Browse Prior Art Database

Router Renumbering Guide (RFC2072)

IP.com Disclosure Number: IPCOM000002624D
Original Publication Date: 1997-Jan-01
Included in the Prior Art Database: 2000-Sep-13

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

H. Berkowitz: AUTHOR

Abstract

IP addresses currently used by organizations are likely to undergo changes in the near to moderate term. Change can become necessary for a variety of reasons, including enterprise reorganization, physical moves of equipment, new strategic relationships, changes in Internet Service Providers (ISP), new applications, and the needs of global Internet connectivity. Good IP address management may in general simplify continuing system administration; a good renumbering plan is also a good numbering plan. Most actions taken to ease future renumbering will ease routine network administration.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 3% of the total text.

Network Working Group H. Berkowitz

Request for Comments: 2072 PSC International

Category: Informational January 1997

Router Renumbering Guide

Status of this Memo

This memo provides information for the Internet community. This memo

does not specify an Internet standard of any kind. Distribution of

this memo is unlimited.

Abstract

IP addresses currently used by organizations are likely to undergo

changes in the near to moderate term. Change can become necessary

for a variety of reasons, including enterprise reorganization,

physical moves of equipment, new strategic relationships, changes in

Internet Service Providers (ISP), new applications, and the needs of

global Internet connectivity. Good IP address management may in

general simplify continuing system administration; a good renumbering

plan is also a good numbering plan. Most actions taken to ease

future renumbering will ease routine network administration.

Routers are the components that interconnect parts of the IP address

space identified by unique prefixes. Obviously, they will be

impacted by renumbering. Other interconnection devices, such as

bridges, layer 2 switches (i.e., specialized bridges), and ATM

switches may be affected by renumbering. The interactions of these

lower-layer interconnection devices with routers must be considered

as part of a renumbering effort.

Routers interact with numerous network infrastructure servers,

including DNS and SNMP. These interactions, not just the pure

addressing and routing structure, must be considered as part of

router renumbering.

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2

2. Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . 3

3. Motivations for Renumbering . . . . . . . . . . . . . . . . 3

4. Numbering and Renumbering. . . . . . . . . . . . . . . . . . 9

5. Moving toward a Renumbering-Friendly Enterprise. . . . . . . 13

6. Potential Pitfalls in Router Renumbering. . . . . . . . . 20

7. Tools and Methods for Renumbering . . . . . . . . . . . . 25

8. Router Identifiers . . . . . . . . . . . . . . . . . . . . . 29

9. Filtering and Access Control . . . . . . . . . . . . . . . . 35

10. Interior Routing . . . . . . . . . . . . . . . . . . . . . . 37

11. Exterior Routing . . . . . . . . . . . . . . . . . . . . . . 39

12. Network Management . . . . . . . . . . . . . . . . . . . . . 41

13. IP and Protocol Encapsulation . . . . . . . . . . . . . . . 43

14. Security Considerations. . . . . . . . . . . . . . . . . . . 44

15. Planning and Implementing the Renumbering . . . . . . . . . 44

16. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 46

17. References . . . . . . . . . . . . . . . . . . . . . . . . . 47

18. Author's Address . . . . . . . . ....