[ipxe-devel] SuperMicro SYS-1028U-TR+ with Intel X710-DR2 nic card

[Hummel Frank]

A MAC address of 00:00:00:00:00:00 or 88:88:88:88:88:88 on Intel indicates that the NICs config EEPROM might not be programmed at all.
This can lead to a wrong/not detected PCI ID and IRQ problems.
If the MAC remains @ 00:... you will get in trouble as soon as a second system using the same wrong MAC is running in your network.


mit freundlichen Grüßen
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i. A. Dipl.Ing. (FH) Frank Hummel
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-----Ursprüngliche Nachricht-----
Von: ipxe-devel-bounces at lists.ipxe.org [mailto:ipxe-devel-bounces at lists.ipxe.org] Im Auftrag von Michael Brown
Gesendet: Mittwoch, 30. März 2016 21:36
An: Todd Stansell
Cc: ipxe-devel at ipxe.org
Betreff: Re: [ipxe-devel] SuperMicro SYS-1028U-TR+ with Intel X710-DR2 nic card

On 30/03/16 20:23, Todd Stansell wrote:
> I did enable undinic debug messages and see the following:
>
>    UNDINIC 0x23c6c using UNDI 0x870aa988
>    UNDINIC 0x23c6c has MAC address 00:00:00:00:00:00 and IRQ 11

That MAC address looks problematic.

> Not sure if that helps at all, but figured it might be useful.  We're 
> going to try to move this NIC into a different system type altogether 
> to see if it behaves any better.  Maybe there's something in the 
> Supermicro BIOS that's causing the interrupts to not fire or get lost 
> or something.  I have a hard time believing Intel's X710 10G NIC have an interrupt bug.

It's quite plausible.  UNDI is architecturally limited to using legacy interrupts, which are emulated on PCIe and which almost nothing else uses nowadays.

I'm interested to see if anything changes in a different system.  The interrupt issue is probably timing-sensitive, so a change in PCIe topology could easily affect it.

Michael
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