mdrabble Posted June 8, 2015 Posted June 8, 2015 Ok, I struggled and I'm about to through my setup through a window and go home in a sulk!! I have HP DL380p GEN 8 running Server 2012 R2 with Hyper-V. I created a Gen2 VM for SCCM 2012 R2 with MDT 2013 installed and for the most part - works fine - except PXE booting is really really slow (30 mins from F12 to SCCM Screen - Boot image is 200MB!) Once at the SCCM deployment screen, pulling down an images and installing packages/updates are fine - it is just the initial PXE boot part that is doing my head in! I've tried changing the TFTP Block size, adding and removing MDT 2013 extentions - and still no joy! I've recreated the Boot Images using copype command and using SCCM to create boot images using MDT. My Hyper-v Virtual Switch is set up NOT to allow Management OS to share the NIC No VLANs are in use Anyone any ideas? I dont really want to scrap SCCM and move back to WDS/MDT for imaging. Cheers
Steve21 Posted June 8, 2015 Posted June 8, 2015 What did you set the TFTP size to? Also have you fully patched it as there were a bunch of hotfixes for slow pxe e.g. https://support.microsoft.com/en-us/kb/2905002 Steve
synaesthesia Posted June 8, 2015 Posted June 8, 2015 (edited) I remember this being an issue with Hyper-V based SCCM servers, one of the very reasons we did ours with ESXi. Edit: seems an update has fixed this, see https://social.technet.microsoft.com/Forums/en-US/4c72ae27-198f-4751-b0d6-340a11b52bd4/insanely-slow-os-download-in-2012-r2-winpe?forum=configmanagerosd Edited June 8, 2015 by synaesthesia
mdrabble Posted June 8, 2015 Author Posted June 8, 2015 What did you set the TFTP size to? Also have you fully patched it as there were a bunch of hotfixes for slow pxe e.g. https://support.microsoft.com/en-us/kb/2905002 Steve Yep - install 502 and the later patch 2910552 and made no difference. Tried different blocksizes from 4096, 8192, 16384 I've just noticed there is a Driver on HP website for Broadcom drivers - dated April 2015 and mentions about Hyper-V and possible VMs dropping network connections.
Steve21 Posted June 8, 2015 Posted June 8, 2015 Yep - install 502 and the later patch 2910552 and made no difference. Tried different blocksizes from 4096, 8192, 16384 I've just noticed there is a Driver on HP website for Broadcom drivers - dated April 2015 and mentions about Hyper-V and possible VMs dropping network connections. Aye that's a driver for the VMQ bug from last year. Did you also do the Window Size? Are you getting the same issues if you try to pxeboot a VM? (Just know when I was reading before there was some issues with Cisco switch settings etc) Steve 1
mdrabble Posted June 8, 2015 Author Posted June 8, 2015 Aye that's a driver for the VMQ bug from last year. Did you also do the Window Size? Are you getting the same issues if you try to pxeboot a VM? (Just know when I was reading before there was some issues with Cisco switch settings etc) Steve Bloody Driver!!! Just installed the driver - rebooted and now PXE boot have taken approx 2 mins!! Why oh why didn't I think about the driver!! Thanks Steve :-) I am one happy chappie!!
markwilfan Posted June 8, 2015 Posted June 8, 2015 literally just about to post about vm queues lol. Glad you sorted it
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