Internet DRAFT - draft-hegde-idr-bgpls-ip-flex-algo-bw-con
draft-hegde-idr-bgpls-ip-flex-algo-bw-con
SPRING S. Hegde
Internet-Draft Juniper Networks Inc.
Intended status: Standards Track P. Psenak
Expires: 14 September 2023 Cisco Systems
B. Decraene
Orange
13 March 2023
BGP-LS extensions for IP Flexible Algorithms and Bandwidth, Delay,
Metrics and Constraints
draft-hegde-idr-bgpls-ip-flex-algo-bw-con-00
Abstract
Flexible Algorithm is a mechanism that allows Link state routing
protocols (viz. OSPF and IS-IS) to compute paths over a network
based on user-defined (and hence, flexible) constraints and metrics.
The computation is performed by routers participating in the specific
network in a distributed manner using a Flexible Algorithm
definition. This definition provisioned on one or more routers and
propagated (viz. OSPF and IS- IS flooding) through the network. IP
Flex-algo enables these constraint based paths to be built in a
network which is purely IP and does not support MPLS or SRv6
forwarding plane. BGP Link-State (BGP-LS) enables the collection of
various topology information from the network. This draft defines
extensions to BGP- LS address-family to advertise bandwidth, delay
and metric related constraints in Flexible algorithm definition. It
also defines BGP-LS extensions required to advertise IP flexible
algorithm related extensions in BGP-LS.
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].
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/.
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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 14 September 2023.
Copyright Notice
Copyright (c) 2023 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document. Code Components
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provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Generic Metric Advertisement in BGP-LS . . . . . . . . . . . 3
2.1. BGP-LS Generic Metric TLV . . . . . . . . . . . . . . . . 4
3. BGP-LS FAD constraint sub-TLVs . . . . . . . . . . . . . . . 4
3.1. Flexible Algorithm Exclude Minimum Bandwidth . . . . . . 4
3.2. Flexible Algorithm Exclude Maximum Delay . . . . . . . . 5
3.3. Flexible Algorithm Reference Bandwidth . . . . . . . . . 5
3.4. Flexible Algorithm Bandwidth Threshold . . . . . . . . . 6
4. BGP-LS IP Algorithm TLV . . . . . . . . . . . . . . . . . . . 8
5. BGP-LS IP Algorithm Prefix Reachability TLV . . . . . . . . . 8
6. Backward Compatibility . . . . . . . . . . . . . . . . . . . 9
7. Security Considerations . . . . . . . . . . . . . . . . . . . 9
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
8.1. BGP-LS NLRI and Attribute TLVs . . . . . . . . . . . . . 9
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 10
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
10.1. Normative References . . . . . . . . . . . . . . . . . . 10
10.2. Informative References . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
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1. Introduction
Flexible Algorithm [RFC9350] is defined as a set of parameters
consisting of calculation-type, metric-type and a set of constraints
for allowing operators to have more control over the network path
computation. [I-D.ietf-lsr-flex-algo-bw-con] defines further
extensions to Flexible Algorithm that will allow operators additional
control over their traffic flow, especially with respect to
constraints about metric, delay and bandwidth.
[I-D.ietf-lsr-ip-flexalgo] enables constraint based paths to be built
in a network which is purely IP and does not support MPLS or SRv6
forwarding plane.
This document defines BGP-LS related extensions to carry the
information specific to Flexible Algorithms delay and bandwidth
constraints as well as extensions related to IP Flexible-Algorithms.
2. Generic Metric Advertisement in BGP-LS
Generic Metric as defined in [I-D.ietf-lsr-flex-algo-bw-con] is
advertised as a Link attribute [RFC7752]. The Generic Metric may be
either sourced from ISIS, OSPFv2 or OSPFv3. When the Generic Metric
is sourced from below TLVs in ISIS
TLV-22 (Extended IS reachability) [RFC5305]
TLV-222 (MT-ISN) [RFC5120]
TLV-23 (IS Neighbor Attribute) [RFC5311]
TLV-223 (MT IS Neighbor Attribute) [RFC5311]
TLV-141 (inter-AS reachability information) [RFC5316]
OR
is sourced from below TLVs in OSPF
sub-TLV of the OSPF Link TLV of OSPF extended Link LSA [RFC7684].
sub-TLV of TE Link TLV (2) of OSPF TE LSA [RFC3630].
sub-TLV of the Router-Link TLV in the E-Router-LSA in OSPFv3
[RFC8362].
It is advertised as link attribute TLV.
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When the Generic Metric is sourced from below TLV in ISIS and OSPF
sub-TLV 16 (Application-Specific Link Attributes) of TLV
22/222/23/223/141 [RFC8919]
sub-sub-TLV of Application-Specific Link Attributes sub-TLV
[RFC8920].
It is advertised as a sub-TLV of Application Specific Link Attributes
TLV [I-D.ietf-idr-bgp-ls-app-specific-attr]
2.1. BGP-LS Generic Metric TLV
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 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| metric-type | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Value |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type : TBD (To be assigned by IANA)
Length: 8 octets
metric-type = A value from the IGP metric type registry
Value : metric value (0- 4,294,967,295)
Figure 1: BGP-LS Generic Metric TLV
3. BGP-LS FAD constraint sub-TLVs
The sub-TLVs described in this section are advertised as the sub-TLV
of the Flexible Algorithm Definition TLV [RFC9351].
These sub-TLVs are either sourced from ISIS, OSPF or OSPFv3 as
described in [I-D.ietf-lsr-flex-algo-bw-con]
3.1. Flexible Algorithm Exclude Minimum Bandwidth
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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 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Min Bandwidth |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
where:
Type: TBD
Length: 4 octets.
Min Bandwidth: link bandwidth is encoded in 32 bits in IEEE
floating point format. The units are bytes per second.
Figure 2: BGP-LS FAEMB sub-TLV
3.2. Flexible Algorithm Exclude Maximum Delay
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 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max Delay |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
where:
Type: TBD
Length: 3 octets
Max link delay: Maximum link delay in microseconds
Figure 3: BGP-LS FAEMD sub-TLV
3.3. Flexible Algorithm Reference Bandwidth
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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 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reference Bandwidth |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Granularity Bandwidth |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
where:
Type: TBD
Length: 14 octets.
Reference Bandwidth: Bandwidth encoded in 32 bits in
IEEE floating point format.
The units are in bytes per second.
Granularity Bandwidth: Bandwidth encoded in 32 bits in
IEEE floating point format.
The units are in bytes per second.
Flags:
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|G| | | |
+-+-+-+-+-+-+-+-+
G-flag: when set, interface group Mode MUST be used
to derive total link bandwidth.
Metric calculation: (Reference_bandwidth) /
(Total_link_bandwidth -
(Modulus of
(Total_link_bandwidth, Granularity_bw)))
Figure 4: BGP-LS FADRB sub-TLV
3.4. Flexible Algorithm Bandwidth Threshold
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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 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Bandwidth Threshold 1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Threshold Metric 1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Bandwidth Threshold 2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Threshold Metric 2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Bandwidth Threshold 3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
.....
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Threshold Metric n-1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Bandwidth Threshold n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Threshold Metric n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
where:
Type: TBD
Length: 2 + n*8 octets. Here n is equal to number of
Threshold Metrics specified.
n MUST be greater than or equal to 1.
Flags:
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|G| | | |
+-+-+-+-+-+-+-+-+
G-flag: when set, interface group Mode MUST be used to
derive total link bandwidth.
Staircase bandwidth threshold and associated metric values.
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Bandwidth Threshold 1: Minimum Link Bandwidth is
encoded in 32 bits in IEEE
floating point format.
The units are bytes per second.
Bandwidth Threshold 2: Maximum Link Bandwidth is encoded in
32 bits in IEEE floating point format.
The units are bytes per second.
Threshold Metric 1 : metric value range (1 - 4,294,967,296)
Figure 5: OSPF FADBT sub-TLV
4. BGP-LS IP Algorithm TLV
BGP-LS IP algorithm TLV is a node Attribute TLV and is encoded along
with the Node NLRI. The TLV may be sourced from ISIS and/or OSPF as
defined in section 5.1 and 5.2 of [I-D.ietf-lsr-ip-flexalgo] .
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 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Algorithm 1 | Algorithm... | Algorithm n | |
+- -+
| |
+ +
* Type: IP Algorithm TLV (Value TBD by IANA)
* Length: Variable
* Algorithm (1 octet): Value from 128 to 255.
Figure 6: BGP-LS IP Algorithm TLV
5. BGP-LS IP Algorithm Prefix Reachability TLV
The IP algorithm Prefix Reachability TLV is advertised as a Prefix
Attribute and may be associated with an IPv4 or an IPv6 Prefix. This
TLV MUST appear only once in a Prefix NLRI. If the IP algorithm
Prefix Reachability TLV is present, Prefix Metric TLV MUST NOT be
added. IP algorithm Prefix Reachability TLV is present, IGP Flags
TLV carries the flags for IP algorithm Prefix Reachability TLV.
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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 2
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Algorithm| Reserved | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Metric |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type (2 octets) : The value is TBD.
* Length (2 octet): 8
* Algorithm (1 octet): Associated Algorithm from 128 to 255.
* Reserved: (3 octets). SHOULD be set to 0 on transmission and MUST
be ignored on reception.
* Metric (4 octets): The algorithm specific metric value. The
metric value of 0XFFFFFFFF MUST be considered as unreachable.
* Flags (1 octet): None defined
Figure 7: BGP-LS IP Algorithm Prefix Reachability TLV
6. Backward Compatibility
7. Security Considerations
TBD
8. IANA Considerations
8.1. BGP-LS NLRI and Attribute TLVs
BGP-LS NLRI and Attribute TLV registry is updated to include newly
defined Node, link and prefix attriute TLVs.
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+-----------+---------------------+------------------------------+
| TLV Code | Description | Reference |
| Point | | (RFC/Section) |
+------------+---------------------+------------------------------+
| TBD1 | IP Algorithm TLV | draft-ietf-lsr-ip-flexalgo |
| | | Section 5.1/5.2 |
| TBD2 | IPv4 Algorithm |draft-ietf-lsr-ip-flexalgo |
| | Prefix Reachability | section 6.1 to 6.4 |
| | TLV | |
| TBD3 | Generic Metric TLV |draft-ietf-lsr-flex-algo-bw-con
| | | Section 2.1 and 2.2 |
| TBD4 |Flexible Algorithm |draft-ietf-lsr-flex-algo-bw-con
| |Exclude Minimum |Section 3.1.1 and 3.2.1 |
| |Bandwidth | |
| TBD5 |Flexible Algorithm |draft-ietf-lsr-flex-algo-bw-con
| |Exclude Maximum |Section 3.1.2 and 3.2.2 |
| |Delay | |
| TBD6 |Flexible Algorithm |draft-ietf-lsr-flex-algo-bw-con
| |Reference Bandwidth |Section 4.1.3.1 and 4.1.4.1 |
| TBD7 |Flexible Algorithm |draft-ietf-lsr-flex-algo-bw-con
| | Bandwidth Threshold |Section 4.1.3.2 and 4.1.4.2 |
+------------+---------------------+------------------------------+
Figure 8: IANA BGP-LS NLRI and Attribute TLVs
9. Acknowledgements
10. References
10.1. Normative References
[I-D.ietf-idr-bgp-ls-app-specific-attr]
Talaulikar, K., Psenak, P., and J. Tantsura, "Application-
Specific Link Attributes Advertisement Using the Border
Gateway Protocol - Link State (BGP-LS)", Work in Progress,
Internet-Draft, draft-ietf-idr-bgp-ls-app-specific-attr-
16, 7 July 2022, <https://datatracker.ietf.org/doc/html/
draft-ietf-idr-bgp-ls-app-specific-attr-16>.
[I-D.ietf-lsr-flex-algo-bw-con]
Hegde, S., Britto, W., Shetty, R., Decraene, B., Psenak,
P., and T. Li, "Flexible Algorithms: Bandwidth, Delay,
Metrics and Constraints", Work in Progress, Internet-
Draft, draft-ietf-lsr-flex-algo-bw-con-06, 10 March 2023,
<https://datatracker.ietf.org/doc/html/draft-ietf-lsr-
flex-algo-bw-con-06>.
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[I-D.ietf-lsr-ip-flexalgo]
Britto, W., Hegde, S., Kaneriya, P., Shetty, R., Bonica,
R., and P. Psenak, "IGP Flexible Algorithms (Flex-
Algorithm) In IP Networks", Work in Progress, Internet-
Draft, draft-ietf-lsr-ip-flexalgo-08, 19 December 2022,
<https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-
flexalgo-08>.
[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>.
[RFC3630] Katz, D., Kompella, K., and D. Yeung, "Traffic Engineering
(TE) Extensions to OSPF Version 2", RFC 3630,
DOI 10.17487/RFC3630, September 2003,
<https://www.rfc-editor.org/info/rfc3630>.
[RFC5305] Li, T. and H. Smit, "IS-IS Extensions for Traffic
Engineering", RFC 5305, DOI 10.17487/RFC5305, October
2008, <https://www.rfc-editor.org/info/rfc5305>.
[RFC7684] Psenak, P., Gredler, H., Shakir, R., Henderickx, W.,
Tantsura, J., and A. Lindem, "OSPFv2 Prefix/Link Attribute
Advertisement", RFC 7684, DOI 10.17487/RFC7684, November
2015, <https://www.rfc-editor.org/info/rfc7684>.
[RFC7752] Gredler, H., Ed., Medved, J., Previdi, S., Farrel, A., and
S. Ray, "North-Bound Distribution of Link-State and
Traffic Engineering (TE) Information Using BGP", RFC 7752,
DOI 10.17487/RFC7752, March 2016,
<https://www.rfc-editor.org/info/rfc7752>.
[RFC8362] Lindem, A., Roy, A., Goethals, D., Reddy Vallem, V., and
F. Baker, "OSPFv3 Link State Advertisement (LSA)
Extensibility", RFC 8362, DOI 10.17487/RFC8362, April
2018, <https://www.rfc-editor.org/info/rfc8362>.
[RFC8919] Ginsberg, L., Psenak, P., Previdi, S., Henderickx, W., and
J. Drake, "IS-IS Application-Specific Link Attributes",
RFC 8919, DOI 10.17487/RFC8919, October 2020,
<https://www.rfc-editor.org/info/rfc8919>.
[RFC8920] Psenak, P., Ed., Ginsberg, L., Henderickx, W., Tantsura,
J., and J. Drake, "OSPF Application-Specific Link
Attributes", RFC 8920, DOI 10.17487/RFC8920, October 2020,
<https://www.rfc-editor.org/info/rfc8920>.
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[RFC9350] Psenak, P., Ed., Hegde, S., Filsfils, C., Talaulikar, K.,
and A. Gulko, "IGP Flexible Algorithm", RFC 9350,
DOI 10.17487/RFC9350, February 2023,
<https://www.rfc-editor.org/info/rfc9350>.
[RFC9351] Talaulikar, K., Ed., Psenak, P., Zandi, S., and G. Dawra,
"Border Gateway Protocol - Link State (BGP-LS) Extensions
for Flexible Algorithm Advertisement", RFC 9351,
DOI 10.17487/RFC9351, February 2023,
<https://www.rfc-editor.org/info/rfc9351>.
10.2. Informative References
[RFC5120] Przygienda, T., Shen, N., and N. Sheth, "M-ISIS: Multi
Topology (MT) Routing in Intermediate System to
Intermediate Systems (IS-ISs)", RFC 5120,
DOI 10.17487/RFC5120, February 2008,
<https://www.rfc-editor.org/info/rfc5120>.
[RFC5311] McPherson, D., Ed., Ginsberg, L., Previdi, S., and M.
Shand, "Simplified Extension of Link State PDU (LSP) Space
for IS-IS", RFC 5311, DOI 10.17487/RFC5311, February 2009,
<https://www.rfc-editor.org/info/rfc5311>.
[RFC5316] Chen, M., Zhang, R., and X. Duan, "ISIS Extensions in
Support of Inter-Autonomous System (AS) MPLS and GMPLS
Traffic Engineering", RFC 5316, DOI 10.17487/RFC5316,
December 2008, <https://www.rfc-editor.org/info/rfc5316>.
[RFC7471] Giacalone, S., Ward, D., Drake, J., Atlas, A., and S.
Previdi, "OSPF Traffic Engineering (TE) Metric
Extensions", RFC 7471, DOI 10.17487/RFC7471, March 2015,
<https://www.rfc-editor.org/info/rfc7471>.
[RFC8570] Ginsberg, L., Ed., Previdi, S., Ed., Giacalone, S., Ward,
D., Drake, J., and Q. Wu, "IS-IS Traffic Engineering (TE)
Metric Extensions", RFC 8570, DOI 10.17487/RFC8570, March
2019, <https://www.rfc-editor.org/info/rfc8570>.
Authors' Addresses
Shraddha Hegde
Juniper Networks Inc.
Exora Business Park
Bangalore 560103
KA
India
Email: shraddha@juniper.net
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Peter Psenak
Cisco Systems
Email: ppsenak@cisco.com
Bruno Decraene
Orange
Email: bruno.decraene@orange.com
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