[edk2-devel] Static IP for PXE/HTTP boot

[edk2-devel] Static IP for PXE/HTTP boot

[Mike Beaton via groups.io]

I spotted that OVMF completely ignores the configured IPv4 static IP
settings, for PXE and HTTP boot, and just uses DHCP anyway. (Confirmed
on various versions from edk2-stable201905 to current master.)

When looking at the user-readable paths for PXE and HTTP boot options,
it seems likely that this is indeed the intended behaviour:

PciRoot(0x0)/Pci(0x3,0x0)/MAC(525400123456,0x1)/IPv4(0.0.0.0,0x0,DHCP,0.0.0.0,0.0.0.0,0.0.0.0)

PciRoot(0x0)/Pci(0x3,0x0)/MAC(525400123456,0x1)/IPv4(0.0.0.0,0x0,DHCP,0.0.0.0,0.0.0.0,0.0.0.0)/Uri()

Furthermore, PXE 2.1 spec (e.g. §2.2.1) gives no indication PXE boot
is supposed to work with static IP, and while it is less clear it
seems somewhat similar for HTTP boot in UEFI specification (e.g. v2.10
§24.7.4).

Hence to my questions, if anyone has time to answer:

1. Is it correct that the static IP settings available in OVMF are
intended to be ignored for PXE and HTTP boot?

2. Is there any (documented?) way to set a static IP for PXE or HTTP
boot? (With HTTP boot, in particular, we can already set the boot URI
in the path, so if we could set the IPv4 addr/mask/gateway/dns then we
could boot without DHCP.)

3. If it's not too general to ask, what types of application are the
IP settings intended for, if not PXE/HTTP boot? Just other IP-based
applications, in general, I guess?

Thanks in advance for any help!


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