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Thread-Topic: reg: MAC address could not change on pre-boot environment and failed to PXE boot. 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boundary="_000_PH0PR11MB4773C3FEC4DED8FECDDA3DE9F9849PH0PR11MB4773namp_" --_000_PH0PR11MB4773C3FEC4DED8FECDDA3DE9F9849PH0PR11MB4773namp_ Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Hi Nainar, 1. Snp->StationAddress() calls UNDI->StationAddress(). Is there a guaran= tee that the UNDI driver you are using will persist the configuration acros= s driver reloads / platform reboots? If there is no such guarantee, you sho= uld not reconnect UNDI driver - else the setting is lost. 2. Ipconfig interfaces with Ip4Config2 protocol to obtain MAC address to= display. Check "HwAddress" field in "EFI_IP4_CONFIG2_INTERFACE_INFO" structure. It is initialized in the Ip4Dxe driver, in Ip4Config2InitIfInfo(). If you f= ollow Ip4Config2InitIfInfo() upwards the stack, you will see that it gets c= alled in Ip4Dxe DriverBinding->Start() function. What I would suggest is to only reconnect SNP driver. Thanks, Maciej From: Sivaraman Nainar Sent: Friday, March 24, 2023 5:22 AM To: devel@edk2.groups.io; Maciej Rabeda ; Ra= beda, Maciej ; Santhosh Kumar V ; Raj V Akilan Subject: reg: MAC address could not change on pre-boot environment and fail= ed to PXE boot. Hello : We are writing a application to program the MAC from UEFI shell and with th= e updated MAC address trying to do the PXE Boot which failed. The application uses the Simple Network Protocols StationAddress() to updat= e the MAC. After update the Current Address in the Mode of SimpleNetwork In= terface updated to new MAC address. If we performed IfConfigl -l command th= e updated MAC not showing. Also in this environment PXE boot also got faile= d. To bind the updated MAC, tried giving "reconnect -r" from UEFI shell after = running test application and performed PXE boot. With On board Network cont= roller (Intel I219), the MAC address updated in Snp->Mode->CurrentAddress i= s reverted back to older MAC address. If reconnect not performed, the MAC = Address changing but PXE Failed to boot. Can someone comment if the method to update the MAC is correct or we missin= g something. Thanks Siva -The information contained in this message may be confidential and propriet= ary to American Megatrends (AMI). This communication is intended to be read= only by the individual or entity to whom it is addressed or by their desig= nee. If the reader of this message is not the intended recipient, you are o= n notice that any distribution of this message, in any form, is strictly pr= ohibited. Please promptly notify the sender by reply e-mail or by telephone= at 770-246-8600, and then delete or destroy all copies of the transmission. --------------------------------------------------------------------- Intel Technology Poland sp. z o.o. ul. Slowackiego 173 | 80-298 Gdansk | Sad Rejonowy Gdansk Polnoc | VII Wydz= ial Gospodarczy Krajowego Rejestru Sadowego - KRS 101882 | NIP 957-07-52-31= 6 | Kapital zakladowy 200.000 PLN. Spolka oswiadcza, ze posiada status duzego przedsiebiorcy w rozumieniu usta= wy z dnia 8 marca 2013 r. o przeciwdzialaniu nadmiernym opoznieniom w trans= akcjach handlowych. Ta wiadomosc wraz z zalacznikami jest przeznaczona dla okreslonego adresata= i moze zawierac informacje poufne. W razie przypadkowego otrzymania tej wi= adomosci, prosimy o powiadomienie nadawcy oraz trwale jej usuniecie; jakiek= olwiek przegladanie lub rozpowszechnianie jest zabronione. This e-mail and any attachments may contain confidential material for the s= ole use of the intended recipient(s). If you are not the intended recipient= , please contact the sender and delete all copies; any review or distributi= on by others is strictly prohibited. --_000_PH0PR11MB4773C3FEC4DED8FECDDA3DE9F9849PH0PR11MB4773namp_ Content-Type: text/html; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable

Hi Nainar,

 

  1. Snp->StationAddress() calls UNDI->StationAddress(). Is there a = guarantee that the UNDI driver you are using will persist the configuration= across driver reloads / platform reboots? If there is no such guarantee, you should not reconnect UNDI driver –= ; else the setting is lost.
  2. Ipconfig interfaces with I= p4Config2 protocol to obtain MAC address to display.

Check “HwAddress” field in “= ;EFI_IP4_CONFIG2_INTERFACE_INFO” structure.

It is initialized in the Ip4Dxe driver, in Ip= 4Config2InitIfInfo(). If you follow Ip4Config2InitIfInfo() upwards the stac= k, you will see that it gets called in Ip4Dxe DriverBinding->Start() fun= ction.

 

What I would suggest is to only reconnect SNP driver= .

 

Thanks,

Maciej

 

From: Sivaraman Nainar <sivaramann@ami.com= >
Sent: Friday, March 24, 2023 5:22 AM
To: devel@edk2.groups.io; Maciej Rabeda <maciej.rabeda@linux.inte= l.com>; Rabeda, Maciej <maciej.rabeda@intel.com>; Santhosh Kumar V= <santhoshkumarv@ami.com>; Raj V Akilan <rajva@ami.com>
Subject: reg: MAC address could not change on pre-boot environment a= nd failed to PXE boot.

 

Hello :

 

We are writing a application to program the MAC from= UEFI shell and with the updated MAC address trying to do the PXE Boot whic= h failed.

 

The application uses the Simple Network Protocols St= ationAddress() to update the MAC. After update the Current Address in the M= ode of SimpleNetwork Interface updated to new MAC address. If we performed = IfConfigl -l command the updated MAC not showing. Also in this environment PXE boot also got failed.=

 

To bind the updated M= AC, tried giving "reconnect -r" from UEFI shell after running tes= t application and performed PXE boot. With On board Network controller (Intel I219), the MAC address updated in Snp->Mode->Curre= ntAddress is reverted back to older MAC address.  If reconnect not per= formed, the MAC Address changing but PXE Failed to boot.<= /p>

 

Can someone comment i= f the method to update the MAC is correct or we missing something.

 

Thanks

Siva

-The information contained in this message may be co= nfidential and proprietary to American Megatrends (AMI). This communication= is intended to be read only by the individual or entity to whom it is addr= essed or by their designee. If the reader of this message is not the intended recipient, you are on notice th= at any distribution of this message, in any form, is strictly prohibited. P= lease promptly notify the sender by reply e-mail or by telephone at 770-246= -8600, and then delete or destroy all copies of the transmission.

Intel = Technology Poland sp. z o.o.
 ul. Słowackiego 173 | 80-298 Gdańsk | Sąd Rejonowy G= dańsk Północ | VII Wydział Gospodarczy Krajowego Rejest= ru Sądowego - KRS 101882 | NIP 957-07-52-316 | Kapitał zakła= dowy 200.000 PLN.
Spółka oświadcza, że posiada status du= 80;ego przedsiębiorcy w rozumieniu ustawy z dnia 8 marca 2013 r. o prz= eciwdziałaniu nadmiernym opóźnieniom w transakcjach handlowy= ch.

Ta wiadomość wraz z załącznikami jest przeznacz= ona dla określonego adresata i może zawierać informacje pouf= ne. W razie przypadkowego otrzymania tej wiadomości, prosimy o powiado= mienie nadawcy oraz trwałe jej usunięcie; jakiekolwiek przegl= 1;danie lub rozpowszechnianie jest zabronione.
This e-mail and any attachments may contain confidential material f= or the sole use of the intended recipient(s). If you are not the intended r= ecipient, please contact the sender and delete all copies; any review or di= stribution by others is strictly prohibited.

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