We're on Server 2008 R2 and I just installed R2 on our SCCM SP2 installation yesterday. I set up multicasting as per instructions here http://blogs.msdn.com/steverac/archive/2008/10/19/setting-up-multicasting-in-sccm.aspx When I deploy the OS and it gets to downloading the image, it says it's setting up a multicast connection, but then it reverts to unicast and downloads the image via unicast. smsts.log has the following errors: Encountered error transfering file (0x800706BA). ApplyOperatingSystem 13/01/2010 4:35:11 PM 1536 (0x0600) Received error: 0x8004080b while initiating multicast download ApplyOperatingSystem 13/01/2010 4:35:11 PM 1536 (0x0600) Appreciate any help.

Hi, You installed R2 after SP2 has been patched? I'd like to suggest you re-apply SCCM SP2 on your SCCM site server.

My upgrade path was SCCM 2007 RTM to SCCM SP2 to SCCM R2 Here are the supported upgrade paths. Looks like my upgrade path was fine.. SCCM SP2 upgrade path http://technet.microsoft.com/en-us/library/ee344146.aspx SCCM R2 installation path http://technet.microsoft.com/en-us/library/cc161851.aspx

In the DP properies set static IP addresses for MC 224.0.0.1 to 224.0.0.255Also check your switches to make sure IGMP snooping is turned on and that there is no broadcast/multicasr supression turned on. On 3com switches at least this is always an issueTry that restart WDS and see what happensRobbie

Active or passive snooping?

In the DP properies set static IP addresses for MC 224.0.0.1 to 224.0.0.255 Also check your switches to make sure IGMP snooping is turned on and that there is no broadcast/multicasr supression turned on. On 3com switches at least this is always an issue Try that restart WDS and see what happens Robbie Ok I've tried setting the static IP addresses and made sure our switches have IGMP snooping on. We are not suppressing multicast. The same error happens. Here's a part of the log file where it attempts to send the image file via multicast but then fails and sends via unicast instead. SMSTS.LOG Download: Server=SERVER Namespace=//SERVER.DOMAIN/SMSPKGI$/SSN00043 RemoteObject=\\SERVER.DOMAIN\SMSPKGI$\SSN00043\ LocalObject=C:\_SMSTaskSequence\Packages\SSN00043.{A0D7BCFB-C09F-4D24-B3CA-74DC3637BABE} ApplyOperatingSystem 28/01/2010 2:00:56 PM 1556 (0x0614) Checking volume for sparse files: C:\ ApplyOperatingSystem 28/01/2010 2:00:56 PM 1556 (0x0614) Volume supports sparse files: TRUE ApplyOperatingSystem 28/01/2010 2:00:56 PM 1556 (0x0614) [SparseFile] ApplyOperatingSystem 28/01/2010 2:00:56 PM 1556 (0x0614) Token before WdsTransportClientStartSession ApplyOperatingSystem 28/01/2010 2:00:56 PM 1556 (0x0614) Token is for User: NT AUTHORITY\SYSTEM ApplyOperatingSystem 28/01/2010 2:00:56 PM 1556 (0x0614) ThreadId: 0x614 User: NT AUTHORITY\SYSTEM ApplyOperatingSystem 28/01/2010 2:00:56 PM 1556 (0x0614) [Callback:SessionComplete:0x6ba] ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) WdsTransportClientStartSession(m_hDownload), HRESULT=800706ba (e:\nts_sms_fre\sms\server\mcs\consumer\mcdownload.cpp,182) ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) pDownload->Download(pwszServer, pwszNamespace, pwszRemoteObject, pwszLocalObject, uCacheSize), HRESULT=800706ba (e:\nts_sms_fre\sms\server\mcs\consumer\mcclient.cpp,120) ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Encountered error transfering file (0x800706BA). ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Sending status message: SMS_OSDeployment_PackageDownloadMulticastStatusFail ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Sending StatusMessage ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Formatted header: ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) 3c0c051e-4fb9-425e-a092-3033157978a7mp:[http]MP_StatusManagerdirect:OSD336002010-01-28T03:31:03ZhttpStatusReceiverSync ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) CLibSMSMessageWinHttpTransport::Send: URL: SERVER.DOMAIN:80 CCM_POST /ccm_system/request ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) The request has succeeded. 200 OK ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) McsTransferDirectory(sHost.c_str(), sFilename.c_str(), sPackageID.c_str(), sVersion.c_str(), pwszLocalDirectory, pbEncrypt, fpProgressCallback, pvProgressCallbackData, hCancelEvent), HRESULT=8004080b (e:\nts_sms_fre\sms\server\mcs\consumer\mcsisapiclient.cpp,1104) ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) g_pfnMcsTransferDirectoryByURL(pwszMcsServer, pwszLocalDirectory, pbEncrypt, fpProgressCallback, pvProgressCallbackData, hCancelEvent), HRESULT=8004080b (e:\nts_sms_fre\sms\framework\tscore\multicast.cpp,261) ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) McsTransferDirectoryByURL(sSourceURL, sDestinationPath, pbEncrypt, Multicast_Progress, 0, 0), HRESULT=8004080b (e:\nts_sms_fre\sms\framework\tscore\resolvesource.cpp,2594) ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Received error: 0x8004080b while initiating multicast download ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Tried all the available multicast based locations. HTTP based locations will be attempted now. ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) GetDirectoryListing() entered ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Initializing HTTP transport. ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Setting URL = http://SERVER.DOMAIN/SMS_DP_SMSPKGI$/SSN00043/. ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Address = SERVER.DOMAIN, Object = /SMS_DP_SMSPKGI$/SSN00043/, Port = 80. ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) WinHttp credentials set ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) CLibSMSMessageWinHttpTransport::Send: URL: SERVER.DOMAIN:80 PROPFIND /SMS_DP_SMSPKGI$/SSN00043/ ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Error. Status code 207 returned ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) List of files to be downloaded ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Directory: http://SERVER.DOMAIN:80/SMS_DP_SMSPKGI%24/SSN00043/ ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) File: http://SERVER.DOMAIN:80/SMS_DP_SMSPKGI%24/SSN00043/Win7Entx64.WIM ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) GetDirectoryListing() successfully completed ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Succeeded loading resource DLL 'X:\sms\bin\x64\1033\TSRES.DLL' ApplyOperatingSystem 28/01/2010 2:01:03 PM 1556 (0x0614) Executing command line: X:\WINDOWS\system32\cmd.exe /k TSBootShell 28/01/2010 2:04:30 PM 788 (0x0314) The command completed successfully. TSBootShell 28/01/2010 2:04:30 PM 788 (0x0314) Successfully launched command shell. TSBootShell 28/01/2010 2:04:30 PM 788 (0x0314) Downloaded file from http://SERVER.DOMAIN:80/SMS_DP_SMSPKGI%24/SSN00043/Win7Entx64.WIM to C:\_SMSTaskSequence\Packages\SSN00043\Win7Entx64.WIM ApplyOperatingSystem 28/01/2010 2:05:03 PM 1556 (0x0614) Download done setting progress bar to 100 ApplyOperatingSystem 28/01/2010 2:05:03 PM 1556 (0x0614) Content successfully downloaded at C:\_SMSTaskSequence\Packages\SSN00043 ApplyOperatingSystem 28/01/2010 2:05:22 PM 1556 (0x0614)

Does ghostcast work by any chance?One thing to look at is this "=//SERVER.DOMAIN" are you sure thats correct? If it isnt setup an SLP roleWhat you also need to do is the following for multicast 1) set igmp snooping on ALL your layer 2 switches2) enable igmp on your layer 3 switches with ideally your DP plugged into one3) enable igmp querier status on one of your layer 3 switches ideally the one with the DP plugged in(on most switches you must do this via telnet especially 3com)4) if your running a non flat network i.e. you have lots of vlans you will need to do enable PIM as well pim dense or sparse cant remember whichRobbie

"=//SERVER.DOMAIN" -- I substituted the server and domain names with this when posting the log, sorry should have mentioned. Thanks again, I'll check up on these things and report back.

Multicasting is now working. There were two problems revealed by packet tracing: multicasting was working when server and client were on the same subnet. We found that sccm multicasting was sending packets as IPv6. Our networks are only routing IPv4. We turned IPv6 off on our sccm server. It still wasn't working across subnets. Our sccm server was not being resolved properly. We edited our boot image and added our sccm server to the hosts file. All good now :) Thanks for the suggestions.

How did you disabled the IPv6 in this instance? What steps did you take.Find this post helpful? Does this post answer your question? Be sure to mark it appropriately to help others find answers to their searches.

We disabled IPv6 on our Site Systems just by going into Local Area Connection Properties and unticking IPv6.

Hi, If i understood, to make it work accross vlan, you just put in hosts file in your boot image something like "xxx.xxx.xxx.xxx server_name.domain" ?? I've done this but still experiencing multicast error. My clients open the multicast session but download won't start and in the smsts.log i can see the error you had: "Encountered error transfering file (0x800705B4). ApplyOperatingSystem 11/03/2011 15:35:36 1652 (0x0674) Received error: 0x8004080b while initiating multicast download ApplyOperatingSystem 11/03/2011 15:35:36 1652 (0x0674)" I'm stuck now, it works well on the same subnet that's ok. The network team looking at the switch and router configuration. Hope they will find an answer cause there's not a lot of posts on this error on the web...