Network Working Group R. Ullmann
Request for Comments: 1476 Process Software Corporation
June 1993
RAP: Internet Route Access Protocol
Status of this Memo
This memo defines an Experimental Protocol for the Internet
community. It does not specify an Internet standard. Discussion and
suggestions for improvement are requested. Please refer to the
current edition of the "IAB Official Protocol Standards" for the
standardization state and status of this protocol. Distribution of
this memo is unlimited.
Abstract
This RFC describes an open distance vector routing protocol for use
at all levels of the internet, from isolated LANs to the major
routers of an international commercial network provider.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . 2
1.1 Link-State and Distance-Vector . . . . . . . . . . 3
1.2 Terminology . . . . . . . . . . . . . . . . . . . 3
1.3 Philosophy . . . . . . . . . . . . . . . . . . . . 3
2. RAP Protocol . . . . . . . . . . . . . . . . . . . 4
2.1 Command Header Format . . . . . . . . . . . . . . 4
2.1.1 Length field . . . . . . . . . . . . . . . . . . . 4
2.1.2 RAP version . . . . . . . . . . . . . . . . . . . 5
2.2 RAP Commands . . . . . . . . . . . . . . . . . . . 5
2.2.1 No operation . . . . . . . . . . . . . . . . . . . 5
2.2.2 Poll . . . . . . . . . . . . . . . . . . . . . . . 6
2.2.3 Error . . . . . . . . . . . . . . . . . . . . . . 7
2.2.4 Add Route . . . . . . . . . . . . . . . . . . . . 8
2.2.5 Purge Route . . . . . . . . . . . . . . . . . . . 9
3. Attributes of Routes . . . . . . . . . . . . . . . 9
3.1 Metric and Option Format . . . . . . . . . . . . .10
3.1.1 Option Class . . . . . . . . . . . . . . . . . . 10
3.1.2 Type . . . . . . . . . . . . . . . . . . . . . . 10
3.1.3 Format . . . . . . . . . . . . . . . . . . . . . 11
3.2 Metrics and Options . . . . . . . . . . . . . . 11
3.2.1 Distance . . . . . . . . . . . . . . . . . . . . 12
3.2.2 Delay . . . . . . . . . . . . . . . . . . . . . 12
3.2.3 MTU . . . . . . . . . . . . . . . . . . . . . . 12
3.2.4 Bandwidth . . . . . . . . . . . . . . . . . . . 12
Ullmann