Subject: [Int-area] draft-van-beijnum-multi-mtu-05.txt

From: Iljitsch van Beijnum <[email-masked]>
Date: Mon, 21 Mar 2016 22:46:52 +0100

(Please note: crossposted to 6man and intarea, please prune as desired.)

I've been working on a specification that allows for hosts on the same subnet to be configured with different jumboframe MTUs and then use the largest packet size supported by the sender and the receiver as well as the switches in the middle.

This has been discussed in intarea in the past, but I'm also sending the announcement of the new version of the draft to 6man because there's a new ND option and a change to the RA MTU option.

Feedback is highly appreciated.

Iljitsch

> Begin forwarded message:
> 
> From: [email-masked]
> Date: 21 March 2016 at 22:33:22 +0100
> To: <[email-masked]>
> Subject: I-D Action: draft-van-beijnum-multi-mtu-05.txt
> Reply-To: [email-masked]
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> 
> 
>        Title           : Extensions for Multi-MTU Subnets
>        Author          : Iljitsch van Beijnum
> 	Filename        : draft-van-beijnum-multi-mtu-05.txt
> 	Pages           : 24
> 	Date            : 2016-03-21
> 
> Abstract:
>   In the early days of the internet, many different link types with
>   many different maximum packet sizes were in use.  For point-to-point
>   or point-to-multipoint links, there are still some other link types
>   (PPP, ATM, Packet over SONET), but multipoint subnets are now almost
>   exclusively implemented as Ethernets.  Even though the relevant
>   standards mandate a 1500 byte maximum packet size for Ethernet, more
>   and more Ethernet equipment is capable of handling packets bigger
>   than 1500 bytes.  However, since this capability isn't standardized,
>   it is seldom used today, despite the potential performance benefits
>   of using larger packets.  This document specifies mechanisms to
>   negotiate per-neighbor maximum packet sizes so that nodes on a
>   multipoint subnet may use the maximum mutually supported packet size
>   between them without being limited by nodes with smaller maximum
>   sizes on the same subnet.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-van-beijnum-multi-mtu/
> 
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-van-beijnum-multi-mtu-05
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-van-beijnum-multi-mtu-05
>