.wim using SETUP.EXE LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Unable to find SETUP, use imagex.exe as a backup. LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
------ Applying Windows image using ImageX.exe ------ LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
LTI applying image %DEPLOYROOT%\Operating Systems\Win7x64_CI_8-7-12\Win7x64_CI_8-7-12.wim using ImageX LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Property SourcePath is now = %DEPLOYROOT%\Operating Systems\Win7x64_CI_8-7-12 LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Multicast transfer to directory: C:\MININT\Operating Systems\Win7x64_CI_8-7-12 LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
<Message containing password has been suppressed> LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Command has been started (process ID 1468) LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Console >
LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Console > Transfer Failed. [0x80070523]. LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Return code from command = -2147023581 LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
Multicast transfer could not be completed, rc = -2147023581, falling back to using %DEPLOYROOT%\Operating Systems\Win7x64_CI_8-7-12\Win7x64_CI_8-7-12.wim LTIApply 8/8/2012 2:10:57 PM 0 (0x0000)
I've replaced the server name and share path with %DEPLOYROOT% in the log excerpt above, but in the actual log it has the correct path listed. This same error is being returned for each task sequence, on each Deployment Share. I have tried recreating a Deployment Share and enabling multicast transfer, but this yielded the same results, and I never see any clients in the WDS console.
What's strange is that we had this working when we temporarily tested it last year with MDT 2010, but we had decided not to implement it yet to due network restrictions. We are utilizing 802.1x port level authentication, however the systems are on forced auth ports and IGMP snooping is permitting on all devices between the clients and the MDT server. Like I said, multicasting works fine when deploying an image from WDS so this leads me to believe the issue is not network related.
I've searched countless hours on the issue, error codes, or similar symptoms and haven't found anything that solves my problem. We are gearing up for our large deployment of 1500+ systems and we really need to get this working. Any help is appreciated!!