ISIS Extensions in Support of Inter-Autonomous System (AS) MPLS and GMPLS Traffic Engineering
draft-chen-isis-rfc5316bis-02
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Internet Engineering Task Force M. Chen
Internet-Draft Huawei
Intended status: Standards Track L. Ginsberg
Expires: July 8, 2017 S. Previdi
Cisco Systems
D. Xiaodong
China Mobile
January 4, 2017
ISIS Extensions in Support of Inter-Autonomous System (AS) MPLS and
GMPLS Traffic Engineering
draft-chen-isis-rfc5316bis-02
Abstract
This document describes extensions to the ISIS (ISIS) protocol to
support Multiprotocol Label Switching (MPLS) and Generalized MPLS
(GMPLS) Traffic Engineering (TE) for multiple Autonomous Systems
(ASes). It defines ISIS-TE extensions for the flooding of TE
information about inter-AS links, which can be used to perform inter-
AS TE path computation.
No support for flooding information from within one AS to another AS
is proposed or defined in this document.
This document obsoletes [RFC5316]
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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
Chen, et al. Expires July 8, 2017 [Page 1]
Internet-Draft ISIS Extensions for Inter-AS TE January 2017
This Internet-Draft will expire on July 8, 2017.
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
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
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 . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 4
2.1. A Note on Non-Objectives . . . . . . . . . . . . . . . . 4
2.2. Per-Domain Path Determination . . . . . . . . . . . . . . 4
2.3. Backward Recursive Path Computation . . . . . . . . . . . 6
3. Extensions to ISIS-TE . . . . . . . . . . . . . . . . . . . . 7
3.1. Inter-AS Reachability TLV . . . . . . . . . . . . . . . . 8
3.2. TE Router ID . . . . . . . . . . . . . . . . . . . . . . 9
3.3. Sub-TLVs for Inter-AS Reachability TLV . . . . . . . . . 10
3.3.1. Remote AS Number Sub-TLV . . . . . . . . . . . . . . 10
3.3.2. IPv4 Remote ASBR ID Sub-TLV . . . . . . . . . . . . . 10
3.3.3. IPv6 Remote ASBR ID Sub-TLV . . . . . . . . . . . . . 11
3.3.4. IPv6 Router ID sub-TLV . . . . . . . . . . . . . . . 12
3.4. Sub-TLVs for IS-IS Router Capability TLV . . . . . . . . 13
3.4.1. IPv4 TE Router ID sub-TLV . . . . . . . . . . . . . . 13
3.4.2. IPv6 TE Router ID sub-TLV . . . . . . . . . . . . . . 13
4. Procedure for Inter-AS TE Links . . . . . . . . . . . . . . . 14
4.1. Origin of Proxied TE Information . . . . . . . . . . . . 15
5. Security Considerations . . . . . . . . . . . . . . . . . . . 15
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
6.1. Inter-AS Reachability TLV . . . . . . . . . . . . . . . . 16
6.2. Sub-TLVs for the Inter-AS Reachability TLV . . . . . . . 17
6.3. Sub-TLVs for the IS-IS Router Capability TLV . . . . . . 17
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