Ethernet address of second board on Sun

[stpeters at dawn.crd.ge.com]

<cs.vu.nl!sater at rutgers.uucp> writes:
Contrary to every law in the Ethernet world Sun has decided to give
both boards the same Ethernet address.

<ehrlich at shire.cs.psu.edu> comments:
Here is were the trouble starts.  Assume I have a Sun with three ethernet
interfaces that I would like to use as a gateway between the two class B
nets ... [description of expected dire consequences]

Ethernet boards with hard-wired Enet addresses went out of fashion long
ago.  Modern Enet interfaces are software configurable.  The default
Ethernet address assigned to a Sun is stored in a PROM on the cpu board,
and the Enet interface is configured to that address at boot time.  (This
lets you change Enet interface boards without losing your Enet address.)

For when you have more than one board, ifconfig lets you configure
them to different Enet addresses:
	/etc/ifconfig ie0 8:0:20:1:9b:3a ...
	/etc/ifconfig ie1 8:0:20:1:9b:3b ...

Obviously, a gateway also has to have a different IP address on each IP
network.  Further, it has to have a different hostname (a hostname is just
a symbolic IP address).  Assign each interface its IP address with
ifconfig.

It helps to use related hostnames, so people can recognize that they refer
to the same machine.

--
Dick St.Peters
GE Corporate R&D, Schenectady, NY
stpeters at dawn.crd.ge.com
uunet!steinmetz!dawn!stpeters

GE would charge for opinions if it could find any.  These are mine.