Simple Segment Routing Header
draft-herbert-simple-sr-00

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INTERNET-DRAFT                                                T. Herbert
Intended Status: Standard                                     Quantonium
Expires: September 2019                                                 
                                                                        
                                                          March 11, 2019

                     Simple Segment Routing Header
                       draft-herbert-simple-sr-00

Abstract

   This specification defines a simple extension header format for
   Segment Routing based on the current definition of the Segment
   Routing extension header defined for IPv6. A Segment Identifier type
   field is added so that the segment list might contain values other
   than IPv6 addresses. Optional TLVs in the segment routing header are
   eliminated; Destination options that precede the routing header are
   sufficient. Two new destination options are defined: one for Routing
   header security and another to specify that certain destinations
   should process certain options.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
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Copyright and License Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
 

T. Herbert             Expires September 12, 2019               [Page 1]
INTERNET DRAFT         draft-herbert-simple-sr-00         March 11, 2019

   document authors. All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2  Simple segment routing header format  . . . . . . . . . . . . .  4
     2.1 SType values . . . . . . . . . . . . . . . . . . . . . . . .  4
   3  Routing header security option  . . . . . . . . . . . . . . . .  5
     3.1 HMAC Routing header security . . . . . . . . . . . . . . . .  7
     3.2 Operation  . . . . . . . . . . . . . . . . . . . . . . . . .  7
       3.2.1 Sender operation . . . . . . . . . . . . . . . . . . . .  7
       3.2.2 Receiver operation . . . . . . . . . . . . . . . . . . .  7
   4  Process per segment Destination Option  . . . . . . . . . . . .  8
     4.1 Sender operation . . . . . . . . . . . . . . . . . . . . . .  9
     4.2 Receiver operation . . . . . . . . . . . . . . . . . . . . .  9
   5  Security Considerations . . . . . . . . . . . . . . . . . . . . 10
   6  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 10
   7  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     7.1  Normative References  . . . . . . . . . . . . . . . . . . . 10
     7.2  Informative References  . . . . . . . . . . . . . . . . . . 10
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 10

 

T. Herbert             Expires September 12, 2019               [Page 2]
INTERNET DRAFT         draft-herbert-simple-sr-00         March 11, 2019

1  Introduction

   This specification defines a simplified segment routing header and
   generalizes some aspects of segment routing to be applicable to other
   types of routing headers. The segment routing header is defined in
   [SRHV6].

   The following modifications and additions are defined:

      * A Segment Identifier type field in the Segment routing header. 

        This field indicates the type of elements in the segment routing
        list and also indicates the length of each element. Segment
        Identifier types are defined for IPv6 and IPv4 addresses, as
        well as types for indices into tables that would map a Segment
        Identifier to an address. The concept of types for Segment
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