This concern is overcome by events; IP Parcels and Advanced Jumbos of all sizes 
now support UDP options.

From: Joe Touch <[email protected]>
Sent: Friday, September 27, 2024 8:48 AM
To: Templin (US), Fred L <[email protected]>
Cc: Fred L Templin <[email protected]>; Tim Chown 
<[email protected]>; Internet Area <[email protected]>; IPv6 List 
<[email protected]>; tsvwg IETF list <[email protected]>; Fred L Templin 
<[email protected]>
Subject: Re: [Int-area] Re: IP Parcels and Advanced Jumbos (AJs)

Content changes are not allowed in AUTH48, but We just concluded WG last call.


On Sep 27, 2024, at 8:43 AM, Templin (US), Fred L 
<[email protected]<mailto:[email protected]>> wrote:

> UDP options cannot currently be used for still larger sizes

Actually, there is an easy fix for this which can be added to the queue for 
AUTH48.

Fred

From: Templin (US), Fred L 
<[email protected]<mailto:[email protected]>>
Sent: Friday, September 27, 2024 8:19 AM
To: [email protected]<mailto:[email protected]>
Cc: Tim Chown <[email protected]<mailto:[email protected]>>; Internet 
Area <[email protected]<mailto:[email protected]>>; IPv6 List 
<[email protected]<mailto:[email protected]>>; tsvwg IETF list 
<[email protected]<mailto:[email protected]>>
Subject: [Int-area] Re: IP Parcels and Advanced Jumbos (AJs)

Hi Joe,

>That approach to UDP jumbo grams is incompatible with UDP options.

IP parcels and Advanced Jumbos per my drafts are compatible with UDP options 
for sizes
up to ~64KB. UDP options cannot currently be used for still larger sizes, but I 
suspect it
will be a long time before we have to worry about that.

Fred

From: [email protected]<mailto:[email protected]> 
<[email protected]<mailto:[email protected]>>
Sent: Friday, September 27, 2024 8:13 AM
To: Templin (US), Fred L 
<[email protected]<mailto:[email protected]>>
Cc: Brian E Carpenter 
<[email protected]<mailto:[email protected]>>; Tom Herbert 
<[email protected]<mailto:[email protected]>>; Tim Chown 
<[email protected]<mailto:[email protected]>>; Internet Area 
<[email protected]<mailto:[email protected]>>; IPv6 List 
<[email protected]<mailto:[email protected]>>; tsvwg IETF list 
<[email protected]<mailto:[email protected]>>
Subject: [EXTERNAL] Re: [Int-area] IP Parcels and Advanced Jumbos (AJs)

EXT email: be mindful of links/attachments.



On Sep 27, 2024, at 7:58 AM, Templin (US), Fred L 
<[email protected]<mailto:[email protected]>>
 wrote:

Indeed. But if sendmsg() and recvmsg() can and do generate RFC2675 packets, it 
means that any discussion of obsoleting RFC2675 should be
off the table.

No one that I know of has suggested obsoleting RFC2675 - my documents do not 
say "obsoletes" (nor even "updates”).

That approach to UDP jumbo grams is incompatible with UDP options.

And yes, there was a proposal to move that RFC to historic:



Jones, T., G. Fairhurst, "Change Status of RFC 2675 to Historic," 
draft-jones-6man-historic-rfc2675, May 2019.



We COULD have a new option with a longer length, but that’s not in our baseline 
draft.


Joe
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