< draft-chen-ospf-ias-lk-02.txt   draft-chen-ospf-ias-lk-03.txt >
OSPF Working Group H. Chen OSPF Working Group H. Chen
Internet-Draft Huawei Technologies Internet-Draft Futurewei
Intended status: Standards Track M. Toy Intended status: Standards Track M. Toy
Expires: September 6, 2018 Verizon Expires: January 9, 2020 Verizon
X. Liu X. Liu
Jabil Volta Networks
L. Liu L. Liu
Fujitsu Fujitsu
Z. Li Z. Li
China Mobile China Mobile
Y. Yang Y. Yang
Sockrate IBM
March 5, 2018 July 8, 2019
OSPF Extensions for Broadcast Inter-AS TE Link OSPF Extensions for Broadcast Inter-AS TE Link
draft-chen-ospf-ias-lk-02 draft-chen-ospf-ias-lk-03
Abstract Abstract
This document presents extensions to the Open Shortest Path First This document presents extensions to the Open Shortest Path First
(OSPF) for advertising broadcast inter-AS Traffic Engineering (TE) (OSPF) for advertising broadcast inter-AS Traffic Engineering (TE)
links. links.
Status of This Memo Status of This Memo
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provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
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Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
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Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used in This Document . . . . . . . . . . . . . . . 3 2. Conventions Used in This Document . . . . . . . . . . . . . . 3
3. Information on Inter-AS TE Link . . . . . . . . . . . . . . . . 3 3. Information on Inter-AS TE Link . . . . . . . . . . . . . . . 3
4. Extensions to OSPF . . . . . . . . . . . . . . . . . . . . . . 4 4. Extensions to OSPF . . . . . . . . . . . . . . . . . . . . . 3
4.1. sub-TLVs . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.1. sub-TLVs . . . . . . . . . . . . . . . . . . . . . . . . 3
4.2. Procedures . . . . . . . . . . . . . . . . . . . . . . . . 5 4.2. Procedures . . . . . . . . . . . . . . . . . . . . . . . 4
4.2.1. OSPF Router Procedure . . . . . . . . . . . . . . . . . 5 4.2.1. OSPF Router Procedure . . . . . . . . . . . . . . . . 4
4.2.2. Super Node Procedure . . . . . . . . . . . . . . . . . 5 4.2.2. Super Node Procedure . . . . . . . . . . . . . . . . 5
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 6 5. Security Considerations . . . . . . . . . . . . . . . . . . . 5
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
7. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . . 6 7. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 5
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
8.1. Normative References . . . . . . . . . . . . . . . . . . . 6 8.1. Normative References . . . . . . . . . . . . . . . . . . 6
8.2. Informative References . . . . . . . . . . . . . . . . . . 7 8.2. Informative References . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction 1. Introduction
Connections among different Autonomous Systems (ASes) may be point- Connections among different Autonomous Systems (ASes) may be point-
to-point (P2P) links and broadcast links. For a P2P inter-AS TE to-point (P2P) links and broadcast links. For a P2P inter-AS TE
link, RFC 5392 defines a new Opaque LSA, the Inter-AS-TE-v2 LSA, for link, RFC 5392 defines a new Opaque LSA, the Inter-AS-TE-v2 LSA, for
advertising the OSPFv2 link; and a new OSPFv3 LS type, Inter-AS-TE-v3 advertising the OSPFv2 link; and a new OSPFv3 LS type, Inter-AS-TE-v3
LSA, for advertising the OSPFv3 link. LSA, for advertising the OSPFv3 link.
Both the Inter-AS-TE-v2 LSA and Inter-AS-TE-v3 LSA contain one top Both the Inter-AS-TE-v2 LSA and Inter-AS-TE-v3 LSA contain one top
skipping to change at page 5, line 50 skipping to change at page 5, line 20
each of ASes (or domains) through a passive OSPF adjacency between each of ASes (or domains) through a passive OSPF adjacency between
the super node and an ASBR or ABR in the AS or domain. the super node and an ASBR or ABR in the AS or domain.
For a new broadcast link connecting multiple routers with no link ID For a new broadcast link connecting multiple routers with no link ID
configured, when the super node receives an LSA containing the link configured, when the super node receives an LSA containing the link
attached to router X, it stores the link from X into its TED. It attached to router X, it stores the link from X into its TED. It
finds the link's remote end P using the link's local IP address with finds the link's remote end P using the link's local IP address with
network mask. P is a Pseudo node identified by the local IP address network mask. P is a Pseudo node identified by the local IP address
of the DR selected from the routers connected to the link. After of the DR selected from the routers connected to the link. After
finding P, it associates the link attached to X with P and the link finding P, it associates the link attached to X with P and the link
connected to P with X. If P is not found, a new Pseudo node P is connected to P with X. If P is not found, a new Pseudo node P is
created. The super node associates the link attached to X with P and created. The super node associates the link attached to X with P and
the link attached to P with X. This creates a bidirectional the link attached to P with X. This creates a bidirectional
connection between X and P. connection between X and P.
The first router and second router from which the super node receives The first router and second router from which the super node receives
an LSA containing the link are selected as the DR and BDR an LSA containing the link are selected as the DR and BDR
respectively. After the DR is down, the BDR node becomes the DR and respectively. After the DR is down, the BDR node becomes the DR and
the router other than the DR with the largest (or smallest) local IP the router other than the DR with the largest (or smallest) local IP
address connecting to the link is selected as the BDR. address connecting to the link is selected as the BDR.
When the old DR is down and the BDR becomes the new DR, the super When the old DR is down and the BDR becomes the new DR, the super
node updates its TED through removing the link between each of node updates its TED through removing the link between each of
skipping to change at page 6, line 39 skipping to change at page 6, line 10
7. Acknowledgement 7. Acknowledgement
The authors would like to thank all for their valuable comments on The authors would like to thank all for their valuable comments on
this draft. this draft.
8. References 8. References
8.1. Normative References 8.1. Normative References
[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, DOI 10.17487/ Requirement Levels", BCP 14, RFC 2119,
RFC2119, March 1997, DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>. <https://www.rfc-editor.org/info/rfc2119>.
[RFC5392] Chen, M., Zhang, R., and X. Duan, "OSPF Extensions in [RFC5392] Chen, M., Zhang, R., and X. Duan, "OSPF Extensions in
Support of Inter-Autonomous System (AS) MPLS and GMPLS Support of Inter-Autonomous System (AS) MPLS and GMPLS
Traffic Engineering", RFC 5392, DOI 10.17487/RFC5392, Traffic Engineering", RFC 5392, DOI 10.17487/RFC5392,
January 2009, <https://www.rfc-editor.org/info/rfc5392>. January 2009, <https://www.rfc-editor.org/info/rfc5392>.
[RFC5329] Ishiguro, K., Manral, V., Davey, A., and A. Lindem, Ed., [RFC5329] Ishiguro, K., Manral, V., Davey, A., and A. Lindem, Ed.,
"Traffic Engineering Extensions to OSPF Version 3", "Traffic Engineering Extensions to OSPF Version 3",
RFC 5329, DOI 10.17487/RFC5329, September 2008, RFC 5329, DOI 10.17487/RFC5329, September 2008,
skipping to change at page 7, line 21 skipping to change at page 6, line 40
[RFC6805] King, D., Ed. and A. Farrel, Ed., "The Application of the [RFC6805] King, D., Ed. and A. Farrel, Ed., "The Application of the
Path Computation Element Architecture to the Determination Path Computation Element Architecture to the Determination
of a Sequence of Domains in MPLS and GMPLS", RFC 6805, of a Sequence of Domains in MPLS and GMPLS", RFC 6805,
DOI 10.17487/RFC6805, November 2012, DOI 10.17487/RFC6805, November 2012,
<https://www.rfc-editor.org/info/rfc6805>. <https://www.rfc-editor.org/info/rfc6805>.
Authors' Addresses Authors' Addresses
Huaimo Chen Huaimo Chen
Huawei Technologies Futurewei
Boston, MA, Boston, MA
USA USA
EMail: Huaimo.chen@huawei.com EMail: Huaimo.chen@futurewei.com
Mehmet Toy Mehmet Toy
Verizon Verizon
USA USA
EMail: mehmet.toy@verizon.com EMail: mehmet.toy@verizon.com
Xufeng Liu Xufeng Liu
Jabil Volta Networks
McLean, VA McLean, VA
USA USA
EMail: Xufeng_Liu@jabil.com EMail: xufeng.liu.ietf@gmail.com
Lei Liu Lei Liu
Fujitsu Fujitsu
USA USA
EMail: lliu@us.fujitsu.com EMail: liulei.kddi@gmail.com
Zhenqiang Li Zhenqiang Li
China Mobile China Mobile
No.32 Xuanwumenxi Ave., Xicheng District No.32 Xuanwumenxi Ave., Xicheng District
Beijing 100032 Beijing 100032
P.R. China P.R. China
EMail: li_zhenqiang@hotmail.com EMail: li_zhenqiang@hotmail.com
Yi Yang Yi Yang
Sockrate IBM
NC NC
USA USA
EMail: yyang1998@gmail.com EMail: yyang1998@gmail.com
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