not affected by the deployment of this plan.
9. Conclusions
We are all aware of the growth in routing complexity, and the rapid
increase in allocation of network numbers. Given the rate at which
this growth is being observed, we expect to run out in a few short
years.
If the inter-domain routing protocol supports carrying network routes
with associated masks, all of the major concerns demonstrated in this
paper would be eliminated.
One of the influential factors which permits maximal exploitation of
the advantages of this plan is the number of people who agree to use
it.
If service providers start charging networks for advertising network
numbers, this would be a very great incentive to share the address
space, and hence the associated costs of advertising routes to
service providers.
10. Recommendations
The NIC should begin to hand out large blocks of class C addresses to
network service providers. Each block must fall on bit boundaries
and should be large enough to serve the provider for two years.
Further, the NIC should distribute very large blocks to continental
and national network service organizations to allow additional levels
of aggregation to take place at the major backbone networks. In
addition, the NIC should modify its procedures for the IN-ADDR.ARPA
domain to permit delegation along arbitrary octet boundaries.
Service providers will further allocate power-of-two blocks of class
C addresses from their address space to their subscribers.
All organizations, including those which are multi-homed, should
obtain address space from their provider (or one of their providers,
in the case of the multi-homed). These blocks should also fall on
bit boundaries to permit easy route aggregation.
To allow effective use of this new addressing plan to reduce
propagated routing information, appropriate IETF WGs will specify the
modifications needed to Inter-Domain routing protocols.
Implementation and deployment of these modifications should occur as
quickly as possible.
11 References
[1] Moy, J, "The OSPF Specification Version 2", RFC1247, Proteon,
Inc., January 1991.
[2] Rekhter, Y., and T. Li, "An Architecture for IP Address
Allocation with CIDR", RFC1518, T.J. Watson Research Center, IBM
Corp., cisco Systems, September 1993.
12. Security Considerations
Security issues are not discussed in this memo.
13. Authors' Addresses
Vince Fuller
BARRNet
Pine Hall 115
Stanford, CA, 94305-4122
EMail: vaf@Stanford.EDU
Tony Li
cisco Systems, Inc.
1525 O'Brien Drive
Menlo Park, CA 94025
EMail: tli@cisco.com
Jessica (Jie Yun) Yu
Merit Network, Inc.
1071 Beal Ave.
Ann Arbor, MI 48109
EMail: jyy@merit.edu
Kannan Varadhan
Internet Engineer, OARnet
1224, Kinnear Road,
Columbus, OH 43212
EMail: kannan@oar.net