[RRG] mapping "issues" list from this morning

[Scott Brim <swb@employees.org>]

Attached is the list of criteria from this morning, modulo a little 
editing.  This is not complete.  Please add *and* delete and clarify.

My own comments will follow.

Scott

Support for other network needs
-------------------------------

- Mobility.
  - Impact on preferences for mobility approaches
  - Does it meet mobility requirements
- Emergency services.


Delay and/or Drop of initial packets
------------------------------------

- Whether there will be any delay at all (might even get there
  faster).
- Number of packets that might be delayed, dropped.
- Between sites and/or hosts.
- Trade off determinism of delay/drop versus agility & light weight.
  Analyze based on how bad it would be.
- Effect on transport layer, session.
- Ultimately only end user experience is visible.
- Possibility of difference classes of service?


Push, Poll, Hybrids
-------------------

- Possibly proactive, dynamic adjustment of behavior.
  - By src/dst (site)
  - Responsiveness
  - Other parameters?


Security considerations
-----------------------

- Interactions with drop/delay.  (Eliot Lear -- needs clarification
  please).
- Authorization: Don't take requestors down garden path.  Don't give
  them information they aren't authorized to actually use.
- Security of mapping system itself: updates authenticated .
- Authentication of map replies.
- Interactions between security of mapping system and security of core
  routing.


Granularity
-----------

- What level of specificity?
- Ability to operate at multiple levels of granularity simultaneously.




Churn
-----

- How system responds with rate of intentional changes.


Mapping points
--------------

- Flexibility in mapping points: end system, domain border, in
  between.  
- Placement of mapping points: those that own the mappings, those that
  use them, or in a third party
- Who is authoritative for the mapping.  Owner, holder, user.


Interaction between rate, state, and delay
--------------------------------------

- Interaction between rate, state, and delay.


Deployability (Incremental)
---------------------------

- Interworking with existing deployments.
- How soon are benefits seen?
- Who gains.  Is it the one doing the deployment?
- Does a deployment require more than one party, coordinated?
- Easing v4=>v6 is not an issue.


Flexibility
-----------

- Possibility for hierarchy
- Ability to express preferences (policy)


Failure modes
-------------

- How does mapping system adapt to unintentional changes in reachability (if at
  all).
- Dependence on something not on the data path (-> uncontrolled  weaknesses).
- Resilience of mapping system.