RFC 1992 (rfc1992) - Page 2 of 27
The Nimrod Routing Architecture
Alternative Format: Original Text Document
RFC 1992 Nimrod Routing Architecture August 1996
3.5.4 Inbound Connectivity . . . . . . . . . . . . . . . . . . 12
3.5.5 Outbound Connectivity . . . . . . . . . . . . . . . . . 12
4. Physical Realization . . . . . . . . . . . . . . . . . . . . . 13
4.1 Contiguity . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 An Example . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Multiple Locator Assignment . . . . . . . . . . . . . . . . 15
5. Forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1 Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2 Trust . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3 Connectivity Specification (CSC) Mode . . . . . . . . . . . 24
5.4 Flow Mode . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.5 Datagram Mode . . . . . . . . . . . . . . . . . . . . . . . 25
5.6 Connectivity Specification Sequence Mode . . . . . . . . . . 26
6. Security Considerations . . . . . . . . . . . . . . . . . . . . 26
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 27
1. Introduction
Nimrod is a scalable routing architecture designed to accommodate a
continually expanding and diversifying internetwork. First suggested
by Noel Chiappa, the Nimrod architecture has undergone revision and
refinement through the efforts of the Nimrod working group of the
IETF. In this document, we present a detailed description of this
architecture.
The goals of Nimrod are as follows:
1. To support a dynamic internetwork of arbitrary size by
providing mechanisms to control the amount of routing information
that must be known throughout an internetwork.
2. To provide service-specific routing in the presence of multiple
constraints imposed by service providers and users.
3. To admit incremental deployment throughout an internetwork.
We have designed the Nimrod architecture to meet these goals. The
key features of this architecture include:
1. Representation of internetwork connectivity and services in the
form of maps at multiple levels of abstraction.
2. User-controlled route generation and selection based on maps and
traffic service requirements.
3. User-directed packet forwarding along established paths.
Castineyra, et. al. Informational