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- Network Working Group C. Huitema, Chair
- Request for Comments: 1481 Internet Architecture Board
- July 1993
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- IAB Recommendation for an Intermediate Strategy to
- Address the Issue of Scaling
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- Status of this Memo
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- This memo provides information for the Internet community. It does
- not specify an Internet standard. Distribution of this memo is
- unlimited.
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- Recommendation
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- Classless Inter-Domain Routing (CIDR) proposes strategies for address
- assignment of the existing IP address space with a view to conserve
- the address space and stem the explosive growth of routing tables in
- default-route-free routers run by transit routing domain providers
- [1]. CIDR is proposed as an immediate term strategy to extend the
- life of the current 32 bit IP address space. This strategy presumes
- that a suitable long term solution is being addressed within the
- Internet technical community.
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- The basic components of the CIDR plan are: management of the
- allocation of Internet address space and provision of a mechanism for
- aggregation of routing information. The IP community has published
- several RFCs and Internet-Drafts which describe the architecture for
- IP address assignment and routing protocols which will promote the
- deployment of CIDR. These documents have led to changes in the way
- network address are allocated and have prompted enhancements to the
- inter-domain and intra-domain routing protocols.
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- With the CIDR prompted changes in the management of the allocation of
- the Internet address space, allocation of blocks of Class C numbers
- leads to an explosion of the routing tables. So, it is important
- that the techniques for aggregating information in the routing
- protocols keep pace with the change in the allocation of IP numbers.
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- The IAB endorses the CIDR architecture and its implementation. In
- addition, the IAB supports the actions taken by the IANA and
- InterNIC, the router vendors, and the network operators to implement
- CIDR to address the scaling problem that we are facing with the
- growth of the Internet.
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- IAB [Page 1]
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- RFC 1481 IAB on CIDR July 1993
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- References
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- [1] Fuller, V., Li, T., Yu, J., and K. Varadhan, "Supernetting: an
- Address Assignment and Aggregation Strategy", RFC 1338, BARRNet,
- cisco, Merit, OARnet, June 1992.
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- [2] Gerich, E., "Guidelines for management of IP Address Space", RFC
- 1466, Merit, May 1993.
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- [3] Topolcic, C., "Schedule for IP Address Space Management
- Guidelines", RFC 1367, CNRI, October 1992.
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- [4] Rekhter, Y., and T. Li, "An Architecture for IP Address
- Allocation with CIDR", Work in Progress, January 1993.
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- [5] Rekhter, Y., and C. Topolcic, "Exchanging Routing Information
- across Provider/Subscriber Boundaries in CIDR environment", Work
- in Progress, February 1993.
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- Security Considerations
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- Security issues are not discussed in this memo.
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- Author's Address
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- Christian Huitema
- INRIA, Sophia-Antipolis
- 2004 Route des Lucioles
- BP 109
- F-06561 Valbonne Cedex
- France
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- Phone: +33 93 65 77 15
- EMail: Christian.Huitema@MIRSA.INRIA.FR
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- IAB [Page 2]
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