Hi,

I have been selected as the Operational Directorate (opsdir) reviewer for this Internet-Draft. 

The Operational Directorate reviews all operational and management-related Internet-Drafts to ensure alignment with operational best practices and that adequate operational considerations are covered.

A complete set of _"Guidelines for Considering Operations and Management in IETF Specifications"_ can be found at https://datatracker.ietf.org/doc/draft-opsarea-rfc5706bis/.

While these comments are primarily for the Operations and Management Area Directors (Ops ADs), the authors should consider them alongside other feedback received.


- Document: draft-ietf-idr-nhc-00

- Reviewer: Giuseppe Fioccola

- Review Date: 2026-02-16

- Intended Status: Standards Track 

 
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## Summary 

- Has Nits: This document is on the right track but has nits that should be considered.


## General Operational Comments Alignment with RFC 5706bis 


> This document defines a BGP transitive attribute called Next Hop Dependent Characteristics Attribute (NHC). When a route is propagated beyond the immediate peer, NHC allows to advertise further certain characteristics about forwarding plane features.

> The Operational Considerations section is missing and could be included. However, it is noted that there are already considerations regarding NHC deployment and operation (sections 2.2, 2.3, 2.4, 2.5) and regarding BGPID TLV operation (sections 3.2, 3.3, 3.4).

> Section 2.5 is titled "Network Operation Considerations" but I think that the title does not fully match the content. I would change it or extend the section to cover more deployment and operational aspects, as suggested in the next bullet.

> An Operational Considerations section may be included before the IANA Considerations section. The new section could put together or just refer to the relevant sections in order to cover deployment and operational aspects, for example sections 2.2, 2.3 and 2.4 provide deployment information, like the NHC propagation and regeneration that allow to introduce it into a network incrementally.


## Major Issues 

> No major issues found.

 
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## Minor Issues 

> From an OPSDIR point of view, there are several deployment considerations in the text. However, I would suggest to revise Section 2.5 or add a dedicated Operational Considerations section.

 
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## Nits 

> I suggest to change the title of Section 2.5 from "Network Operation Considerations" to "Anycast Next Hops".

> For the IANA Considerations section, I think that this document should only request the values defined in it. Therefore, Table 2 should not include values defined in other drafts.

> In the Security Considerations, it could also be mentioned the application to limited domains (RFC 8799).


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