Robin,
NERD on its own won't work because every ITR in the world would need the full feed of mapping updates.
Table 1 in Section 5.1 of draft-lear-lisp-nerd-02.txt addresses this somewhat. At 10^8 EIDs, assuming IPv6 addresses, the database size is likely to be less than 6 GB. Let us be pessimistic and say that the update rate is 1.0% per day, leading to a change rate of 60MB per day, or an hourly rate of 2.5MB. My netnews server could do this in 1987. We're talking about 2050. What's the problem?
Eliot -- to unsubscribe send a message to rrg-request@psg.com with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg