Numbering Exchange Protocol (NEP) Specification
draft-omar-nep-06

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Document Type Active Internet-Draft (individual)
Authors Khaled Omar  , Luís Câmara 
Last updated 2018-01-30
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Internet Engineering Task Force (IETF)                    Khaled Omar
Internet-Draft                                             The Road
Intended status: Experimental                                  L. Camara
Expires: August 3, 2018                                 January 30, 2018
                                                       

                     Numbering Exchange Protocol (NEP)
                             Specification
                           draft-omar-nep-06

Abstract

   This document specifies the Numbering Exchange Protocol (NEP), an
   Interior Gateway Protocol (IGP) that combines three metrics: delay,
   bandwidth and number of hops.

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Omar & Camara          Expires August 3, 2018                   [Page 1]
Internet-Draft    Numbering Exchange Protocol (NEP)         January 2018

Table of Contents

   1.  Introduction ...................................................2
   2.  Numbering Exchange Protocol (NEP) ..............................3
   2.1.  RIDs and their Advertising ...................................5
   2.1.1.  Advertising Beyond a Router's Neighbours ...................6
   2.2.  Echo Mechanism ...............................................6
   2.2.1.  Detecting Routers that Leaved a NEP Network ................6
   2.3.  Topology Advertisement .......................................7
   2.3.1.  The NEP Metric .............................................8
   3.  NEP Loop Prevention ............................................8
   4.  Subnet Advertisement ...........................................9
   4.1.  Specification ...............................................11
   4.2.  Routing Packets within a NEP AS .............................12
   5.  IANA Considerations ...........................................12
   6.  Security Considerations .......................................13
   7.  References ....................................................13
   7.1.  Normative References ........................................13
   7.2.  Informative References ......................................13
   8.  Authors' Addresses ............................................14
   Appendix A.  NEP Advertisement Format .............................14
   A.1.  NEP Header ..................................................14
   A.2.  Topology Advertisement ......................................15
   A.3.  Subnet Advertisements .......................................15
   A.3.1.  Mask-Based Subnet Advertisements ..........................16
   A.3.2.  Prefix-Based Subnet Advertisements ........................16
   A.4.  Echo Mechanism ..............................................17
   A.4.1.  Echo Messages .............................................17
   A.4.2.  Delay Calculated Message ..................................17
   A.5.  Hello Messages ..............................................17
   A.6.  Router Left Message .........................................18

1.  Introduction

   The Numbering Exchange Protocol (NEP) is an Interior Gateway
   Protocol (IGP), delivering IP packets between routers in the same
   Autonomous System (AS).

   Many routing protocols, such as RIP, OSPF, IS-IS, and EIGRP, use
   normally one or even zero metrics each:

      a. RIP uses only the number of hops.
      b. OSPF uses only the cost (bandwidth).
      c. IS-IS uses only a default metric of 10 for all links.
      d. EIGRP uses the least bandwidth and delay.

   NEP differs from other IGPs as it chooses its best path based on a
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