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wim image transfer via multicast is not happening


So checked all logs as per: https://technet.microsoft.com/en-us/library/bb932135.aspx


MCS is enabled - had to re-install it, as per



Image is multicast enabled:




But I am sure image is NOT delivered via multicast (definitely there is no multicast mentioned on client screen). smsts.log has multicast location mention, and not a single fail or error


None of the logs involved have any error apart from:



Looking for: S:\SCCMContentLib\DataLib\SP1000B7*
Failed to find the package.

The package (image) got fully re-distributed, it definitely EXISTS in S:\SCCMContentLib\DataLib




If I enable in (test) image properties to ONLY deliver the image via multicast then (test) TS fails instantly on Apply OS, but with NOT a single mention of fail in the smsts.log

SP1000E0 content location: mcs://SP-V-SCCM.domain.local/SMS_MCS/.sms_mcs?filePath=https://SP-V-SCCM.domain.local/SMS_DP_SMSPKG$/SP1000E0&PackageFlags=135266336&packageID=SP1000E0&version=2
SP1000E0 http content location: https://SP-V-SCCM.domain.local/NOCERT_SMS_DP_SMSPKG$/SP1000E0
SP1000E0 multicast content location: mcs://SP-V-SCCM.domain.local/SMS_MCS/.sms_mcs?filePath=https://SP-V-SCCM.domain.local/SMS_DP_SMSPKG$/SP1000E0&PackageFlags=135266336&packageID=SP1000E0&version=2

and MCSIsapi.log shows:

HealthCheckRequest::HandleMessage failed with errorcode (0x80004005)    McsIsapi    27/01/2016 03:21:03    4280 (0x10B8)
Failed to process HEALTHCHECK request for client ffffffff-ffff-ffff-ffff-ffffffffffff    McsIsapi    27/01/2016 03:21:03    4280 (0x10B8)
MCSRequestHandler::HandleMessage for Op HEALTHCHECK failed with server errorcode 2052    McsIsapi    27/01/2016 03:21:03    4280 (0x10B8)
Looking for: S:\SCCMContentLib\DataLib\SP1000E0*
Failed to find the package.

But the package is definitely there!



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After weeks of poking around, it might have been the issue of rights


Added computername\IIS_IUSRS to NTFS permissions of ?:\SCCMContentLib & it seems that mcsexec.log shows

========== OpenSession
Found existing Namespace[0]=https://sccmserver.domain.local/SMS_DP_SMSPKG$/SP1000B7 Type=1
Loading namespace: https://sccmserver.domain.local/SMS_DP_SMSPKG$/SP1000B7
Got path: S:\SCCMContentLib\DataLib\SP1000B7.10
Got UNC path: https:\\sccmserver.domain.local\SMS_DP_SMSPKG$\SP1000B7
Got key:
Got algoID: 0x6603
Got packageID: SP1000B7
Adding package namespace: https://sccmserver.domain.local/SMS_DP_SMSPKG$/SP1000B7
========== OpenSession -- exit code: 0x0
========== HashAndSignBuffer
Found package https://sccmserver.domain.local/SMS_DP_SMSPKG$/SP1000B7
Package files exist for: S:\SCCMContentLib\DataLib\SP1000B7.10
Adding package namespace: https://sccmserver.domain.local/SMS_DP_SMSPKG$/SP1000B7
Found existing Namespace[0]=https://sccmserver.domain.local/SMS_DP_SMSPKG$/SP1000B7 Type=1
========== HealthCheck ffffffff-ffff-ffff-ffff-ffffffffffff
Got MCS Certificates
Health check was succesful
========== HashAndSignBuffer

But the speed of transfer of the .wim from https://sccmserver.domain.local/SMS_DP_SMSPKG$/SP1000B7

is beyond tragic! It was way faster to pull the image from DP directly


Any idea why it is so slow?


Unicast 3 PCs download 13Gb wim takes ~ 10 min, same image over multicast takes 90 min with default values on 1Gb switched network



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I made few changes to:




ApBlockSizeV4 = 1385

TpMulticastTTL = 5

TpMaxBandwidth = 10


and 13 Gb is now 25 min (still way too long)


But that comes from Hyper-V VM, so there might be some extra settings required elsewhere (anybody knows?)



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