[homenet] homenet-prefix-assignment update

[Pierre Pfister <[e-mail]>]

Hello group,

I’d like to inform you about the changes made in the two last homenet-prefix-assignment updates.

http://tools.ietf.org/html/draft-pfister-homenet-prefix-assignment-02

The changes are mostly about fixing typos, but a few technical changes have been made as well (based on the experience gained from the implementation of the Prefix Assignment Algorithm over HNCP).


 — Changes between 00 and 01

- If a Delegated Prefix is included in another Delegated Prefix, it is ignored. This is intended to improve support for non-homenet routers that provide prefix sub-delegation. That way, sub-delegated prefixes are ignored.

- Adding network leader definition (The router with the highest identifier).

- Add a section about DHCPv6 downstream prefix delegation. For downstream RFC7084 routers support.

- Adding Delegated Prefix deprecation procedure in order to differentiate prefix deprecation and node disconnection. When a node disconnect, the DPs advertised by this node may be kept some time (depending on the DP's lifetimes). But if a DP is actively deprecated, nodes must stop using it immediately. 


 — Changes between 01 and 02

- Designated router election can make use of the information provided by the flooding protocol (i.e. when no router is designated yet, only the highest router id present on the link can become designated).

- New implementation guideline in appendix concerning "prefix waste avoidance". It proposes an algorithm that provides a good trade-of between randomness, pseudo-randomness and prefix selection efficiency.



Comments are welcome,

Pierre Pfister