On Sat, Feb 09, 2002 at 05:25:50AM -0800, Terry Lambert wrote: > Wilko Bulte wrote: > > > Some NICs allow you to change the default MAC address by > > > reflashing the BIOS in them. There are tools to do this > > > in software. > > > > Or just reprogram it for runtime use only. DECnet comes to mind. > > No flashing needed there. > > Yes. The LANCE based DEQNA's from the MicroVAX II were > really strange in supporting that. It wasn't until I > realized that the MAC address was the DEC assigned > address block prefix plus an internal prefix, plus the > DECNet node number, that I realized why I could not > talk to DECNet with my raw EtherLink I drivers, even > though the packets were formatted correctly. 8-).
Cool huh? We once had that when we wanted to isolate a part of the network using a programmable bridge. The network folks programmed it for us, then a colleague put DECnet on it. And nuked another DECnet node on the network because the bridge happily forwarded the new MAC-address' packets. The fact that we picked an arbitrary DECnet address which proved a main node on the DEC internal Easynet left us pretty impopulair for a considerable time ;-) -- | / o / /_ _ [EMAIL PROTECTED] |/|/ / / /( (_) Bulte Arnhem, the Netherlands To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
