On Wed, 8 Oct 2014, Alexandru Petrescu wrote:

I didnt know that? Can you elaborate? Is it that I can not set radvd with A=1 and plen=63? Or is it that the Host receiving this RA will not know what do with this RA?

https://datatracker.ietf.org/doc/draft-ietf-6man-why64/?include_text=1

"As a result, RFC 4291 describes a method of forming interface
   identifiers from IEEE EUI-64 hardware addresses [IEEE802] and this
   specifies that such interface identifiers are 64 bits long."

If you set anything different than /64, then A=1 is meaningless and the host won't form SLAAC based addresses based on A=1.

--
Mikael Abrahamsson    email: [email protected]

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