MDT 2010 Multicast task sequence get stuck

Dear Experts,

I got a trouble with MDT when I do multicast transmission task to deploy OS onto clients.
When I run MDT multicast transmission task, it always stuck at "Attempting multicast transfer" with a little bit percentages (Usually 4% or 6%). I see no traffic go through network interface when monitor. I've tried using direct connection between server and client (using cross-over cable) but nothing change.
Could you please help me pass this step
I'm using Windows server 2008 R2, MDT2010 to deploy Windows 7. I already installed WDS role and WAIK

Thank you all
rvc-itAsked:
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James HaywoodConnect With a Mentor Commented:
Also do you have multicast support turned on within MDT?

This is a good link showing how to test the multicast transmissions from WDS

http://systemscenter.ru/mdt2012.en/opti3usemultwithmdtandthewindser.htm
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James HaywoodCommented:
What are your multicast settings? Are the relevant firewall ports open?
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rvc-itAuthor Commented:
Dear hhaywood000

I'm sorry for may late response. All settings I left they as default, no special settings, I already turn off firewall. I tried connecting server and client directly by using cross-over cable but not thing change.
Thank you for your help
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James HaywoodCommented:
Does the whole system work when just deploying normally without bringing in multicast?
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rvc-itAuthor Commented:
Dear hhaywood000

I'm sorry for my late response. Actually, it cannot work even though deploying normally.
It always stuck at few percents. I have tried installing a new server for testing but it still doesn't work.
I'm going to test deploying Windows 7 32bit to make sure the problem is not come from architecture. I'll update the status for you

Thank you for your help
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James HaywoodCommented:
No problems. Try this in order

WDS only
MDT simple client install
A new install.wim
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rvc-itAuthor Commented:
Dear hhaywood000

I've finished testing as your recommend. I installed a fresh Server and tried from the beginning and have some result
WDS only: worked
MDT simple client install: worked. I can capture image of new installed machine but when I use multicast and it stuck again. Maybe I have a mistake in some step.
I installed Lab as order: Windows Server > Join domain > Windows AIK > DHCP > WDS > MDT then I add Installation source to MDT.
I'll check them again
Thank you for your strong support

Best regards,
RVC-IT
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James HaywoodCommented:
Do your switches support multicast? Is it turned on?
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