PCE Working Group D. Dhody
Internet-Draft U. Palle
Intended status: Standards Track Huawei Technologies India Pvt
Expires: August 25, 2013 Ltd
February 21, 2013
ISIS Protocol Extensions for Boundary Node Discovery (BND)
draft-dhody-pce-bn-discovery-isis-06
Abstract
The Path Computation Element (PCE) may be used for computing multi-
domain (Area or AS) Multiprotocol Label Switching (MPLS) and
Generalized MPLS (GMPLS) Traffic Engineered (TE) Label Switch Path
(LSP).
In this circumstance, it is highly desirable to be able to
dynamically and automatically discover a set of Boundary Nodes (BN)
along with their domain information. For that purpose, this document
defines extensions to the Intermediate System to Intermediate
System(IS-IS) routing protocol for the advertisement of Boundary Node
(BN)Discovery information within an IS-IS area or within the entire
IS-IS routing domain.
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This document is subject to BCP 78 and the IETF Trust's Legal
Dhody & Palle Expires August 25, 2013 [Page 1]
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Applications . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Existing Mechanisms . . . . . . . . . . . . . . . . . . . . . 5
4.1. ISIS . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2. Inter-AS TE Link . . . . . . . . . . . . . . . . . . . . . 6
4.3. ISIS Area Topology . . . . . . . . . . . . . . . . . . . . 6
4.4. HPCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5. Other Considerations . . . . . . . . . . . . . . . . . . . . . 6
5.1. Static Configurations . . . . . . . . . . . . . . . . . . 6
5.2. Importance of Domain Information along with BNs . . . . . 7
5.3. Relationship to Domain-Sequence . . . . . . . . . . . . . 7
6. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1. Boundary Node (BN) Discovery Information . . . . . . . . . 7
6.2. Flooding Scope . . . . . . . . . . . . . . . . . . . . . . 7
7. The IS-IS BND Sub-TLV . . . . . . . . . . . . . . . . . . . . 7
7.1. BN-ADDRESS Sub-TLV . . . . . . . . . . . . . . . . . . . . 8
7.2. BN-DOMAIN Sub-TLV . . . . . . . . . . . . . . . . . . . . 9
8. Elements of Procedure . . . . . . . . . . . . . . . . . . . . 9
9. Backward Compatibility . . . . . . . . . . . . . . . . . . . . 10
10. Impact on Network . . . . . . . . . . . . . . . . . . . . . . 10
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
12. Security Considerations . . . . . . . . . . . . . . . . . . . 11
13. Manageability Considerations . . . . . . . . . . . . . . . . . 11
14. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 11
15. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
15.1. Normative References . . . . . . . . . . . . . . . . . . . 11
15.2. Informative References . . . . . . . . . . . . . . . . . . 11
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