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What is the PXE Client System Architecture Type “BC EFI (7)” from RFC 4578?



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)
Come Celebrate our 10 Year Anniversary!How do I pass arguments from the PXE command line to a kickstart %pre, %post script?Unable to mount the file system from server to client while booting through networkSCCM 2012, Lenovo X240, won't PXE?BTRFS-RAID and booting from EFI system partitionXenServer 7.1.0 PXE installationHow does one get the system UUID from a server's BMC?



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8















RFC 4578 defines various machine architectures for PXE as follows:



Type Architecture Name
---- -----------------
0 Intel x86PC
1 NEC/PC98
2 EFI Itanium
3 DEC Alpha
4 Arc x86
5 Intel Lean Client
6 EFI IA32
7 EFI BC
8 EFI Xscale
9 EFI x86-64


I've tested out two IBM machines (HS22 blade, x3550M3) and they both do EFI PXE boot using the 'EFI BC' architecture.



What does it stand for? When is it used? Why is IBM using it instead of 'EFI x86-64'?










share|improve this question






























    8















    RFC 4578 defines various machine architectures for PXE as follows:



    Type Architecture Name
    ---- -----------------
    0 Intel x86PC
    1 NEC/PC98
    2 EFI Itanium
    3 DEC Alpha
    4 Arc x86
    5 Intel Lean Client
    6 EFI IA32
    7 EFI BC
    8 EFI Xscale
    9 EFI x86-64


    I've tested out two IBM machines (HS22 blade, x3550M3) and they both do EFI PXE boot using the 'EFI BC' architecture.



    What does it stand for? When is it used? Why is IBM using it instead of 'EFI x86-64'?










    share|improve this question


























      8












      8








      8


      1






      RFC 4578 defines various machine architectures for PXE as follows:



      Type Architecture Name
      ---- -----------------
      0 Intel x86PC
      1 NEC/PC98
      2 EFI Itanium
      3 DEC Alpha
      4 Arc x86
      5 Intel Lean Client
      6 EFI IA32
      7 EFI BC
      8 EFI Xscale
      9 EFI x86-64


      I've tested out two IBM machines (HS22 blade, x3550M3) and they both do EFI PXE boot using the 'EFI BC' architecture.



      What does it stand for? When is it used? Why is IBM using it instead of 'EFI x86-64'?










      share|improve this question
















      RFC 4578 defines various machine architectures for PXE as follows:



      Type Architecture Name
      ---- -----------------
      0 Intel x86PC
      1 NEC/PC98
      2 EFI Itanium
      3 DEC Alpha
      4 Arc x86
      5 Intel Lean Client
      6 EFI IA32
      7 EFI BC
      8 EFI Xscale
      9 EFI x86-64


      I've tested out two IBM machines (HS22 blade, x3550M3) and they both do EFI PXE boot using the 'EFI BC' architecture.



      What does it stand for? When is it used? Why is IBM using it instead of 'EFI x86-64'?







      pxe-boot uefi






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited May 17 '18 at 18:41









      Flow

      799815




      799815










      asked Jan 13 '12 at 16:18









      MikeyBMikeyB

      33.2k784174




      33.2k784174




















          2 Answers
          2






          active

          oldest

          votes


















          7














          EFI BC = EFI Byte Code. EFI Byte Code is a processor agnostic language for device drivers, PXE, and other EFI extensions so that the code can be written once and run on any supporting platform.






          share|improve this answer
































            2














            There’s a conflict between the architecture types defined in RFC4578 DHCP PXE Options and the IANA registered Processor Architecture Types: the latter notes that x64 UEFI is type 00:07 which seems to be the value used in practice (ref. https://www.syslinux.org/archives/2014-October/022684.html).






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              2 Answers
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              active

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              active

              oldest

              votes









              7














              EFI BC = EFI Byte Code. EFI Byte Code is a processor agnostic language for device drivers, PXE, and other EFI extensions so that the code can be written once and run on any supporting platform.






              share|improve this answer





























                7














                EFI BC = EFI Byte Code. EFI Byte Code is a processor agnostic language for device drivers, PXE, and other EFI extensions so that the code can be written once and run on any supporting platform.






                share|improve this answer



























                  7












                  7








                  7







                  EFI BC = EFI Byte Code. EFI Byte Code is a processor agnostic language for device drivers, PXE, and other EFI extensions so that the code can be written once and run on any supporting platform.






                  share|improve this answer















                  EFI BC = EFI Byte Code. EFI Byte Code is a processor agnostic language for device drivers, PXE, and other EFI extensions so that the code can be written once and run on any supporting platform.







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Jan 13 '12 at 16:30









                  MikeyB

                  33.2k784174




                  33.2k784174










                  answered Jan 13 '12 at 16:29









                  Chris SChris S

                  73.8k10107202




                  73.8k10107202























                      2














                      There’s a conflict between the architecture types defined in RFC4578 DHCP PXE Options and the IANA registered Processor Architecture Types: the latter notes that x64 UEFI is type 00:07 which seems to be the value used in practice (ref. https://www.syslinux.org/archives/2014-October/022684.html).






                      share|improve this answer








                      New contributor




                      user310346 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                      Check out our Code of Conduct.
























                        2














                        There’s a conflict between the architecture types defined in RFC4578 DHCP PXE Options and the IANA registered Processor Architecture Types: the latter notes that x64 UEFI is type 00:07 which seems to be the value used in practice (ref. https://www.syslinux.org/archives/2014-October/022684.html).






                        share|improve this answer








                        New contributor




                        user310346 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                        Check out our Code of Conduct.






















                          2












                          2








                          2







                          There’s a conflict between the architecture types defined in RFC4578 DHCP PXE Options and the IANA registered Processor Architecture Types: the latter notes that x64 UEFI is type 00:07 which seems to be the value used in practice (ref. https://www.syslinux.org/archives/2014-October/022684.html).






                          share|improve this answer








                          New contributor




                          user310346 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.










                          There’s a conflict between the architecture types defined in RFC4578 DHCP PXE Options and the IANA registered Processor Architecture Types: the latter notes that x64 UEFI is type 00:07 which seems to be the value used in practice (ref. https://www.syslinux.org/archives/2014-October/022684.html).







                          share|improve this answer








                          New contributor




                          user310346 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.









                          share|improve this answer



                          share|improve this answer






                          New contributor




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                          answered Apr 16 at 13:26









                          user310346user310346

                          211




                          211




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                          user310346 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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