Interface Stack Table Definition for Point to Point (P2P) Interface over LAN
draft-liu-lsr-p2poverlan-04

Network Working Group                                             D. Liu
Internet-Draft                                                J. Halpern
Intended status: Informational                                  C. Zhang
Expires: 10 June 2022                                           Ericsson
                                                         7 December 2021

Interface Stack Table Definition for Point to Point (P2P) Interface over
                                  LAN
                      draft-liu-lsr-p2poverlan-04

Abstract

   In [RFC5309] defines the P2P circuit type is one of the mainly used
   circuit types in link state routing protocol, and highlights it is
   important to identify the correct circuit type when forming
   adjacencies, flooding link state database packets, and monitor the
   link state.

   P2P Interface over LAN ifType value is assigned by IANA experts
   review.  This document provides an example of the ifStack for P2P
   Interface over LAN ifType to facilitate operational control,
   maintenance and statistics.

Status of This Memo

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   This Internet-Draft will expire on 10 June 2022.

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   This document is subject to BCP 78 and the IETF Trust's Legal
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   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Interface Stack Table for P2P Interface Type  . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     6.1.  Normative references  . . . . . . . . . . . . . . . . . .   4
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   The assignment of a value (303, available at
   https://www.iana.org/assignments/smi-numbers/smi-numbers.xhtml#smi-
   numbers-5) to p2pOverLan ifType was made by expert review.  To
   simplify configuration and operational control, it is helpful to
   represent the fact that an interface is to be considered a P2P
   Interface over LAN type explicitly in the interface stack.  This
   enables, for example, routing protocols to automatically inherit the
   correct operating mode from interface stack without further
   configuration(Not need to explicitly configure P2P Interface in
   routing protocols).

   So it is helpful to map P2P Interface over LAN type in interface
   management stack table.  And if no entry specify P2P Interface lower
   layer, the management will suffer since lose the ability to get to
   the lower layer specific management properties via many tools.

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119] [RFC8174].

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3.  Interface Stack Table for P2P Interface Type

   If the device implements the IF-MIB [RFC2863], each entry in the
   "/interfaces/interface" list (in "Interface Management YANG") in the
   operational state is typically mapped to one ifEntry is required in
   [RFC8343], therefore P2P Interface over LAN type should also fully
   map to one ifEntry by defining the "ifStackTable" ("higher-layer-if"
   and "lower-layer-if").

   P2P interface higher layer should be network layer "ipForward"
   (defined in IANA) to run routing protocol, P2P interface lower layer
   is link data layer "ethernetCsmacd" (defined in IANA).

   P2P interface type ifStackTable can be defined along the lines of
   following example which complies with [RFC8343]:

                    <interface>
                      <name>isis_int</name>
                      <type>ianaift:ipForward</type>
                    </interface>

                    <interface>
                      <name>eth1</name>
                      <type>ianaift:ethernetCsmacd</type>
                    </interface>

                    <interface>
                      <name>p2p</name>
                      <type>ianaift:p2pOverLan</type>
                      <higher-layer-if>isis_int</higher-layer-if>
                      <lower-layer-if>eth1</lower-layer-if>
                      <enabled>false</enabled>
                      <admin-status>down</admin-status>
                      <oper-status>down</oper-status>
                      <statistics>
                        <discontinuity-time>
                          2021-04-01T03:00:00+00:00
                        </discontinuity-time>
                        <!-- counters now shown here -->
                      </statistics>
                    </interface>

                                  Figure 1

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4.  Security Considerations

   The interface stack table specified in this document is read-only.
   Read operation to this table without complete protection shouldn't
   have a negative effect on network operations.

5.  IANA Considerations

   In the Interface Types registry, IANA has previously assigned a value
   of 303 for p2pOverLan with a reference of [RFC5309], as shown in
   following table (available at https://www.iana.org/assignments/smi-
   numbers/smi-numbers.xhtml#smi-numbers-5).  IANA is requested to amend
   the reference to point to this document and to make a similar
   amendment in the YANG iana-if-type module [RFC7224] which currently
   points to [RFC8561], as this document explains how the ifType is to
   be used.

             +=========+==================+==================+
             | Decimal |    Name          |    references    |
             +=========+==================+==================+
             |  303    |  p2pOverLan      |      RFC5309     |
             +---------+------------------+------------------+

                                  Figure 2

6.  References

6.1.  Normative references

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC2863]  McCloghrie, K. and F. Kastenholz, "The Interfaces Group
              MIB", RFC 2863, DOI 10.17487/RFC2863, June 2000,
              <https://www.rfc-editor.org/info/rfc2863>.

   [RFC5309]  Zinin, A. and N. Shen, "Point-to-Point Operation over LAN
              in Link State Routing Protocols", RFC 5309,
              DOI 10.17487/RFC5309, October 2008,
              <https://www.rfc-editor.org/info/rfc5309>.

   [RFC7224]  Bjorklund, M., "IANA Interface Type YANG Module",
              RFC 7224, DOI 10.17487/RFC7224, May 2014,
              <https://www.rfc-editor.org/info/rfc7224>.

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   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", RFC 8174, IETF RFC 8174,
              DOI 10.17487/RFC8174, May 2017,
              <https://www.rfc-editor.org/info/rfc8174>.

   [RFC8343]  Bjorklund, M., "A YANG Data Model for Interface
              Management", RFC 8343, DOI 10.17487/RFC8343, March 2018,
              <https://www.rfc-editor.org/info/rfc8343>.

   [RFC8561]  Ahlberg, J., Ye, M., Li, X., Spreafico, D., and M.
              Ahlberg, "A YANG Data Model for Microwave Radio Link",
              RFC 8561, DOI 10.17487/RFC8561, June 2019,
              <https://www.rfc-editor.org/info/rfc8561>.

6.2.  Informative References

   [RFC6991]  Schoenwaelder, J., "Common YANG Data Types", RFC 6991,
              DOI 10.17487/RFC6991, June 2011,
              <https://www.rfc-editor.org/info/rfc6991>.

   [RFC8340]  Bjorklund, M. and L. Berger, "YANG Tree Diagrams",
              BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
              <https://www.rfc-editor.org/info/rfc8340>.

Authors' Addresses

   Daiying Liu
   Ericsson
   No.5 Lize East street
   Beijing
   100102
   China

   Email: harold.liu@ericsson.com

   Joel Halpern
   Ericsson

   Email: joel.halpern@ericsson.com

   Congjie Zhang
   Ericsson

   Email: congjie.zhang@ericsson.com

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