ICMPv6 errors for discarding packets due to processing limits
draft-herbert-6man-icmp-limits-03

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INTERNET-DRAFT                                                T. Herbert
Intended Status: Standard                                     Quantonium
Expires: July 2018                                                      
                                                                        
                                                        January 15, 2018

     ICMPv6 errors for discarding packets due to processing limits
                   draft-herbert-6man-icmp-limits-03

Abstract

   Network nodes may discard packets if they are unable to process
   protocol headers of packets due to processing constraints or limits.
   When such packets are dropped, the sender receives no indication so
   it cannot take action to address the cause of discarded packets. This
   document defines ICMPv6 errors that can be sent by a node that
   discards packets because it is unable to process the protocol
   headers. A node that receives such an ICMPv6 error may be able to
   modify what it sends in future packets to avoid subsequent packet
   discards.

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) 2018 IETF Trust and the persons identified as the
 

T. Herbert               Expires July 19, 2018                  [Page 1]
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   document authors. All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1 Extension header limits  . . . . . . . . . . . . . . . . . .  3
     1.2 Aggregate header limits  . . . . . . . . . . . . . . . . . .  4
   2  ICMPv6 errors for extension header limits . . . . . . . . . . .  4
     2.1 Format . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.2 Unrecognized Next Header type encountered (code 1) . . . . .  5
     2.3 Extension header too big (code 4)  . . . . . . . . . . . . .  5
     2.4 Extension header chain too long (code 5) . . . . . . . . . .  6
     2.5 Too many options in extension header (code 6)  . . . . . . .  6
   3  ICMPv6 error for aggregate header limits  . . . . . . . . . . .  6
     3.1 Format . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
     3.2 Usage  . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
   4  Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     4.1 Priority of reporting  . . . . . . . . . . . . . . . . . . .  8
     4.2 Host response  . . . . . . . . . . . . . . . . . . . . . . .  8
   5  Security Considerations . . . . . . . . . . . . . . . . . . . .  9
   6  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 10
     6.1 Parameter Problem codes  . . . . . . . . . . . . . . . . . . 10
     6.2 Destination Unreachable codes  . . . . . . . . . . . . . . . 10
   8  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 10
   7  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     7.1  Normative References  . . . . . . . . . . . . . . . . . . . 10
     7.2  Informative References  . . . . . . . . . . . . . . . . . . 11
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 11

 

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1  Introduction

   This document specifies ICMPv6 errors that can be sent when a node
   discards a packet due to it being unable to process the necessary
   protocol headers because of processing constraints or limits. New
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