Using IPv6 with prefixes shorter than a /64 on a LAN

Fernando Gont fernando at
Tue Jan 25 20:00:52 CST 2011

On 24/01/2011 08:42 p.m., Douglas Otis wrote:

> It seems efforts related to IP address specific policies are likely
> doomed by the sheer size of the address space, and to be pedantic, ARP
> has been replaced with multicast neighbor discovery which dramatically
> reduces the overall traffic involved.  

This has nothing to do with the number of entries required in the
Neighbor Cache.

> Secondly, doesn't Secure Neighbor
> Discovery implemented at layer 2 fully mitigate these issues?  I too
> would be interested in hearing from Radia and Fred.

It need not. Also, think about actual deployment of SEND: for instance,
last time I checked Windows Vista didn't support it.

Fernando Gont
e-mail: fernando at || fgont at
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1

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