IDR R. Chen
Internet-Draft D. Zhao
Intended status: Standards Track ZTE Corporation
Expires: 24 October 2022 22 April 2022
SR Policies Extensions for NRP in BGP-LS
draft-chen-idr-bgp-ls-sr-policy-nrp-00
Abstract
This document defines a new TLV which enable the headed to report the
configuration and the states of SR policies carrying NRP information
by using BPG-LS.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 2
3. Carrying NRP Sub-TLV in BGP-LS . . . . . . . . . . . . . . . 3
4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 3
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
6. Security Considerations . . . . . . . . . . . . . . . . . . . 3
7. Normative References . . . . . . . . . . . . . . . . . . . . 3
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction
SR Policy is an ordered list of segments (i.e. instructions) that
represent a source-routed policy. Packet flows are steered into a SR
Policy on a node where it is instantiated called a headend node. The
packets steered into an SR Policy carry an ordered list of segments
associated with that SR Policy.[I-D.ietf-idr-te-lsp-distribution]
describes a mechanism to distribute traffic engineering policy
information (SR Policies , TE-LSPs, etc) to external components using
BGP-LS.
[I-D.bestbar-teas-ns-packet] introduces a Slice-Flow Aggregate as the
collection of packets (from one or more IETF network slice traffic
streams) that match an NRP Policy selection criteria and are offered
the same forwarding treatment. The NRP Policy is used to realize an
NRP by instantiating specific control and data plane resources on
select topological elements in an IP/MPLS network. The NRP
Identifier (NRP-ID) is globally unique within an NRP domain and that
can be used in the control or management plane to identify the
resources associated with the NRP.
Based on the mechanism defined in [I-D.ietf-idr-te-lsp-distribution],
this document defines a new TLV which enable the headed to report the
configuration and the states of SR policies carrying NRP information
by using BPG-LS.
2. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
cloud transport network: It is usually a national or province
backbone network to achieve interconnection between multiple regional
clouds/core clouds deployed in the country/province.
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3. Carrying NRP Sub-TLV in BGP-LS
[I-D.liu-idr-bgp-network-slicing] and [I-D.dong-idr-sr-policy-nrp]
define extensions to BGP in order to advertise NRP in SR policies.
In order to collect configuration and states of the NRP SR policies,
this document defines a new SR Policy state TLV.
The TLV has the following format:
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length | Flags | RESERVED |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| NRP ID (4 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
where:
Type: TBD1.
Length: 6 octets.
Flags: 1 octet of flags. None are defined at this stage. Flags
SHOULD be set to zero on transmission and MUST be ignored on receipt.
RESERVED: 1 octet of reserved bits. SHOULD be set to zero on
transmission and MUST be ignored on receipt.
NRP: 4 octet global identifier of Network Resource Partition.
4. Acknowledgements
TBD.
5. IANA Considerations
TBD.
6. Security Considerations
TBD.
7. Normative References
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[I-D.bestbar-teas-ns-packet]
Saad, T., Beeram, V. P., Dong, J., Wen, B., Ceccarelli,
D., Halpern, J., 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-bestbar-teas-ns-packet-09, 21 April 2022,
<https://datatracker.ietf.org/doc/html/draft-bestbar-teas-
ns-packet-09>.
[I-D.dong-idr-sr-policy-nrp]
Dong, J., Hu, Z., and R. Pang, "BGP SR Policy Extensions
for Network Resource Partition", Work in Progress,
Internet-Draft, draft-dong-idr-sr-policy-nrp-00, 3 March
2022, <https://datatracker.ietf.org/doc/html/draft-dong-
idr-sr-policy-nrp-00>.
[I-D.ietf-idr-te-lsp-distribution]
Previdi, S., Talaulikar, K., Dong, J., Chen, M., Gredler,
H., and J. Tantsura, "Distribution of Traffic Engineering
(TE) Policies and State using BGP-LS", Work in Progress,
Internet-Draft, draft-ietf-idr-te-lsp-distribution-16, 22
October 2021, <https://datatracker.ietf.org/doc/html/
draft-ietf-idr-te-lsp-distribution-16>.
[I-D.liu-idr-bgp-network-slicing]
Yao, L. and P. Shaofu, "BGP Extensions to Support Packet
Network Slicing in SR Policy", Work in Progress, Internet-
Draft, draft-liu-idr-bgp-network-slicing-01, 15 October
2020, <https://datatracker.ietf.org/doc/html/draft-liu-
idr-bgp-network-slicing-01>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
Authors' Addresses
Ran Chen
ZTE Corporation
Nanjing
China
Email: chen.ran@zte.com.cn
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Detao Zhao
ZTE Corporation
Nanjing
China
Email: zhao.detao@zte.com.cn
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