I have a Windows 2012 server in a lab environment connected directly to a Cisco SG200 8 Port Gigabit switch configured for Multicasting.    I have an image that is about 8GB in size that I using to test with.   When I image just a single target machine in unicast it takes about 5 minutes to complete.   I then create a multicast of that same image in the WDS console and try imaging the same  single machine via Multicast but it take 20 minutes to complete.   I also tried this with 7 target machines but the same speed was still just as slow.

The Cisco switch has IGMP snooping enabled and I also tried enabling Multicast Storm Control but still no difference.

Any suggestions as to why the Multicast is SO slow?

Thanks

Adam

Are you still fighting this battle or have you gotten anywhere? Is your WDS servers virtual or physical? If it is virtual, try settings the registry setting TPMaxBandwidth equal to 1.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\WDSServer\Providers\WDSMC\Protocol]

"TpMaxBandwidth"=dword:00000001

-Tony