Hi John/Acee/Peter,

I was not in a position to judge for myself on this matter and hence thought 
prudent to first raise this as an erratum.

I have no issues with pursuing this update via a bis.

Thanks,
Ketan

-----Original Message-----
From: Peter Psenak <ppse...@cisco.com> 
Sent: 12 May 2021 12:59
To: John Scudder <j...@juniper.net>; Ketan Talaulikar (ketant) 
<ket...@cisco.com>; lsr@ietf.org
Cc: s...@nuovasystems.com; aos...@redback.com; Alvaro Retana 
<aretana.i...@gmail.com>; Martin Vigoureux <martin.vigour...@nokia.com>; 
a...@cisco.com; Acee Lindem (acee) <a...@cisco.com>
Subject: Re: [Technical Errata Reported] RFC5185 (6506)

Hi Jonh,

On 10/05/2021 20:34, John Scudder wrote:
> Hi All,
> 
> I took a look at the list thread Ketan references at the bottom of the 
> proposed erratum. It seems pretty clear this would be a technical change vs. 
> the WG consensus when the document was progressed, and should be rejected 
> (see https://www.ietf.org/about/groups/iesg/statements/processing-rfc-errata/ 
> #7). The appropriate way to pursue this looks to be an update or bis.
> 
> If there’s any disagreement, please let me know (and let me know why you 
> think it’s appropriate as an erratum).

no disagreement on my side.

thanks,
Peter


> 
> Thanks,
> 
> —John
> 
>> On Apr 2, 2021, at 8:29 AM, RFC Errata System <rfc-edi...@rfc-editor.org> 
>> wrote:
>>
>> [External Email. Be cautious of content]
>>
>>
>> The following errata report has been submitted for RFC5185, "OSPF 
>> Multi-Area Adjacency".
>>
>> --------------------------------------
>> You may review the report below and at:
>> https://urldefense.com/v3/__https://www.rfc-editor.org/errata/eid6506
>> __;!!NEt6yMaO-gk!WPFiufTtTdnWpOVBJkxDMATvZslLDxV_ss4NJ_eazUR-7R1mCBVt
>> Z5hadu8NhQ$
>>
>> --------------------------------------
>> Type: Technical
>> Reported by: Ketan Talaulikar <ket...@cisco.com>
>>
>> Section: 2.7
>>
>> Original Text
>> -------------
>>    Multi-area adjacencies are announced as point-to-point links.  Once
>>    the router's multi-area adjacency reaches the FULL state, it will be
>>    added as a link type 1 to the Router Link State Advertisement (LSA)
>>    with:
>>
>>       Link ID = Remote's Router ID
>>
>>       Link Data = Neighbor's IP Address or IfIndex (if the underlying
>>       interface is unnumbered).
>>
>>    Unlike numbered point-to-point links, no type 3 link is advertised
>>    for multi-area adjacencies.
>>
>>
>> Corrected Text
>> --------------
>>    Multi-area adjacencies are announced as point-to-point links.  Once
>>    the router's multi-area adjacency reaches the FULL state, it will be
>>    added as a link type 1 to the Router Link State Advertisement (LSA)
>>    with:
>>
>>       Link ID = Remote's Router ID
>>
>>       Link Data = Router interface's IP Address or IfIndex (if the underlying
>>       interface is unnumbered).
>>
>>    Unlike numbered point-to-point links, no type 3 link is advertised
>>    for multi-area adjacencies.
>>
>>
>> Notes
>> -----
>> The encoding of Link Data as specified in RFC5185 is not consistent with the 
>> base OSPF specification in RFC2328. This has resulted in different behaviors 
>> in deployed implementations where some follow RFC2328 (i.e. the corrected 
>> text) while others follow the Original text of RFC5185 leading to interop 
>> issues.
>>
>> More importantly, for implementations of RFC5185, it is not possible to 
>> determine the Neighbor's interface IfIndex unless some additional mechanisms 
>> (that have not been specified or referenced by RFC5185) are implemented - 
>> viz. RFC8510.
>>
>> This topic has been discussed in the LSR WG recently and this errata 
>> is being raised to track this issue : 
>> https://urldefense.com/v3/__https://mailarchive.ietf.org/arch/msg/lsr
>> /iL85WkrqhI17wUrxd-WozMQvKtE/__;!!NEt6yMaO-gk!WPFiufTtTdnWpOVBJkxDMAT
>> vZslLDxV_ss4NJ_eazUR-7R1mCBVtZ5hYBp-ZDA$
>>
>> Instructions:
>> -------------
>> This erratum is currently posted as "Reported". If necessary, please 
>> use "Reply All" to discuss whether it should be verified or rejected. 
>> When a decision is reached, the verifying party can log in to change 
>> the status and edit the report, if necessary.
>>
>> --------------------------------------
>> RFC5185 (draft-ietf-ospf-multi-area-adj-09)
>> --------------------------------------
>> Title               : OSPF Multi-Area Adjacency
>> Publication Date    : May 2008
>> Author(s)           : S. Mirtorabi, P. Psenak, A. Lindem, Ed., A. Oswal
>> Category            : PROPOSED STANDARD
>> Source              : Open Shortest Path First IGP
>> Area                : Routing
>> Stream              : IETF
>> Verifying Party     : IESG
> 
> 
> 

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