IPv6 Address Notation

[yRuN82]

I'm working on strengthening my IPv6 skills, and I have a question I would like to pose to the group...

What is the significance of the "1" that precedes fe80 in the following link local address?

1:fe80::4239:9231:7765:9A20

Also, since the FFFE was excluded in my example, does my example IPv6 address represent a non-Ethernet card reference? Perhaps, a wireless?

Any help would be greatly appreciated.

- Namev

 

[Cooky]

I don't think the preceding "1" should be there.
It's not part of the addressing scheme.

You're correct that if FFFE is not seen, the address was not derived from EUI-64, but other means such as DHCPv6 or SLAAC...it has nothing to do w/ wireless.

 

[ScottMac]

Compare your NIC's MAC address to your v6 address.
That is a method for automatically generating an address.

 

[yRuN82]

Thanks for the feedback!

 

[ScottMac]

and I think the "1:" was the interface number, FWIW

 

[alkemyst]

and I think the "1:" was the interface number, FWIW

me too...FE80 should be the start of any link local address really. I am not an expert by any means, but seeing FE80 = link local to me. I have never seen anything prefixed to that.