Re: [manet] IETF 114 manet meeting presentation

[Henning Rogge <[e-mail]>]

On Fri, Jul 22, 2022 at 3:44 PM Adamson, Robert B CIV USN NRL (5592)
Washington DC (USA) <brian.adamson=[e-mail]>
wrote:
>
> Ron, Henning,
>
> I am not sure if I can participate in the live meeting next week, but I could provide some information and even slides to Henning (if he’s interested)  on the nrlsmf data plane.  The current code has evolved a bit since we last presented an overview at an IETF meeting.   Or if you want to identify this as a possible future presentation if there’s interest let me know.

I think some information about how SMF its doing the data plane would
be interesting, I am just not sure if I could present your way how to
implement it.

> My current “go to” approach for the data/forwarding plane as a user-space process has been to use a combination of PF_PACKET socket (on Linux … other mechanisms on the other operating systems supported that includes MacOSX, Windows, Android, and other Unix platforms). and a Tun/Tap virtual interface with the protocols configured on the Tun/Tap interface.

Tun/Tap can be a great alternative to PF_PACKET sockets... especially
because they play much nicer with complicated network setups, e.g.
policy routing.

> This is a  topic of particular interest for me.  One thing I have been doing is more clearly separating the data/forwarding plane aspects of SMF/Elastic Multicast implementation from the control plane.  There are some events triggered by things that happen in the data plane (e.g., detection of multicast flow activity/inactivity) and part of the approach is achieve sufficient functionality while minimizing what happens in the forwarding plane and limiting the amount of interaction between the control plane and data plane.  Some of our work has included working with Open vSwitch (OvS) and I have been looking at this in the interest of what data/forwarding plane functionality could be embedded within OvS to support MANET multicast.   The idea would be then to have an option besides the user-space forwarding engine approach currently used.

Has anyone ever tried to use EBPF to implement a hash-based duplicate detector?

> From: manet <[e-mail]> on behalf of "Velt, R. (Ronald) in 't" <Ronald.intVelt=[e-mail]>
> Date: Friday, July 22, 2022 at 5:19 AM
> To: "Rogge, Henning" <[e-mail]>, "[e-mail]" <[e-mail]>
> Cc: "[e-mail]" <[e-mail]>
> Subject: Re: [manet] IETF 114 manet meeting presentation
>
> Hi Henning,
>
> That would certainly be a useful contribution to our session, in my opinion. I checked with the chairs of the other groups: there was positive feedback from Donald Eastlake and silence from the ROLL chairs (which we will interpret as approval 😊 How much time do you think you need? I’ll adapt the agenda accordingly once I get to Philly. (Am travelling today).

I would like to keep the talk short, but I have yet to finalize the talk.

Henning Rogge