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

From: Joseph Touch <[email-masked]>
Date: Thu, 15 Oct 2020 18:12:04 -0700

> On Sep 28, 2020, at 11:32 PM, Brian Trammell via Datatracker <[email-masked]> 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
> environments. 

+1

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).

Joe