Network Working Group E. Roch
Internet Draft Ciena
Intended status: Informational T. Marcot
Expires: April 2011 France Telecom
L. Ong
Ciena
October 18, 2010
Extensions to Hierarchical LSPs for Multi-Client Support
draft-roch-ccamp-lsp-hier-multi-client-00.txt
Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with
the provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
Drafts.
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."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
This Internet-Draft will expire on April 18, 2011.
Copyright Notice
Copyright (c) 2010 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.
Roch, Marcot & Ong Expires April 18, 2011 [Page 1]
Internet-Draft draft-roch-ccamp-lsp-hier-multi-client October 2010
Abstract
A set of requirements and a proposed solution for the control of
hierarchical Label Switched Paths (LSPs) is found in [HIER].
However, support of multiple client layer networks are not covered
by [HIER]. This internet draft describes additional requirements and
proposes a solution to support multiple client layer networks.
Table of Contents
1. Introduction and Problem Statement.............................2
2. Requirements...................................................2
3. Mechanisms and Protocol Extensions.............................2
4. Security Considerations........................................3
5. IANA Considerations............................................3
6. References.....................................................3
6.1. Normative References......................................3
6.2. Informative References.........Error! Bookmark not defined.
7. Acknowledgments................................................4
1. Introduction and Problem Statement
[HIER] defines a set of extensions for the control of hierarchical
Label Switched Paths (LSPs).It allows an LSP created in one network,
i.e. server network, to be used in another network, i.e. client
network. The LSP_TUNNEL_INTERFACE_ID is used during server network
LSP establishment to exchange information about how to identify and
optionally advertise the link in the client network.
2. Requirements
In order to support flexible adaptation where a server network LSP
provides services to multiple client networks, it is necessary to
identify to which layer the information carried in the
LSP_TUNNEL_INTERFACE_ID applies to. For example, an OTN LSP is
established and is available to carry Ethernet or SDH client
traffic.
New Requirement: For each client network supported, it should be
possible to exchange both the layer identification and a separate
set of control plane identifiers associated with the client layer.
3. Mechanisms and Protocol Extensions
The extension continues to use the current format for
LSP_TUNNEL_INTERFACE_ID object as defined in [HIER], and just adds a
Roch, Marcot & Ong Expires April 18, 2011 [Page 2]
Internet-Draft draft-roch-ccamp-lsp-hier-multi-client October 2010
new sub-TLV that identifies the specific client layer(s) that should
use the information exchanged in the LSP_TUNNEL_INTERFACE_ID. This
allows a single LSP_TUNNEL_INTERFACE_ID to carry information for
multiple client layers if they share common control information.
Several LSP_TUNNEL_INTERFACE_ID objects are required when there are
client layers with different control plane identifier information.
A new CLIENT_LAYER_ID_SUB_TLV Object is defined to indicate to which
client layer(s) the LSP_TUNNEL_INTERFACE_ID is applicable. The TLV
is formatted as described in Section 3.1.2 of [HIER]. The Type field
has the value 3 (TBD), and the Value field has the following
content:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Encoding Type | Switching Type| Signal Type | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Encoding Type | Switching Type| Signal Type | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
4. Security Considerations
TBD
5. IANA Considerations
TBD
6. References
6.1. Normative References
[HIER] Shiomoto, K., and Farrel, A. (Editors), ''Procedures for
Dynamically Signaled Hierarchical Label Switched Paths'',
draft-ietf-ccamp-lsp-hierarchy-bis-08.txt, February 2010
[RFC4258] Brungard, D, Ed. ''Requirements for Generalized Multi-
Protocol Label Switching (GMPLS) Routing for the
Automatically Switched Optical Network (ASON)'', RFC4258,
November 2005
[RFC4652] Papadimitriou, D., Ed. ''Evaluation of Existing Routing
Protocols against Automatic Switched Optical Network
(ASON) Routing Requirements'', RFC4652, October 2006
Roch, Marcot & Ong Expires April 18, 2011 [Page 3]
Internet-Draft draft-roch-ccamp-lsp-hier-multi-client October 2010
7. Acknowledgments
The authors would like to thank Vishnu Shukla (Verizon) and Fatai Zhang
(Huawei) for their contribution and comments to this document.
Roch, Marcot & Ong Expires April 18, 2011 [Page 4]
Internet-Draft draft-roch-ccamp-lsp-hier-multi-client October 2010
Authors' Addresses
Evelyne Roch
Ciena
Email: eroch@ciena.com
Thierry Marcot
France Telecom
Email: thierry.marcot@orange-ftgroup.com
Lyndon Ong
Ciena
Email: lyong@ciena.com
Roch, Marcot & Ong Expires April 18, 2011 [Page 5]