On Mon, Jan 8, 2018 at 12:03 PM, Nicholas Warren <nwar...@barryelectric.com> wrote:
> Layman here, I was reviewing RFCs for a local address for IPv6. I came > across two RFCs that seem interesting. > > 3879 Which deprecates Site Local Addresses. > 4193 Which seems to add Unique Local Addresses. > > What is the main difference here? Why was this standard removed then added > back? > Hi Nich, ULA is the IPv6 equivalent to RFC1918. If assigned as instructed (randomly), it can be used to build multi-organziation private networks with a relatively low risk of collision, a property lacking in RFC1918. Other than that, it's exactly the same as RFC 1918. Site local is deprecated. As explained in the RFC, the concept of a "site" could not be usefully defined for the purpose of private addressing. You can safely ignore it. Regards, Bill Herrin -- William Herrin ................ her...@dirtside.com b...@herrin.us Dirtside Systems ......... Web: <http://www.dirtside.com/>