draft-ietf-spring-oam-usecase-07.txt   draft-ietf-spring-oam-usecase-08.txt 
spring R. Geib, Ed. spring R. Geib, Ed.
Internet-Draft Deutsche Telekom Internet-Draft Deutsche Telekom
Intended status: Informational C. Filsfils Intended status: Informational C. Filsfils
Expires: January 2, 2018 C. Pignataro, Ed. Expires: January 3, 2018 C. Pignataro, Ed.
N. Kumar N. Kumar
Cisco Systems, Inc. Cisco Systems, Inc.
July 1, 2017 July 2, 2017
A Scalable and Topology-Aware MPLS Dataplane Monitoring System A Scalable and Topology-Aware MPLS Dataplane Monitoring System
draft-ietf-spring-oam-usecase-07 draft-ietf-spring-oam-usecase-08
Abstract Abstract
This document describes features of a path monitoring system and This document describes features of a path monitoring system and
related use cases. Segment based routing enables a scalable and related use cases. Segment based routing enables a scalable and
simple method to monitor data plane liveliness of the complete set of simple method to monitor data plane liveliness of the complete set of
paths belonging to a single domain. The MPLS monitoring system adds paths belonging to a single domain. The MPLS monitoring system adds
features to the traditional MPLS Ping and LSP Trace, in a very features to the traditional MPLS Ping and LSP Trace, in a very
complementary way. MPLS topology awareness reduces management and complementary way. MPLS topology awareness reduces management and
control plane involvement of OAM measurements while enabling new OAM control plane involvement of OAM measurements while enabling new OAM
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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 January 2, 2018. This Internet-Draft will expire on January 3, 2018.
Copyright Notice Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the Copyright (c) 2017 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
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document. document.
The PMS is expected to check control plane liveliness after a path The PMS is expected to check control plane liveliness after a path
repair effort was executed. It doesn't matter whether the path repair effort was executed. It doesn't matter whether the path
repair was triggered manually or by an automated system. repair was triggered manually or by an automated system.
6. Applying SR to Monitoring non-SR based LSPs (LDP and possibly RSVP- 6. Applying SR to Monitoring non-SR based LSPs (LDP and possibly RSVP-
TE) TE)
The MPLS path monitoring system described by this document can be The MPLS path monitoring system described by this document can be
realized with pre-Segment Routing (SR) based technology. Making such realized with non-Segment Routing (SR) based technology. Making such
a pre-SR MPLS monitoring system aware of a domain's complete MPLS a non-SR MPLS monitoring system aware of a domain's complete MPLS
topology requires, e.g., management plane access to the routers of topology requires, e.g., management plane access to the routers of
the domain to be monitored or set up of a dedicated tLDP tunnel per the domain to be monitored or set up of a dedicated tLDP tunnel per
router to set up an LDP adjacency. To avoid the use of stale MPLS router to set up an LDP adjacency. To avoid the use of stale MPLS
label information, the IGP must be monitored and MPLS topology must label information, the IGP must be monitored and MPLS topology must
be timely aligned with IGP topology. Enhancing IGPs to exchange of be timely aligned with IGP topology. Enhancing IGPs to exchange of
MPLS topology information as done by SR significantly simplifies and MPLS topology information as done by SR significantly simplifies and
stabilizes such an MPLS path monitoring system. stabilizes such an MPLS path monitoring system.
A SR based PMS connected to a MPLS domain consisting of LER and LSR A SR based PMS connected to a MPLS domain consisting of LER and LSR
supporting SR and LDP or RSVP-TE in parallel in all nodes may use SR supporting SR and LDP or RSVP-TE in parallel in all nodes may use SR
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