Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Gengxuesong (Geng Xuesong)]

Hi Chongfeng,

Thanks for updating the document and the new version looks good to me.

Best
Xuesong

From: Chongfeng Xie [mailto:chongfeng@foxmail.com]
Sent: Tuesday, January 23, 2024 11:33 AM
To: Gengxuesong (Geng Xuesong) ; Acee Lindem 
; lsr 
Subject: Re: RE: [Lsr] Working Group Last Call for "Applicability of IS-IS 
Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" 
- draft-ietf-lsr-isis-sr-vtn-mt-06


Hi Xuesong,

Thanks for your support and review comments. We are working on a new revision 
which will take your comments into consideration.

As for your suggestion to add reference to the more scalable solution, 
according to the comments from Acee, we would not mention the specific solution 
in this draft, but we have referred to the NRP scalability document for more 
information on the scalability discussion.  Hope that would be OK to you.

Best regards,
Chongfeng

From: Gengxuesong (Geng Xuesong)<mailto:gengxues...@huawei.com>
Date: 2024-01-11 18:37
To: Acee Lindem<mailto:acee.i...@gmail.com>; Lsr<mailto:lsr@ietf.org>
Subject: RE: [Lsr] Working Group Last Call for "Applicability of IS-IS 
Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" 
- draft-ietf-lsr-isis-sr-vtn-mt-06
Hi WG,

I support the publication of this document. I think this is a reasonable method 
of network slicing implementation which could reuse the existing mechanism.
Some editing comments for authors' reference.

Best
Xuesong

--

1.  Introduction
...
This document describes a
   simplified mechanism to build SR based NRPs in those scenarios.  The
   resource-aware segments can be used with this approach to provide
   resource guaranteed SR based NRPs, while the normal SR segments may
   also be used to provide SR based NRPs with shared network resources
   in the forwarding plane.

   The proposed approach is to use IS-IS Multi-Topology [RFC5120] with
   segment routing [RFC8667] to define the independent network topology
   of each NRP.  The network resources and other TE attributes of an NRP
   can be advertised using IS-IS MT with the Traffic Engineering (TE)
   extensions defined in [RFC5305] and [RFC8570].

[Xuesong] I recommend to swap the position of these two sentences. It will be 
easier for readers' understanding: show what is the proposal firstly and then 
describe this could be used with resource-aware segments to provide resource 
guaranteed SR based NRPs

2.  Advertisement of Topology Attribute for SR based NRP

[Xuesong] It will be helpful if there is a summary about what Topology 
Attribute for SR based NRP is requested before introducing what could be reused 
in different existing RFCs.

3.  Advertisement of Resource Attribute for SR based NRP

   In order to perform constraint based path computation for each NRP on
   the network controller or on the ingress nodes, the network resource
   attributes and other attributes associated with each NRP need to be
   advertised.

[Xuesong] It could be considered to add some explanation for whether this is 
just for this proposal or also could be used to other resource guaranteed SR 
based NRPs


5.  Scalability Considerations
  The
   mechanism described in this document is considered useful for network
   scenarios in which the required number of NRP is small, as no control
   protocol extension is required.  For network scenarios where the
   number of required NRP is large, more scalable solution would be
   needed, which may require further protocol extensions and
   enhancements.

[Xuesong] This is helpful to add some reference for example of more scalable 
solutions.


> -Original Message-
> From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Acee Lindem
> Sent: Tuesday, January 9, 2024 6:50 AM
> To: Lsr mailto:lsr@ietf.org>>
> Subject: [Lsr] Working Group Last Call for "Applicability of IS-IS 
> Multi-Topology
> (MT) for Segment Routing based Network Resource Partition (NRP)" -
> draft-ietf-lsr-isis-sr-vtn-mt-06
>
> This begins a two week LSR Working Group last call for the “Applicability of 
> IS-IS
> Multi-Topology (MT) for Segment Routing based Network Resource Partition
> (NRP)”. Please express your support or objection prior to Tuesday, January 
> 23rd,
> 2024.
>
> Thanks,
> Acee
> ___
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Acee Lindem]

Speaking as WG Co-Chair and Document Shepherd: 

With the draft-ietf-lsr-isis-sr-vtn-mt-07 version, I believe we have reached 
consensus on publishing this informational document as a lower-scale mechanism 
for deployment of NRPs using IS-IS MT. 

However, before I request publication, I will be waiting for the following 
documents to progress in the SPRING WG. Both of these are normative references 
and I believe they are required components of the documented solution. 

[I-D.ietf-spring-resource-aware-segments]  
   
https://datatracker.ietf.org/doc/html/draft-ietf-spring-resource-aware-segments-08
[I-D.ietf-spring-sr-for-enhanced-vpn]
   
https://datatracker.ietf.org/doc/html/draft-ietf-spring-sr-for-enhanced-vpn-06  

From the standpoint of the LSR WG, the chairs view this work as completed and 
will be shifting focus to other LSR documents. 

Thanks,
Acee
  
> On Jan 8, 2024, at 5:50 PM, Acee Lindem  wrote:
> 
> This begins a two week LSR Working Group last call for the “Applicability of 
> IS-IS Multi-Topology (MT) for Segment Routing based Network Resource 
> Partition (NRP)”. Please express your support or objection prior to Tuesday, 
> January 23rd, 2024. 
> 
> Thanks,
> Acee


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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Chongfeng Xie]

Hi Xuesong,

Thanks for your support and review comments. We are working on a new revision 
which will take your comments into consideration.

As for your suggestion to add reference to the more scalable solution, 
according to the comments from Acee, we would not mention the specific solution 
in this draft, but we have referred to the NRP scalability document for more 
information on the scalability discussion.  Hope that would be OK to you.

Best regards,
Chongfeng
 
From: Gengxuesong (Geng Xuesong)
Date: 2024-01-11 18:37
To: Acee Lindem; Lsr
Subject: RE: [Lsr] Working Group Last Call for "Applicability of IS-IS 
Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" 
- draft-ietf-lsr-isis-sr-vtn-mt-06
Hi WG,
 
I support the publication of this document. I think this is a reasonable method 
of network slicing implementation which could reuse the existing mechanism.
Some editing comments for authors' reference.
 
Best
Xuesong
 
--
 
1.  Introduction
...
This document describes a
   simplified mechanism to build SR based NRPs in those scenarios.  The
   resource-aware segments can be used with this approach to provide
   resource guaranteed SR based NRPs, while the normal SR segments may
   also be used to provide SR based NRPs with shared network resources
   in the forwarding plane.
 
   The proposed approach is to use IS-IS Multi-Topology [RFC5120] with
   segment routing [RFC8667] to define the independent network topology
   of each NRP.  The network resources and other TE attributes of an NRP
   can be advertised using IS-IS MT with the Traffic Engineering (TE)
   extensions defined in [RFC5305] and [RFC8570].
 
[Xuesong] I recommend to swap the position of these two sentences. It will be 
easier for readers' understanding: show what is the proposal firstly and then 
describe this could be used with resource-aware segments to provide resource 
guaranteed SR based NRPs
 
2.  Advertisement of Topology Attribute for SR based NRP
 
[Xuesong] It will be helpful if there is a summary about what Topology 
Attribute for SR based NRP is requested before introducing what could be reused 
in different existing RFCs.
 
3.  Advertisement of Resource Attribute for SR based NRP
 
   In order to perform constraint based path computation for each NRP on
   the network controller or on the ingress nodes, the network resource
   attributes and other attributes associated with each NRP need to be
   advertised.
 
[Xuesong] It could be considered to add some explanation for whether this is 
just for this proposal or also could be used to other resource guaranteed SR 
based NRPs
 
 
5.  Scalability Considerations
  The
   mechanism described in this document is considered useful for network
   scenarios in which the required number of NRP is small, as no control
   protocol extension is required.  For network scenarios where the
   number of required NRP is large, more scalable solution would be
   needed, which may require further protocol extensions and
   enhancements.
 
[Xuesong] This is helpful to add some reference for example of more scalable 
solutions.
 
 
> -Original Message-
> From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Acee Lindem
> Sent: Tuesday, January 9, 2024 6:50 AM
> To: Lsr 
> Subject: [Lsr] Working Group Last Call for "Applicability of IS-IS 
> Multi-Topology
> (MT) for Segment Routing based Network Resource Partition (NRP)" -
> draft-ietf-lsr-isis-sr-vtn-mt-06
>
> This begins a two week LSR Working Group last call for the “Applicability of 
> IS-IS
> Multi-Topology (MT) for Segment Routing based Network Resource Partition
> (NRP)”. Please express your support or objection prior to Tuesday, January 
> 23rd,
> 2024.
>
> Thanks,
> Acee
> ___
> Lsr mailing list
> Lsr@ietf.org
> https://www.ietf.org/mailman/listinfo/lsr
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Mach Chen]

Hi Acee,

I have read the latest version of the document. It's just an informational 
document and describes a way for using IS-IS MT implement SR based NRP, it 
gives an informative reference to the operators and implementors who have 
interests. I think it's a useful document and ready for publication.

Best regards,
Mach

> -Original Message-
> From: Lsr  On Behalf Of Acee Lindem
> Sent: Tuesday, January 9, 2024 6:50 AM
> To: Lsr 
> Subject: [Lsr] Working Group Last Call for "Applicability of IS-IS 
> Multi-Topology
> (MT) for Segment Routing based Network Resource Partition (NRP)" -
> draft-ietf-lsr-isis-sr-vtn-mt-06
> 
> This begins a two week LSR Working Group last call for the “Applicability of 
> IS-IS
> Multi-Topology (MT) for Segment Routing based Network Resource Partition
> (NRP)”. Please express your support or objection prior to Tuesday, January 
> 23rd,
> 2024.
> 
> Thanks,
> Acee
> ___
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> https://www.ietf.org/mailman/listinfo/lsr
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Giuseppe Fioccola]

Hi Acee, All,
I have read this document and support its progress.

Regards,

Giuseppe

-Original Message-
From: Lsr  On Behalf Of Acee Lindem
Sent: Monday, January 8, 2024 11:50 PM
To: Lsr 
Subject: [Lsr] Working Group Last Call for "Applicability of IS-IS 
Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" 
- draft-ietf-lsr-isis-sr-vtn-mt-06

This begins a two week LSR Working Group last call for the “Applicability of 
IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition 
(NRP)”. Please express your support or objection prior to Tuesday, January 
23rd, 2024. 

Thanks,
Acee
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Linjian Song]

Hi all 
This draft is well written. I support it as an informational draft. 
Davey

> 2024年1月9日 06:50，Acee Lindem  写道：
> 
> This begins a two week LSR Working Group last call for the “Applicability of 
> IS-IS Multi-Topology (MT) for Segment Routing based Network Resource 
> Partition (NRP)”. Please express your support or objection prior to Tuesday, 
> January 23rd, 2024. 
> 
> Thanks,
> Acee

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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Donald Eastlake]

I have read this draft and support its publication as an Informational RFC.

Thanks,
Donald
===
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 2386 Panoramic Circle, Apopka, FL 32703 USA
 d3e...@gmail.com


On Mon, Jan 8, 2024 at 5:50 PM Acee Lindem  wrote:

> This begins a two week LSR Working Group last call for the “Applicability
> of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource
> Partition (NRP)”. Please express your support or objection prior to
> Tuesday, January 23rd, 2024.
>
> Thanks,
> Acee
> ___
> Lsr mailing list
> Lsr@ietf.org
> https://www.ietf.org/mailman/listinfo/lsr
>
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Chenhao.M]

Hi all，

As a co-author, I think this document is mature enough and support its WGLC.

Best regards，
Chenhao Ma



On Jan 9, 2024, at 06:50, Acee Lindem  wrote:

This begins a two week LSR Working Group last call for the “Applicability of 
IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition 
(NRP)”. Please express your support or objection prior to Tuesday, January 
23rd, 2024. 

Thanks,
Acee
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[linchangwang]

Hi Acee,,

I have reviewed the document. It leverages the IS-IS Multi-Topology (MT) to 
build SR-based VTNs, which is a good idea for network scenarios.
I also believe it is practical for NRP deployment. The current document is 
mature enough, so I support its WGLC.

Thanks,
Changwang


-Original Message-
From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Acee Lindem
Sent: Tuesday, January 09, 2024 6:50 AM
To: Lsr
Subject: [Lsr] Working Group Last Call for "Applicability of IS-IS 
Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" 
- draft-ietf-lsr-isis-sr-vtn-mt-06

This begins a two week LSR Working Group last call for the “Applicability of 
IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition 
(NRP)”. Please express your support or objection prior to Tuesday, January 
23rd, 2024.

Thanks,
Acee
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[胖胖]

Hi lsr WG，

I think the draft is mature enough and well-written after more than 3 years 
work, and I support moving it forward.

Best regards
Guozhen


> 2024年1月9日 06:50，Acee Lindem  写道：
> 
> This begins a two week LSR Working Group last call for the “Applicability of 
> IS-IS Multi-Topology (MT) for Segment Routing based Network Resource 
> Partition (NRP)”. Please express your support or objection prior to Tuesday, 
> January 23rd, 2024. 
> 
> Thanks,
> Acee
> ___
> Lsr mailing list
> Lsr@ietf.org
> https://www.ietf.org/mailman/listinfo/lsr

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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Huaimo Chen]

Hi Everyone,

I read through the document and support moving it forward.

Best Regards,
Huaimo
-Original Message-
From: Lsr  On Behalf Of Acee Lindem
Sent: Monday, January 8, 2024 5:50 PM
To: Lsr 
Subject: [Lsr] Working Group Last Call for "Applicability of IS-IS 
Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" 
- draft-ietf-lsr-isis-sr-vtn-mt-06

This begins a two week LSR Working Group last call for the "Applicability of 
IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition 
(NRP)". Please express your support or objection prior to Tuesday, January 
23rd, 2024.

Thanks,
Acee
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Gengxuesong (Geng Xuesong)]

Hi WG,

I support the publication of this document. I think this is a reasonable method 
of network slicing implementation which could reuse the existing mechanism.
Some editing comments for authors' reference.

Best
Xuesong

--

1.  Introduction
...
This document describes a
   simplified mechanism to build SR based NRPs in those scenarios.  The
   resource-aware segments can be used with this approach to provide
   resource guaranteed SR based NRPs, while the normal SR segments may
   also be used to provide SR based NRPs with shared network resources
   in the forwarding plane.

   The proposed approach is to use IS-IS Multi-Topology [RFC5120] with
   segment routing [RFC8667] to define the independent network topology
   of each NRP.  The network resources and other TE attributes of an NRP
   can be advertised using IS-IS MT with the Traffic Engineering (TE)
   extensions defined in [RFC5305] and [RFC8570].

[Xuesong] I recommend to swap the position of these two sentences. It will be 
easier for readers' understanding: show what is the proposal firstly and then 
describe this could be used with resource-aware segments to provide resource 
guaranteed SR based NRPs

2.  Advertisement of Topology Attribute for SR based NRP

[Xuesong] It will be helpful if there is a summary about what Topology 
Attribute for SR based NRP is requested before introducing what could be reused 
in different existing RFCs.

3.  Advertisement of Resource Attribute for SR based NRP

   In order to perform constraint based path computation for each NRP on
   the network controller or on the ingress nodes, the network resource
   attributes and other attributes associated with each NRP need to be
   advertised.

[Xuesong] It could be considered to add some explanation for whether this is 
just for this proposal or also could be used to other resource guaranteed SR 
based NRPs


5.  Scalability Considerations
  The
   mechanism described in this document is considered useful for network
   scenarios in which the required number of NRP is small, as no control
   protocol extension is required.  For network scenarios where the
   number of required NRP is large, more scalable solution would be
   needed, which may require further protocol extensions and
   enhancements.

[Xuesong] This is helpful to add some reference for example of more scalable 
solutions.


> -Original Message-
> From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Acee Lindem
> Sent: Tuesday, January 9, 2024 6:50 AM
> To: Lsr 
> Subject: [Lsr] Working Group Last Call for "Applicability of IS-IS 
> Multi-Topology
> (MT) for Segment Routing based Network Resource Partition (NRP)" -
> draft-ietf-lsr-isis-sr-vtn-mt-06
> 
> This begins a two week LSR Working Group last call for the “Applicability of 
> IS-IS
> Multi-Topology (MT) for Segment Routing based Network Resource Partition
> (NRP)”. Please express your support or objection prior to Tuesday, January 
> 23rd,
> 2024.
> 
> Thanks,
> Acee
> ___
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Huzhibo]

By it nature MT is a good candiate for the control plane of NRP, and it is 
beneficial to reuse existing technology when applicable. The document has 
limited its scope to providing a small number of NRPs, which can still be 
useful for some networks. 

I support the publication of this document.

Thanks
Zhibo
-Original Message-
From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Acee Lindem
Sent: Tuesday, January 9, 2024 6:50 AM
To: Lsr 
Subject: [Lsr] Working Group Last Call for "Applicability of IS-IS 
Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" 
- draft-ietf-lsr-isis-sr-vtn-mt-06

This begins a two week LSR Working Group last call for the “Applicability of 
IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition 
(NRP)”. Please express your support or objection prior to Tuesday, January 
23rd, 2024. 

Thanks,
Acee
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Gyan Mishra]

I support publication.

IETF Network slicing can use any IETF technology such as ISIS MT  to build
the network slice NRP.

https://datatracker.ietf.org/doc/html/draft-ietf-teas-ietf-network-slices-25

This document describes network slicing in the context of networks built
from IETF technologies. It defines the term "IETF Network Slice" to
describe this type of network slice, and establishes the general principles
of network slicing in the IETF context.¶



Applicability of network slicing to SR-MPLS or SRv6 forwarding plane using
IETF technologies, encoding NRP-ID using  ISIS MT per MTID instance NRP
Network slice to be  instantiated.

Thanks



*Gyan Mishra*

*Network Solutions A**rchitect *

*Email gyan.s.mis...@verizon.com *



*M 301 502-1347*



On Mon, Jan 8, 2024 at 5:50 PM Acee Lindem  wrote:

> This begins a two week LSR Working Group last call for the “Applicability
> of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource
> Partition (NRP)”. Please express your support or objection prior to
> Tuesday, January 23rd, 2024.
>
> Thanks,
> Acee
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Re: [Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Wei Wang]

Hi all,


  I support the last call of this document.
  This document proposes a solution to build SR based NRPs by using 
IS-IS MT, which maximizes the reuse of existing mechanisms. Since the idea is 
good and the technical contents of this document is basically stable, I think 
it can go further.




Best Regards,
Wei



--Original--
From:   
 "Acee Lindem"  
  
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[Lsr] Working Group Last Call for "Applicability of IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition (NRP)" - draft-ietf-lsr-isis-sr-vtn-mt-06

[Acee Lindem]

This begins a two week LSR Working Group last call for the “Applicability of 
IS-IS Multi-Topology (MT) for Segment Routing based Network Resource Partition 
(NRP)”. Please express your support or objection prior to Tuesday, January 
23rd, 2024. 

Thanks,
Acee
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