Question: How do you change it?
Answer: Use the "ifconfig <interface> ether <value>" command to change it
to whatever you want. This doesn't seem to be documented in the "man
ifconfig" pages, though. This command works on SunOS 4.1.3 & 4.1.4. I was
told it works in Sol 2.X, but I have no multi-interface Sol 2.X machines to
try it on.
CAUTION: Be careful about what you change it to. If, by chance, you hit
another devices MAC address, it could get very interesting.
In my case, I have two machines, each with three ethernet interfaces.
Each inteface has a different IP address, and is on a different subnet.
One machine has three 10BaseT.
The other has one 10BaseT (le0) and two 100BaseT (hme0 & hme1).
I changed the MAC addresses to the le0 MAC address+1
(le0=8:0:20:12:73:d2, le1=8:0:20:12:73:d3, le2=8:0:20:12:73:d4) after I
verifyed there were no devices at the MAC addresses.
I added some lines in the /etc/rc.local file to set the MAC address at
boot and before the in.routd started.
# Change MAC addresses on le1 & le2
if [ -f /etc/hostname.le1 ]; then
echo 'Changing MAC on le1'
ifconfig le1 ether 8:0:20:XX:YY:ZZ
fi
if [ -f /etc/hostname.le2 ]; then
echo 'Changing MAC for le2'
ifconfig le2 ether 8:0:20:XX:YY:ZZ+1
fi
On the machine with the 100BaseT cards:
# Change MAC addresses on hme0 & hme1
if [ -f /etc/hostname.hme0 ]; then
echo 'Changing MAC on hme0
ifconfig le1 ether 8:0:20:XX:YY:ZZ
fi
if [ -f /etc/hotname.hme1 ]; then
echo 'Changing MAC for hme1'
ifconfig le2 ether 8:0:20:XX:YY:ZZ+1
fi
I am sure there is a way to automate it, so that you don't have to "hard
code" the MAC address, but this was a quick way around the problem.
After the reboot, you can see the new MAC addresses have taken effect,
and a look at the router ARP table verifies it.
Dave.