Re: [nvo3] Opsdir last call review of draft-ietf-nvo3-evpn-applicability-04
"Rabadan, Jorge (Nokia - US/Sunnyvale)" <jorge.rabadan@nokia.com> Thu, 01 September 2022 14:11 UTC
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From: "Rabadan, Jorge (Nokia - US/Sunnyvale)" <jorge.rabadan@nokia.com>
To: Scott Bradner <sob@sobco.com>, "ops-dir@ietf.org" <ops-dir@ietf.org>
CC: "draft-ietf-nvo3-evpn-applicability.all@ietf.org" <draft-ietf-nvo3-evpn-applicability.all@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "nvo3@ietf.org" <nvo3@ietf.org>
Thread-Topic: Opsdir last call review of draft-ietf-nvo3-evpn-applicability-04
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Date: Thu, 01 Sep 2022 14:10:31 +0000
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Subject: Re: [nvo3] Opsdir last call review of draft-ietf-nvo3-evpn-applicability-04
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Hi Scott, Thanks for your review. Please see below the resolution of your comments in-line with [jorge]. We incorporated the changes in version 05. Thx Jorge From: Scott Bradner via Datatracker <noreply@ietf.org> Date: Saturday, July 9, 2022 at 8:51 PM To: ops-dir@ietf.org <ops-dir@ietf.org> Cc: draft-ietf-nvo3-evpn-applicability.all@ietf.org <draft-ietf-nvo3-evpn-applicability.all@ietf.org>, last-call@ietf.org <last-call@ietf.org>, nvo3@ietf.org <nvo3@ietf.org> Subject: Opsdir last call review of draft-ietf-nvo3-evpn-applicability-04 Reviewer: Scott Bradner Review result: Has Nits Applicability of EVPN to NVO3 Networks <draft-ietf-nvo3-evpn-applicability> The ID is an applicability statement describing how to use Ethernet Virtual Private Network (EVPN) technology in NVO3 networks. Note that while the term NVO3 is widely used in the ID it is never cleanly defined – the closest definition is in section 2 but that actually defines “NVO3 or Overlay tunnels” as “Network Virtualization Over Layer-3 tunnels” but the introduction talks abut “NVO3 networks” not “NVO3 tunnels” – the definitions need to be cleaned up (and as Reese Enghardt points out, should be expanded on first use) [jorge] NVO3 is defined in RFC7365, we felt it was not needed to repeat it here. We added this in the terminology section: >This document uses the terminology of RFC7365 in addition to the terms that follow. Introduction: The introduction says “In NVO3 networks, Network Virtualization Edge (NVE) devices sit at the edge of the underlay network and provide Layer-2 and Layer-3 connectivity among Tenant Systems (TSes) of the same tenant. The NVEs need to build and maintain mapping tables so that they can deliver encapsulated packets to their intended destination NVE(s).” The last part confuses me – is the delivery to Network Virtualization Edges or to Network Virtualization Edge devices? -If it is to “edges” I do not know what that means. Looking at the rest of the text maybe the definition should read “Network Virtualization Edge devices (NVEs)” or be referred to as “NVE devices”. Maybe the problem is that to me An edge is not a “thing” – instead it is geography – (e.g., the edge of the road) [jorge] that’s fair. I included “device” in the definition of NVE. Hopefully now reads better. Section 2: Under ARP & ND – I’d expand slightly “Address Resolution Protocol (IPv4) and Neighbor Discovery protocol (IPv6). – might save someone a few minutes trying to find ND in IPv4 documentation [jorge] done. The rest of my comments are stylistic based on personal preference and are not suggestions to do a lot of work to change things – I find that using acronyms for common terms makes a document harder to read – for example using BD instead of broadcast domain – e.g. “EVPN VLAN-based service model: one of the three service models defined in [RFC7432]. It is characterized as a BD that uses a single VLAN per physical access port to attach tenant traffic to the BD. In this service model, there is only one BD per EVI.” Would be easier to read if each of the “BD” where just replaced with “broadcast domain” [jorge] ok, we tried to expand a few acronyms like this one. This ID seems to go out of its way to maximize the number of acronyms where, in my opinion, The document would be a lot easier to read if the actual terms were used instead – of course, Using an acronym for a protocol that is generally known by that acronym is quite reasonable Such as ND for neighbor discovery but I do not see that using “ES” instead of “Ethernet Segment” is a net plus for readability and clarity. [jorge] noted and changed. Along the same lines – using the number of the row in Table 1 instead of the description is not an advantage – e.g., using “RT-5 routes” instead of “IP Prefix routes” may save a few bytes but is no where as easy to understand. [jorge] noted and changed. Overall - the set of figures and the detailed explanation of each of them provides a great deal Of information on how to use Ethernet Virtual Private Network (EVPN) technology in NVO3 Networks but I find the descriptions hard to follow for someone not deeply involved in the Technology due to the density of acronyms per square inch of text. [jorge] hope it reads better now. Thanks again!
- [nvo3] Opsdir last call review of draft-ietf-nvo3… Scott Bradner via Datatracker
- Re: [nvo3] Opsdir last call review of draft-ietf-… Rabadan, Jorge (Nokia - US/Sunnyvale)