ISIS Extensions for Flexible Ethernet
draft-zcdc-isis-flexe-extention-01

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Last updated 2017-07-03
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Network Working Group                                             Y. Zhu
Internet-Draft                                                   H. Chen
Intended status: Standards Track                           China Telecom
Expires: January 4, 2018                                           Z. Du
                                                                 M. Chen
                                                                  Huawei
                                                            July 3, 2017

                 ISIS Extensions for Flexible Ethernet
                   draft-zcdc-isis-flexe-extention-01

Abstract

   This document specifies the extensions to the IS-IS routing protocol
   to carry and flood Flex Ethernet (FlexE) link state information.  The
   FlexE link state information is necessary for a node or a controller
   to compute a path that is required to over FlexE links.

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 RFC 2119 [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 4, 2018.

Copyright Notice

   Copyright (c) 2017 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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  FlexE Link Advertisement  . . . . . . . . . . . . . . . . . .   3
   3.  FlexE Sub-link Advertisement  . . . . . . . . . . . . . . . .   6
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  FlexE Switching Type  . . . . . . . . . . . . . . . . . .   6
     4.2.  FlexE LSP Encoding Type . . . . . . . . . . . . . . . . .   6
     4.3.  FlexE Interface Sub-TLV . . . . . . . . . . . . . . . . .   7
   5.  Security Consideration  . . . . . . . . . . . . . . . . . . .   7
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Flex Ethernet (FlexE) [I-D.izh-ccamp-flexe-fwk] provides a generic
   mechanism for supporting a variety of Ethernet MAC rates that may or
   may not correspond to any existing Ethernet PHY rate.  This includes
   MAC rates that are both greater than (through bonding) and less than
   (through sub-rate and channelization) the Ethernet PHY rates used to
   carry Ethernet traffic.

   FlexE supports interface bonding, a bonded interface is consisted of
   from 1 to n 100GBASE-R PHYs (other types of PHY will be supported in
   the future), the bonded interface is called FlexE interface in this
   document.  FlexE also supports interface channelization, a FlexE
   interface can be channelized into multiple sub-interfaces, the sub-
   interface is called FlexE sub-interface in the rest of this document.

   The FlexE mechanism operates using a calendar which assigns 66B block
   positions on sub-calendars on each PHY of a FlexE interface to each
   of the FlexE flows.  The calendar has a granularity of 5G, and has a
   length of 20 slots for a 100G interface.  Currently, only 100GBASE-R
   PHY and 5G granularity are supported in FlexE implementation

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