Anil Gulecha writes: > 1) CPU serial number - x86 cpus do not have unique ids.. sparc does! > 2) i considered using the 48bit mac id of the Ethernet card.. however > ifconfig doesn't o/p the details that early in the boot process. If > there another method to get the card detials, I could use it.
Don't forget that machines may have zero, one, or many Ethernet interfaces, and that Ethernet interfaces can be removed and replaced and inserted into other machines. Getting a fixed ID for the system often means plumbing the depths of what the "system" is. What about CPU cards plugged into mini-PCI cages? What about swap-outs of CPUs? What happens on backup and restore and upgrade or on migration between machines or hardware upgrades? I don't think there's any clear answer other than to fudge it. Use something like libuuid to create a unique identifier, write it some place you won't forget (such as /etc), and make sure you have a plan in place for when it _does_ end up changing or (worse!) getting duplicated by some administrative blunder. -- James Carlson, Solaris Networking <[EMAIL PROTECTED]> Sun Microsystems / 1 Network Drive 71.232W Vox +1 781 442 2084 MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677 _______________________________________________ opensolaris-code mailing list opensolaris-code@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/opensolaris-code
