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O2 eaddr changed

From Higher Intellect Vintage Wiki

Problem[edit]

The MAC address of my SGI O2 changed to ff:ff:ff:ff:ff:ff and so I can't use the Ethernetcard of my O2.

I tried to change the address with (at the command mode) setenv -f eaddr and then the address. But it didn't work.

So can someone help me. Do I have to change the Dallas chip of the systemboard?

Response[edit]

Put the PCI cardcage back in. If it is already in, and it still reads all FFs, you're hozed. The ethernet MAC level address is stored in a 3 pin Dallas IC (looks like a transistor) on the PCI card tray riser board. They're laser written, and you can't change them or write your own.

Time for a new PCI card tray from SGI.