Comments and additions are invited. If there is no enthusiasm for the
project I'll drop the subject.
Scope
-----
This would cover the various Softwires 4 across 6 approaches: DS-Lite
(with GI DS-Lite a special case), MAP-E, LW4o6, MAP-T, 4rd.
Method
------
In summary, the analysis would proceed using two or three basic
scenarios. The operation of each approach within each scenario would be
analyzed by walking through how it would work for various aspects. All
approaches would be evaluated against the same set of aspects (more
details below). This preliminary analysis would be completed for all
approaches before any conclusions are drawn.
Going forward, differences between the different approaches would be
identified. These would form the core of the I-D in its finished form.
The text reflecting the initial analysis would be discarded if it wasn't
interesting or moved to appendices if it was.
Scenarios
---------
At a minimum, we should use two scenarios: an established fixed
broadband network, and an established LTE network. Suggestions welcome
here if this list should be expanded or the scenarios described more
elaborately.
Aspects of the Walk-Through
---------------------------
I see the following aspects as a preliminary list. Again, comments are
invited.
Numbering Plans
- IPv4
- IPv6
Routing
Operations
- bringing a border router into service
- adding a subscriber
- moving a subscriber
- logging
- lawful surveillance
Scalability
- growth in number of subscribers
- growth in traffic
Fault Management
- resilience to network failures
- traceability of subscriber issues
Network Attachment
Data Plane Issues
- fragmentation
- multicast
- check sums
QoS
- delay
- jitter
Tom Taylor
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