RFC 1467 (rfc1467) - Page 3 of 9
Status of CIDR Deployment in the Internet
Alternative Format: Original Text Document
RFC 1467 Status of CIDR Deployment in the Internet August 1993
d) Class C network numbers were allocated according to the
addressing plan of [1], now obsoleted by [2]. Allocation
continued to be performed by the Internet Registry (IR)
for regions of the world where an appropriate regional
registry had not yet been designated by the IANA.
2) 14 February 93:
The schedule in [3] was re-evaluated, and there appeared to
be no reason to readjust it, so it was continued as
originally set out.
3) 15 April 93:
a) The IR began to allocate all networks according to the
addressing plan of [1], now obsoleted by [2], in
appropriately sized blocks of Class C numbers.
b) Class B network numbers became difficult to obtain,
following the recommendation of the addressing plan and
were only issued when justified.
Furthermore, throughout this time period, network service providers
have requested blocks of network numbers from the Class C address
space for the purpose of further allocating them to their clients.
The network service providers were allocated such space by the RIPE
NCC or the IR, acting for North America and the Pacific Rim. This
process has started to distribute the function of address
registration to a more regional level, closer to the end users. The
process has operated as hoped for, with no major problems.
3. Milestone that has not been met
The proposed schedule of [3] stated that 6 June 1993 was the date
when an address aggregation mechanism would be generally available in
the Internet. Although this target date was based on the plans as
stated by the router vendors and was reasonable at the time the
schedule in [3] was formulated, it has slipped. Nevertheless, the
continuation of that schedule has so far not added significantly to
the problems of the Internet. The rest of this document looks at the
current situation and what can be expected in the near future.
4. Current status of address aggregation mechanisms in commercial
routers
Although RFCs 1366, 1466, and 1367 do not depend on any specific
address aggregation technology, there is consensus in the Internet
community to use Classless Inter-Domain Routing (CIDR) [4]. CIDR is
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