[EXTERNAL] Re: [edk2-devel] NetworkPkg: Unexpected DHCP RELEASE after PXE server reply on IPv6

Tue Jun 29 17:33:42 UTC 2021

FYI
For IPv6, the TFTP-based network boot process (i.e., pxe) is called Netboot6 & detailed in "24.3.1 Netboot6"/" 24.3.1.2 IPv6-based PXE boot", and for IPV4 PXE we also curate changes/clarifications in "E.4.20 PXE 2.1 specification wire protocol clarifications", all of which are found in https://uefi.org/sites/default/files/resources/UEFI_Spec_2_9_2021_03_18.pdf since http://www.pix.net/software/pxeboot/archive/pxespec.pdf<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pix.net%2Fsoftware%2Fpxeboot%2Farchive%2Fpxespec.pdf&data=04%7C01%7CBret.Barkelew%40microsoft.com%7C6ba252758f3d4ef4eb2208d93b1c8cf8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637605816087554815%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Lb7ELKglF3Y%2Fdeg5aNdrt8WTPSpytI2kF%2FGm6CNTolQ%3D&reserved=0> is frozen/unmaintained at this point.

Vincent

From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Bret Barkelew via groups.io
Sent: Tuesday, June 29, 2021 9:54 AM
To: devel at edk2.groups.io; maciej.rabeda at linux.intel.com; LathaKannan Arumugam <larumugam at microsoft.com>
Subject: Re: [EXTERNAL] Re: [edk2-devel] NetworkPkg: Unexpected DHCP RELEASE after PXE server reply on IPv6

Thanks, Maciej! We'll investigate!

- Bret
________________________________
From: Rabeda, Maciej <maciej.rabeda at linux.intel.com<mailto:maciej.rabeda at linux.intel.com>>
Sent: Tuesday, June 29, 2021 9:39:59 AM
To: devel at edk2.groups.io<mailto:devel at edk2.groups.io> <devel at edk2.groups.io<mailto:devel at edk2.groups.io>>; LathaKannan Arumugam <larumugam at microsoft.com<mailto:larumugam at microsoft.com>>; Bret Barkelew <Bret.Barkelew at microsoft.com<mailto:Bret.Barkelew at microsoft.com>>
Subject: Re: [EXTERNAL] Re: [edk2-devel] NetworkPkg: Unexpected DHCP RELEASE after PXE server reply on IPv6

Additionally, for claim that IPv4 does not do that, please provide Wireshark trace, if available.
On 29-Jun-21 18:36, Maciej Rabeda wrote:
Hi guys,

Finally got some time to look into it.

Long story short, this smells like infrastructure problem.
SARR passes over 546/547 port pair. That is between UEFI PXE client and DHCP server (even if it is the same machine).
The next packet is essentially a Boot Server choice step. UEFI PXE client sends a unicast discovery packet towards Boot server (same machine, same address) coded as DHCP Request.
The release packet is a direct reaction to 3 second timeout (see time diff between packet 9 and 11).

See section 2.2.1 in PXE spec: http://www.pix.net/software/pxeboot/archive/pxespec.pdf<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pix.net%2Fsoftware%2Fpxeboot%2Farchive%2Fpxespec.pdf&data=04%7C01%7CBret.Barkelew%40microsoft.com%7C6ba252758f3d4ef4eb2208d93b1c8cf8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637605816087554815%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Lb7ELKglF3Y%2Fdeg5aNdrt8WTPSpytI2kF%2FGm6CNTolQ%3D&reserved=0>

Please verify that your WDS service is running correctly, since clearly there is no reaction to that packet from Boot server.

[cid:image001.png at 01D76CD2.39FA0EA0]
On 28-Jun-21 22:05, LathaKannan Arumugam via groups.io wrote:
Can you please help us on this issues?
Get Outlook for Android<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Faka.ms%2FAAb9ysg&data=04%7C01%7CBret.Barkelew%40microsoft.com%7C6ba252758f3d4ef4eb2208d93b1c8cf8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637605816087564776%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=7z98WyQ%2BYboLv47ti6v2Fe2iZbOWzuCJAVo0uYD4R7Q%3D&reserved=0>
________________________________
From: devel at edk2.groups.io<mailto:devel at edk2.groups.io> <devel at edk2.groups.io><mailto:devel at edk2.groups.io> on behalf of LathaKannan Arumugam via groups.io <larumugam=microsoft.com at groups.io><mailto:larumugam=microsoft.com at groups.io>
Sent: Friday, June 25, 2021 1:11:42 PM
To: Bret Barkelew <Bret.Barkelew at microsoft.com><mailto:Bret.Barkelew at microsoft.com>; Rabeda, Maciej <maciej.rabeda at linux.intel.com><mailto:maciej.rabeda at linux.intel.com>; devel at edk2.groups.io<mailto:devel at edk2.groups.io> <devel at edk2.groups.io><mailto:devel at edk2.groups.io>
Subject: Re: [EXTERNAL] Re: [edk2-devel] NetworkPkg: Unexpected DHCP RELEASE after PXE server reply on IPv6

Any inputs?

We kind of blocked on this for a week.  Kindly look into packet capture and suggest a path forward.

From: LathaKannan Arumugam
Sent: Friday, June 25, 2021 9:23 AM
To: Bret Barkelew <Bret.Barkelew at microsoft.com><mailto:Bret.Barkelew at microsoft.com>; Rabeda, Maciej <maciej.rabeda at linux.intel.com><mailto:maciej.rabeda at linux.intel.com>; devel at edk2.groups.io<mailto:devel at edk2.groups.io>
Subject: RE: [EXTERNAL] Re: [edk2-devel] NetworkPkg: Unexpected DHCP RELEASE after PXE server reply on IPv6

Attached packet captured from server.

From: Bret Barkelew <Bret.Barkelew at microsoft.com<mailto:Bret.Barkelew at microsoft.com>>
Sent: Friday, June 25, 2021 9:19 AM
To: Rabeda, Maciej <maciej.rabeda at linux.intel.com<mailto:maciej.rabeda at linux.intel.com>>; devel at edk2.groups.io<mailto:devel at edk2.groups.io>; LathaKannan Arumugam <larumugam at microsoft.com<mailto:larumugam at microsoft.com>>
Subject: Re: [EXTERNAL] Re: [edk2-devel] NetworkPkg: Unexpected DHCP RELEASE after PXE server reply on IPv6

+ @LathaKannan Arumugam<mailto:larumugam at microsoft.com>

- Bret

________________________________

From: Rabeda, Maciej <maciej.rabeda at linux.intel.com<mailto:maciej.rabeda at linux.intel.com>>
Sent: Friday, June 25, 2021 7:40:16 AM
To: devel at edk2.groups.io<mailto:devel at edk2.groups.io> <devel at edk2.groups.io<mailto:devel at edk2.groups.io>>; Bret Barkelew <Bret.Barkelew at microsoft.com<mailto:Bret.Barkelew at microsoft.com>>; Bret Barkelew <Bret.Barkelew at microsoft.com<mailto:Bret.Barkelew at microsoft.com>>
Subject: [EXTERNAL] Re: [edk2-devel] NetworkPkg: Unexpected DHCP RELEASE after PXE server reply on IPv6

Looking at it. Any chance to get Wireshark trace for this scenario?

On 25-Jun-21 09:25, brbarkel via groups.io wrote:

Just poking this to see if anyone has any ideas. Thanks!

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