Re: ARP interfering with Etherboot TFTP?

On Mar 8, 2006, at 8:34 AM, John Connett/ENG/UK/Plasmon wrote:
> 17234 15.238 skylon.devel.pcs 10.4.2.46        ARP  Who has  
> 10.4.2.46?  Tell 10.4.2.152
> 17235 15.238 nogbad.devel.pcs skylon.devel.pcs ARP  10.4.2.46 is at  
> 00:30:05:93:54:c5
> 17236 15.238 10.4.2.46        skylon.devel.pcs ARP  10.4.2.46 is at  
> 00:30:05:83:54:c5
> Indeed curious.
> Indeed weird, curious, but explicable!  The BCM5721 has onboard 'IPMI
> 1.5 Remote Manageability' which is accessible over the LAN interface.
> This had been configured at the same IP address (10.4.2.46) as the
> host system.  My guess is that this corresponds to the '93' MAC
> address.

Impressive tenacity.  You, Sir, are an impressive debugger.

> Once the BIOS was used to configure this to another address the
> problem went away ...

Wow.  Now there's an interesting piece of information.  That's quite  
amazing.

I can easily imagine the server might have gotten confused by getting  
a different MAC address for the client midstream, since it probably  
started replying to the new MAC address, and Etherboot had no idea  
who it was talking to (since it wasn't the MAC address Etherboot had  
for the card anymore).

It's nice to find out that it wasn't a tg3 bug (though I did take a  
look at the IRQ code it tg3).

> Thanks for all the help

No, thank you.  It was your tenacity and focus that found the  
problem.  It was a pleasure to assist.

> --
> John Connett

Marty

-- 
     Try: http://rom-o-matic.net/ to make Etherboot images instantly.

    Name: Marty Connor
US Mail: Entity Cyber, Inc.; P.O. Box 391827;
          Cambridge, MA 02139; USA
   Voice: (617) 491-6935; Fax: (617) 491-7046
   Email: [email protected]
     Web: http://www.etherboot.org/



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