PCE Working Group D. Dhody
Internet-Draft Huawei Technologies India Pvt
Intended status: Standards Track Ltd
Expires: August 24, 2013 V. Manral
Hewlett-Packard Corp.
Z. Ali
G. Swallow
Cisco Systems
K. Kumaki
KDDI Corporation
February 25, 2013
Extensions to the Path Computation Element Communication Protocol (PCEP)
to compute service aware Label Switched Path (LSP).
draft-dhody-pce-pcep-service-aware-05
Abstract
In certain networks like financial information network (stock/
commodity trading) and enterprises using cloud based applications,
Latency (delay), Latency-Variation (jitter) and Packet loss is
becoming a key requirement for path computation along with other
constraints and metrics. Latency, Latency-Variation and Packet Loss
is associated with the Service Level Agreement (SLA) between
customers and service providers.
[MPLS-DELAY-FWK] describes MPLS architecture to allow Latency
(delay), Latency-Variation (jitter) and Packet loss as properties.
[OSPF-TE-EXPRESS] and [ISIS-TE-EXPRESS] describes mechanisms with
which network performance information is distributed via OSPF and
ISIS respectively. This document describes the extension to PCEP to
carry Latency, Latency-Variation and Loss as constraints for end to
end path computation.
Status of This Memo
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Dhody, et al. Expires August 24, 2013 [Page 1]
Internet-Draft SERVICE-AWARE December 2012
material or to cite them other than as "work in progress."
This Internet-Draft will expire on June 4, 2013.
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Dhody, et al. Expires August 24, 2013 [Page 2]
Internet-Draft SERVICE-AWARE December 2012
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. PCEP Requirements . . . . . . . . . . . . . . . . . . . . . . 5
4. PCEP extensions . . . . . . . . . . . . . . . . . . . . . . . 5
4.1. Latency (Delay) Metric . . . . . . . . . . . . . . . . . . 6
4.1.1. Latency (Delay) Metric Value . . . . . . . . . . . . . 6
4.2. Latency Variation (Jitter) Metric . . . . . . . . . . . . 7
4.2.1. Latency Variation (Jitter) Metric Value . . . . . . . 7
4.3. Packet Loss Metric . . . . . . . . . . . . . . . . . . . . 8
4.3.1. Packet Loss Metric Value . . . . . . . . . . . . . . . 9
4.4. Non-Understanding / Non-Support of Service Aware Path
Computation . . . . . . . . . . . . . . . . . . . . . . . 9
4.5. Mode of Operation . . . . . . . . . . . . . . . . . . . . 9
4.5.1. Examples . . . . . . . . . . . . . . . . . . . . . . . 10
5. Relationship with Objective function . . . . . . . . . . . . . 11
6. Protocol Consideration . . . . . . . . . . . . . . . . . . . . 11
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