"Dominic J. Eidson" wrote:
On Thu, 18 Sep 2003, John Kristoff wrote:
Fortunately, this practice rarely occurs these days (token ring / SNA shops often did this) although I'd be curious if anyone still does it.
box:~ # /sbin/lspci | grep 'Happy' 01:03.1 Ethernet controller: Sun Microsystems Computer Corp. Happy Meal (rev 01) box:~ # /sbin/ifconfig | grep 'eth' eth0 Link encap:Ethernet HWaddr DE:AD:BE:EF:00:B0 eth1 Link encap:Ethernet HWaddr DE:AD:BE:EF:00:B1 eth2 Link encap:Ethernet HWaddr DE:AD:BE:EF:00:B2 eth3 Link encap:Ethernet HWaddr DE:AD:BE:EF:00:B3
It didn't come with it's own MAC address pre-programmed...
Sun, by default, loads their manufacturer ID as the first three bytes and uses the system ID (burned into the *mumble-mumble* chip on the motherboard) in the last three. Since the sysID is unique this guarantees global uniqueness. This also means, by default, all NICs in a Sun have the same MAC. This is considered a feature. There is a knob in the EEPROM, 'local-mac-address?', that will use the MAC address(es) burned into the card rather than the sysID. However, for a NIC integrated into the motherboard, like an hme, there is no "local" MAC, just the sysID. -- Crist J. Clark crist.clark@globalstar.com Globalstar Communications (408) 933-4387