Le 23/10/2012 14:05, Brian E Carpenter a écrit :
On 20/10/2012 19:10, Alexandru Petrescu wrote: ..
But with vehicles, one connects a vehicle here and gets a prefix,
then moves in that area and gets another prefix. At that point,
if the router obtaining a prefix wants to delegate further to
another vehicle needs to change the delegated prefix.
Why wouldn't RPL be used for such networks? It has built-in PD for
dynamic networks, if I understand it correctly, with RA used at the
subnet level.
RA used to exchange routes - if this is what you mean, and yes it may be
used by RPL (last time I read it).
If the question is about this, then I think it is pertinent. One may
imagine a way to use RPL on the MRs for that purpose.
However, I doubt RPL can Delegate Prefixes (in the pure sense of Prefix
Delegation).
What we need here is a means to Delegate Prefixes, not to exchange
routes. A Prefix is Delegated by one Router to Another by setting up a
route at self towards the other _and_ informing the other about this
Delegated Prefix. The route exchange operation is different: router
sets up a route entry about a route that the other router tells.
For the operation of exchanging routes we use a different protocol than
RPL, which is also based on RA, but not ND-PD (it is
http://tools.ietf.org/html/draft-petrescu-autoconf-ra-based-routing-02)
Alex
Brian
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