On 1/15/17 8:08 AM, Justin Wilson wrote:
-assign a /64 for point to point links (aka the equivalent of /30s). Again, don’t think in terms of host count. anything smaller than /64’s breaks things. Some providers out there assign smaller blocks, but it breaks things and isn’t RFC. Using a /128 is a hot debate at the moment. Some folks are willing to live with the stuff that is broken. The whole /127 or /128 debate came up due to security concerns mainly.
Use of /127 on router links is RFC 6164 https://tools.ietf.org/html/rfc6164
