Hello Tomasz,
the sentences that are taken from the RFC2373 should have the following meaning:
0 0 0 1 1 2
|0 7 8 5 6 3|
+----+----+----+----+----+----+
|cccc|ccug|cccc|cccc|cccc|cccc|
+----+----+----+----+----+----+
(notice the position of u bit inside first byte of eui-64 if u bit is set first byte is 0x02)
if this spec were changed so that the u bit was used without inversion then to build a local scope 64 bits identifier for a serial interface (for an interface that hasn't its own MAC address) would require to set the u bit so:
0200:0:0:1 should be used instead of
::1
for the host portion of a serial line
the final 1 comes from the fact that the address cannot be made of all zeros.
instead by using an inverted u u=1 means global u=0 means local.
Now, that the specification is made we need to use it.
The first remark is that we don't need to wast a /64 ipv6 prefix over a point-to-point serial link just to say something.
so when mapping a MAC address for a LAN interface they set the u bit and you need to think to your OUI bytes with a 2 in first byte.
I agree I would have been easier without setting it to recognize the MAC address.
Hope to help
Giuseppe
