Using /126 for IPv6 router links
David Barak
thegameiam at yahoo.com
Tue Jan 26 14:38:43 UTC 2010
From: Mark Smith nanog at 85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org
>Why can't IPv6 node addressing be as easy to understand and work with
>as Ethernet addresses? They were designed in the early 1980s*. 28 years
>or so years later, it's time for layer 3 addressing to catch up.
Becase Ethernet addresses are only locally significant, are not manually assigned in the vast majority of cases, and changing a MAC by replacing a NIC has no bearing on the configuration of a { server | router ACL | etc }.
Layer 3 addressing is globally significant, and the case we're discussing is addresses which are human-assigned rather than automatically configured. Link-local autoconfiguration in IPv6 works like a champ, and behaves pretty much the way I would want it to. Global addressing approaches, on the other hand, are highly optimized in directions which make them less flexible or have surprising consequences (hence this thread).
David Barak
Need Geek Rock? Try The Franchise:
http://www.listentothefranchise.com
More information about the NANOG
mailing list