Re: [Tsv-art] [Last-Call] Tsvart last call review of draft-ietf-idr-tunnel-encaps-19

Susan Hares <> Mon, 09 November 2020 21:26 UTC

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From: "Susan Hares" <>
To: "'Joseph Touch'" <>, "'Brian Trammell'" <>
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Date: Mon, 9 Nov 2020 16:26:50 -0500
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Subject: Re: [Tsv-art] [Last-Call] Tsvart last call review of draft-ietf-idr-tunnel-encaps-19
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Joe and Brian: 


As the replacement shepherd for draft-ietf-idr-tunnel-encaps-19.txt,  I am looking for the INT area statement on tunnels and MTU in tunnels. 


Your intarea draft seems to have expired without any replacement. 


Where is the latest set of comments on tunnels and MTU issue from INT area? 




From: Joseph Touch [] 
Sent: Thursday, October 15, 2020 9:12 PM
To: Brian Trammell
Cc: tsv-art; Last Call;;
Subject: Re: [Last-Call] Tsvart last call review of draft-ietf-idr-tunnel-encaps-19



On Sep 28, 2020, at 11:32 PM, Brian Trammell via Datatracker <> wrote:


First and foremost, I was surprised to find no reference to tunnel or MTU 
anywhere in the document, especially given the guidance in section 6 to
stack tunnels. MTU issues are operationally difficulty in single-tunnel
environments and become more likely to cause problems in multiple-tunnel




This is discussed in detail, with some much more specific terminology, in draft-ietf-intarea-tunnels


In particular, *path MTU* is different from the received MTU, etc. It’s important to get this correct (note the many examples of current standards that do not).