The Routing Over Large Clouds Mailing List Archive by date

[David Horton <horton@citr.com.au>]

Can I get some examples of SCSP in a concrete context of NHRP or one
of the other protocols? I found the draft a bit hard to read.

What cache entry types are we trying to synchronise? 
Is it just registers, or authoritative replys, or the whole cache?

If it is registers, then we have a nice authoritative single place
and event for tagging i.e. the place is the NHS receiving the register,
and it can tag the cache entry with a sequence number/time when it
receives the register packet from the client. (Is the CSA sequence 
number kept on a per cache entry basis, mastered at NHS receiving 
the register, or the designated server?)

If it is authoritative replys too, is the responder NHS the master,
or is it the client?

If transit entries are to be synchronised too, do we need NHRP to be 
enhanced to have some idea of time too, so that the existing caching
schemes can work too. The cache sharing of cached information looks
a bit susceptable to overwriting newer data received by normal protocol
operation by older data by SCSP, or storms of cache updates as a
reply is cached by multiple NHSs through protocol caching, then being
distributed by SCSP alignment.

Can cache-aligned entries be returned in authoritative requests
or are they considered the same as "forwarded"?

What cache data are we trying to cache?
A general NHRP cache entry maps :-
target Protocol address + prefix length --> Next hop protocol and NBMA address
					    + hold, MTU, entry type, ...

Which bit of this advertised in the summary record?
I would have assumed it to be the Protocol address + prefix length?
(My reading of SCSP seems to indicate the NBMA address?)

cheers,
David

 David Horton
 Centre for Information Technology Research
 Level 2 South Tower, 339 Coronation Drive, Milton, Australia 4064
 Email: d.horton@citr.uq.oz.au       Phone +61 7 32592222   Fax +61 7 32592259