[netmod] [Technical Errata Reported] RFC8519 (5762)

[RFC Errata System <[e-mail]>]

The following errata report has been submitted for RFC8519,
"YANG Data Model for Network Access Control Lists (ACLs)".

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid5762

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Type: Technical
Reported by: Qin WU <[e-mail]>

Section: 4.1

Original Text
-------------
leaf type {
type acl-type;
description
  "Type of ACL.  Indicates the primary intended
   type of match criteria (e.g., Ethernet, 
   IPv4, IPv6, mixed, etc.) used in the list
   instance.";
}

Corrected Text
--------------
leaf type {
type acl-type;
default "ipv4-acl-type";
description
  "Type of ACL.  Indicates the primary intended
   type of match criteria (e.g., Ethernet, 
   IPv4, IPv6, mixed, etc.) used in the list
   instance.";
}

Notes
-----
I am wondering why not  set default value for acl-type,e.g., set default value as "ipv4-acl-type" otherwise, how to determine which field under which choice will be matched upon and which action should be taken on them if the opetional parameter type under acl list is not set.

Also I want to better understand why acl type is removed from key indexes of access list and keep it as optional parameter under acl list. One case I am thinking in my mind is we add a mixed Ethernet, IPv4, and IPv6 ACL entry when we already have Ethernet ACL entry,IPv4 ACL entry , we don't need to remove existing ethernet entry and existing IPv4 entry in the list ("aces") and create a new entry with mixed ethernet, IPv4, IPv6 ACL, instead, we just add a new identity called mixed-eth-ipv4-ipv6-acl-type and add a new IPv6 entry.

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RFC8519 (draft-ietf-netmod-acl-model-21)
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Title               : YANG Data Model for Network Access Control Lists (ACLs)
Publication Date    : March 2019
Author(s)           : M. Jethanandani, S. Agarwal, L. Huang, D. Blair
Category            : PROPOSED STANDARD
Source              : Network Modeling
Area                : Operations and Management
Stream              : IETF
Verifying Party     : IESG