draft-ietf-mpls-spring-entropy-label-00.txt   draft-ietf-mpls-spring-entropy-label-01.txt 
Network Working Group S. Kini, Ed. Network Working Group S. Kini, Ed.
Internet-Draft Ericsson Internet-Draft Ericsson
Intended status: Informational K. Kompella Intended status: Informational K. Kompella
Expires: September 6, 2015 Juniper Expires: March 9, 2016 Juniper
S. Sivabalan S. Sivabalan
Cisco Cisco
S. Litkowski S. Litkowski
Orange Orange
R. Shakir R. Shakir
B.T.
X. Xu X. Xu
Huawei Huawei
W. Hendrickx W. Hendrickx
Alcatel-Lucent Alcatel-Lucent
J. Tantsura J. Tantsura
Ericsson Ericsson
March 5, 2015 September 6, 2015
Entropy labels for source routed stacked tunnels Entropy labels for source routed stacked tunnels
draft-ietf-mpls-spring-entropy-label-00 draft-ietf-mpls-spring-entropy-label-01
Abstract Abstract
Source routed tunnel stacking is a technique that can be leveraged to Source routed tunnel stacking is a technique that can be leveraged to
provide a method to steer a packet through a controlled set of provide a method to steer a packet through a controlled set of
segments. This can be applied to the Multi Protocol Label Switching segments. This can be applied to the Multi Protocol Label Switching
(MPLS) data plane. Entropy label (EL) is a technique used in MPLS to (MPLS) data plane. Entropy label (EL) is a technique used in MPLS to
improve load balancing. This document examines and describes how ELs improve load balancing. This document examines and describes how ELs
are to be applied to source routed stacked tunnels. are to be applied to source routed stacked tunnels.
skipping to change at page 1, line 48 skipping to change at page 1, line 48
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 6, 2015. This Internet-Draft will expire on March 9, 2016.
Copyright Notice Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
skipping to change at page 2, line 52 skipping to change at page 3, line 4
1. Introduction 1. Introduction
The source routed stacked tunnels paradigm is leveraged by techniques The source routed stacked tunnels paradigm is leveraged by techniques
such as Segment Routing (SR) [I-D.filsfils-spring-segment-routing] to such as Segment Routing (SR) [I-D.filsfils-spring-segment-routing] to
steer a packet through a set of segments. This can be directly steer a packet through a set of segments. This can be directly
applied to the MPLS data plane, but it has implications on label applied to the MPLS data plane, but it has implications on label
stack depth. stack depth.
Clarifying statements on label stack depth have been provided in Clarifying statements on label stack depth have been provided in
[RFC7325] but they do not address the case of source routed stacked [RFC7325] but they do not address the case of source routed stacked
MPLS tunnels as described in [I-D.gredler-spring-mpls] or MPLS tunnels as described in [I-D.filsfils-spring-segment-routing]
where deeper label stacks are more prevalent.
[I-D.filsfils-spring-segment-routing] where deeper label stacks are
more prevalent.
Entropy label (EL) [RFC6790] is a technique used in the MPLS data Entropy label (EL) [RFC6790] is a technique used in the MPLS data
plane to provide entropy for load balancing. When using LSP plane to provide entropy for load balancing. When using LSP
hierarchies there are implications on how [RFC6790] should be hierarchies there are implications on how [RFC6790] should be
applied. One such issue is addressed by applied. One such issue is addressed by
[I-D.ravisingh-mpls-el-for-seamless-mpls] but that is when different [I-D.ravisingh-mpls-el-for-seamless-mpls] but that is when different
levels of the hierarchy are created at different LSRs. The current levels of the hierarchy are created at different LSRs. The current
document addresses the case where the hierarchy is created at a document addresses the case where the hierarchy is created at a
single LSR as required by source stacked tunnels. single LSR as required by source stacked tunnels.
skipping to change at page 9, line 40 skipping to change at page 9, line 40
9.1. Normative References 9.1. Normative References
[I-D.filsfils-spring-segment-routing] [I-D.filsfils-spring-segment-routing]
Filsfils, C., Previdi, S., Bashandy, A., Decraene, B., Filsfils, C., Previdi, S., Bashandy, A., Decraene, B.,
Litkowski, S., Horneffer, M., Milojevic, I., Shakir, R., Litkowski, S., Horneffer, M., Milojevic, I., Shakir, R.,
Ytti, S., Henderickx, W., Tantsura, J., and E. Crabbe, Ytti, S., Henderickx, W., Tantsura, J., and E. Crabbe,
"Segment Routing Architecture", draft-filsfils-spring- "Segment Routing Architecture", draft-filsfils-spring-
segment-routing-04 (work in progress), July 2014. segment-routing-04 (work in progress), July 2014.
[I-D.gredler-spring-mpls]
Gredler, H., Rekhter, Y., Jalil, L., Kini, S., and X. Xu,
"Supporting Source/Explicitly Routed Tunnels via Stacked
LSPs", draft-gredler-spring-mpls-06 (work in progress),
May 2014.
[I-D.ravisingh-mpls-el-for-seamless-mpls] [I-D.ravisingh-mpls-el-for-seamless-mpls]
Singh, R., Shen, Y., and J. Drake, "Entropy label for Singh, R., Shen, Y., and J. Drake, "Entropy label for
seamless MPLS", draft-ravisingh-mpls-el-for-seamless- seamless MPLS", draft-ravisingh-mpls-el-for-seamless-
mpls-04 (work in progress), October 2014. mpls-04 (work in progress), October 2014.
[I-D.xu-isis-mpls-elc] [I-D.xu-isis-mpls-elc]
Xu, X., Kini, S., Sivabalan, S., Filsfils, C., and S. Xu, X., Kini, S., Sivabalan, S., Filsfils, C., and S.
Litkowski, "Signaling Entropy Label Capability Using IS- Litkowski, "Signaling Entropy Label Capability Using IS-
IS", draft-xu-isis-mpls-elc-01 (work in progress), IS", draft-xu-isis-mpls-elc-02 (work in progress), April
September 2014. 2015.
[I-D.xu-ospf-mpls-elc] [I-D.xu-ospf-mpls-elc]
Xu, X., Kini, S., Sivabalan, S., Filsfils, C., and S. Xu, X., Kini, S., Sivabalan, S., Filsfils, C., and S.
Litkowski, "Signaling Entropy Label Capability Using Litkowski, "Signaling Entropy Label Capability Using
OSPF", draft-xu-ospf-mpls-elc-01 (work in progress), OSPF", draft-xu-ospf-mpls-elc-01 (work in progress),
October 2014. October 2014.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997. Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>.
[RFC4206] Kompella, K. and Y. Rekhter, "Label Switched Paths (LSP) [RFC4206] Kompella, K. and Y. Rekhter, "Label Switched Paths (LSP)
Hierarchy with Generalized Multi-Protocol Label Switching Hierarchy with Generalized Multi-Protocol Label Switching
(GMPLS) Traffic Engineering (TE)", RFC 4206, October 2005. (GMPLS) Traffic Engineering (TE)", RFC 4206,
DOI 10.17487/RFC4206, October 2005,
<http://www.rfc-editor.org/info/rfc4206>.
[RFC6790] Kompella, K., Drake, J., Amante, S., Henderickx, W., and [RFC6790] Kompella, K., Drake, J., Amante, S., Henderickx, W., and
L. Yong, "The Use of Entropy Labels in MPLS Forwarding", L. Yong, "The Use of Entropy Labels in MPLS Forwarding",
RFC 6790, November 2012. RFC 6790, DOI 10.17487/RFC6790, November 2012,
<http://www.rfc-editor.org/info/rfc6790>.
9.2. Informative References 9.2. Informative References
[I-D.filsfils-spring-segment-routing-use-cases] [I-D.filsfils-spring-segment-routing-use-cases]
Filsfils, C., Francois, P., Previdi, S., Decraene, B., Filsfils, C., Francois, P., Previdi, S., Decraene, B.,
Litkowski, S., Horneffer, M., Milojevic, I., Shakir, R., Litkowski, S., Horneffer, M., Milojevic, I., Shakir, R.,
Ytti, S., Henderickx, W., Tantsura, J., Kini, S., and E. Ytti, S., Henderickx, W., Tantsura, J., Kini, S., and E.
Crabbe, "Segment Routing Use Cases", draft-filsfils- Crabbe, "Segment Routing Use Cases", draft-filsfils-
spring-segment-routing-use-cases-01 (work in progress), spring-segment-routing-use-cases-01 (work in progress),
October 2014. October 2014.
[I-D.ietf-isis-segment-routing-extensions] [I-D.ietf-isis-segment-routing-extensions]
Previdi, S., Filsfils, C., Bashandy, A., Gredler, H., Previdi, S., Filsfils, C., Bashandy, A., Gredler, H.,
Litkowski, S., Decraene, B., and J. Tantsura, "IS-IS Litkowski, S., Decraene, B., and J. Tantsura, "IS-IS
Extensions for Segment Routing", draft-ietf-isis-segment- Extensions for Segment Routing", draft-ietf-isis-segment-
routing-extensions-03 (work in progress), October 2014. routing-extensions-05 (work in progress), June 2015.
[I-D.ietf-ospf-segment-routing-extensions] [I-D.ietf-ospf-segment-routing-extensions]
Psenak, P., Previdi, S., Filsfils, C., Gredler, H., Psenak, P., Previdi, S., Filsfils, C., Gredler, H.,
Shakir, R., Henderickx, W., and J. Tantsura, "OSPF Shakir, R., Henderickx, W., and J. Tantsura, "OSPF
Extensions for Segment Routing", draft-ietf-ospf-segment- Extensions for Segment Routing", draft-ietf-ospf-segment-
routing-extensions-04 (work in progress), February 2015. routing-extensions-05 (work in progress), June 2015.
[RFC7325] Villamizar, C., Kompella, K., Amante, S., Malis, A., and [RFC7325] Villamizar, C., Ed., Kompella, K., Amante, S., Malis, A.,
C. Pignataro, "MPLS Forwarding Compliance and Performance and C. Pignataro, "MPLS Forwarding Compliance and
Requirements", RFC 7325, August 2014. Performance Requirements", RFC 7325, DOI 10.17487/RFC7325,
August 2014, <http://www.rfc-editor.org/info/rfc7325>.
Authors' Addresses Authors' Addresses
Sriganesh Kini (editor) Sriganesh Kini (editor)
Ericsson Ericsson
Email: sriganesh.kini@ericsson.com Email: sriganesh.kini@ericsson.com
Kireeti Kompella Kireeti Kompella
Juniper Juniper
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Cisco Cisco
Email: msiva@cisco.com Email: msiva@cisco.com
Stephane Litkowski Stephane Litkowski
Orange Orange
Email: stephane.litkowski@orange.com Email: stephane.litkowski@orange.com
Rob Shakir Rob Shakir
B.T.
Email: rob.shakir@bt.com Email: rjs@rob.sh
Xiaohu Xu Xiaohu Xu
Huawei Huawei
Email: xuxiaohu@huawei.com Email: xuxiaohu@huawei.com
Wim Hendrickx Wim Hendrickx
Alcatel-Lucent Alcatel-Lucent
Email: wim.henderickx@alcatel-lucent.com Email: wim.henderickx@alcatel-lucent.com
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