Yeah well I can tell you that this 11 year MVP is certainly not omnipotent... 
the title was never meant to convey one who knows everything, but rather one 
that was recognized as helping the community.

I seriously do want to see the quoted reference though as he puts forth just 
what we all need to keep handy...

Ed Aldrich | Solutions Engineer
1E | Empowering Efficient IT
Mobile: (401) 924-2293
[email protected]<mailto:[email protected]> | www.1e.com<http://www.1e.com/>
[Description: Description: cid:[email protected]] Ent Cli Mgmt 
(2003-2014)
Please consider the environment before printing this e-mail

From: [email protected] [mailto:[email protected]] On 
Behalf Of Marcum, John
Sent: Friday, September 19, 2014 11:43 AM
To: [email protected]
Subject: RE: [mssms] ConfigMgr 2012 R2 OSD + PXE :: IP Helper vs. DHCP Options

Now Ed... You are an MVP surely you have access to that? Actually it's my 
understanding that once you reach the 10 year mark Microsoft implants all the 
50,000 + pages of docs into your brain so that you have instant recall 
abilities. Have you not had that done yet?

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of Ed Aldrich
Sent: Friday, September 19, 2014 10:39 AM
To: [email protected]<mailto:[email protected]>
Subject: RE: [mssms] ConfigMgr 2012 R2 OSD + PXE :: IP Helper vs. DHCP Options

Pls pass on the source link, Jason.

Ed Aldrich | Solutions Engineer
1E | Empowering Efficient IT
Mobile: (401) 924-2293
[email protected]<mailto:[email protected]> | www.1e.com<http://www.1e.com/>
[Description: Description: cid:[email protected]] Ent Cli Mgmt 
(2003-2014)
Please consider the environment before printing this e-mail

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of Jason Wallace
Sent: Friday, September 19, 2014 11:10 AM
To: [email protected]<mailto:[email protected]>
Subject: RE: [mssms] ConfigMgr 2012 R2 OSD + PXE :: IP Helper vs. DHCP Options

John

Thank you for correcting me on the support level of DHCP options.

I suspect John that as an MVP you will have access to the documentation which 
states

"Furthermore the use of DHCP Options to control PXE requests in Configuration 
Manager 2012 is not supported by Microsoft. Therefore the recommended and 
supported method of PXE booting client PCs that are on a different subnet than 
the DHCP or WDS/PXE Service Point servers is the use of IP Helpers."
I happened to be reviewing the document yesterday and the words "not supported 
by Microsoft" struck me

I suppose that you could argue that were you to have an environment running WDS 
on Server 2008 where you never had any UEFI involvement then yes, Microsoft 
would support you.  I am quite sure that regardless of the above I am sure that 
you would still be supported since we all know that "not supported" actually 
means "not tested"

Jason
________________________________
From: [email protected]<mailto:[email protected]>
To: [email protected]<mailto:[email protected]>
Subject: RE: [mssms] ConfigMgr 2012 R2 OSD + PXE :: IP Helper vs. DHCP Options
Date: Fri, 19 Sep 2014 14:18:24 +0000

Supported or not supported (by Microsoft) doesn't really matter here though 
because Microsoft products have nothing to do with most of the PXE process - 
it's almost entirely in the hands of the NIC to do the right thing. If 
something truly breaks down, it's either the NIC's fault or the network's. The 
DHCP server can play a small role here, but ultimately, that role is truly 
insignificant as it's still up to the NIC to determine what to do and then to 
do it. If the NIC does the wrong thing, there is no way to really troubleshoot 
it either and your only real recourse is to call the NIC vendor. There are NICs 
out there that some of us have encountered that simply refuse to do the right 
thing - these are pretty rare now days, but they do exist. With iphelpers, you 
simply have to watch the traffic if something weird is going on because it's 
not up to the NIC anymore.



Experience has shown that iphelpers simply work better and as pointed out, with 
UEFI and architecture restrictions, DHCP cannot get the job done because it can 
only handle a single architecture.



J



From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of Marcum, John
Sent: Friday, September 19, 2014 7:13 AM
To: [email protected]<mailto:[email protected]>
Subject: RE: [mssms] ConfigMgr 2012 R2 OSD + PXE :: IP Helper vs. DHCP Options



DHCP options are supported.



From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of Jason Wallace
Sent: Thursday, September 18, 2014 6:20 PM
To: [email protected]<mailto:[email protected]>
Subject: Re: [mssms] ConfigMgr 2012 R2 OSD + PXE :: IP Helper vs. DHCP Options



IP helpers is supported and recommended. DHCP is not and is not

On 19 Sep 2014, at 00:14, Trevor Sullivan 
<[email protected]<mailto:[email protected]>> wrote:

Over the past years that I have worked with Configuration Manager, I have 
learned to use IP helpers instead of DHCP options, to point client systems to a 
Windows Deployment Services (WDS) / PXE service. I have personally experienced 
multiple instances at customer sites, just over the past year, where DHCP 
options have simply not worked as expected, and caused erroneous error messages 
during PXE boot. As soon as we implement IP helpers, everything "just works."



I am interested in gathering feedback from people on this mailing list to 
confirm or deny my current understanding on this topic. Do you use DHCP options 
or IP helper to point clients to the WDS/PXE service? Have you had a negative 
experience using one or the other?



Cheers,

Trevor Sullivan

Microsoft PowerShell MVP

<image001.png><http://mms.mnscug.org/>







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