Internet-Draft IPFIX NRP June 2023
Liu Expires 30 December 2023 [Page]
Workgroup:
OPSAWG Working Group
Internet-Draft:
draft-liu-opsawg-ipfix-network-slice-00
Published:
Intended Status:
Standards Track
Expires:
Author:
Y. Liu
ZTE

Export of Network Resource Partition (NRP) Information in IP Flow Information Export (IPFIX)

Abstract

This document introduces new IP Flow Information Export (IPFIX) Information Elements to identify the Network Resource Partition (NRP) that the network slice traffic is related with.

Status of This Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.

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."

This Internet-Draft will expire on 30 December 2023.

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Table of Contents

1. Introduction

The definition of the IETF Network Slice and the general principles of network slicing in the IETF context are specified in [I-D.ietf-teas-ietf-network-slices]. As described in [I-D.ietf-teas-ietf-network-slices], an IETF Network Slice enables connectivity between a set of Service Demarcation Points (SDPs) with specific Service Level Objectives (SLOs) and Service Level Expectations (SLEs) over a common underlay network. To meet the connectivity and performance requirements, network slice services needs to be mapped to a Network Resource Partition (NRP). An NRP is a collection of resources (bufferage, queuing, scheduling, etc.) in the underlay network.

As introduced in [I-D.ietf-teas-ns-ip-mpls], each NRP can be idenified using a unique NRP-ID in control plane and management plane. And the NRP-ID may also be encapsulated in data packet to guide the NRP-specific packet forwarding.

This document defines new IPFIX Information Elements within the "IPFIX Information Elements" registry [RFC7012] to identify the Network Resource Partition (NRP) that the network slice traffic is related with.

2. Terminology

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119][RFC8174] when, and only when, they appear in all capitals, as shown here.

3. New IPFIX Information Element

This section defines and describes the new IPFIX IE.

4. Usecases

A typical usecase scenario is to monitoring the network slice traffic that is forwarded based on NRP specific resource-aware segments [I-D.ietf-spring-resource-aware-segments] that operate over SR-MPLS or SRv6 dataplanes. By looking at the SID itself, it is not always clear as to which NRP it belongs.

Another usecase is the monitoring of the network slice traffic whose NRP-ID is encapsulated in data packet to determine the Network Resource Partition Per Hop Behavior.

By using nrpIdentifier(TBD1), and some counters information, it is possible to answer the following questions (amongst others):

5. IANA Considerations

This document requests IANA to add a new IE to the "IPFIX Information Elements" registry [RFC7012] available at [IANA-IPFIX].

       -----------------------------------------------------
       | ElementID|       Name           |  Reference      |
       |---------------------------------------------------|
       | TBD1     |       NRP-ID         |  This document  |
       |---------------------------------------------------|

6. Security Considerations

There exists no significant extra security considerations regarding the allocation of these new IPFIX IEs compared to [RFC7012].

7. References

7.1. Normative References

[I-D.ietf-teas-ns-ip-mpls]
Saad, T., Beeram, V. P., Dong, J., Wen, B., Ceccarelli, D., Halpern, J. M., Peng, S., Chen, R., Liu, X., Contreras, L. M., Rokui, R., and L. Jalil, "Realizing Network Slices in IP/MPLS Networks", Work in Progress, Internet-Draft, draft-ietf-teas-ns-ip-mpls-02, , <https://datatracker.ietf.org/doc/html/draft-ietf-teas-ns-ip-mpls-02>.
[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/info/rfc2119>.
[RFC7012]
Claise, B., Ed. and B. Trammell, Ed., "Information Model for IP Flow Information Export (IPFIX)", RFC 7012, DOI 10.17487/RFC7012, , <https://www.rfc-editor.org/info/rfc7012>.
[RFC8174]
Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <https://www.rfc-editor.org/info/rfc8174>.

7.2. Informative References

[I-D.ietf-spring-resource-aware-segments]
Dong, J., Bryant, S., Miyasaka, T., Zhu, Y., Qin, F., Li, Z., and F. Clad, "Introducing Resource Awareness to SR Segments", Work in Progress, Internet-Draft, draft-ietf-spring-resource-aware-segments-07, , <https://datatracker.ietf.org/doc/html/draft-ietf-spring-resource-aware-segments-07>.
[I-D.ietf-teas-ietf-network-slices]
Farrel, A., Drake, J., Rokui, R., Homma, S., Makhijani, K., Contreras, L. M., and J. Tantsura, "A Framework for IETF Network Slices", Work in Progress, Internet-Draft, draft-ietf-teas-ietf-network-slices-21, , <https://datatracker.ietf.org/doc/html/draft-ietf-teas-ietf-network-slices-21>.
[IANA-IPFIX]
"IANA, "IP Flow Information Export (IPFIX) Entities"", <https://www.iana.org/assignments/ipfix/ipfix.xhtml>.

Author's Address

Yao Liu
ZTE
Nanjing
China