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Re: draft-gont-6man-slaac-renum-01

Mark Smith <markzzzsmith@gmail.com> Mon, 25 March 2019 01:10 UTC

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From: Mark Smith <markzzzsmith@gmail.com>
Date: Mon, 25 Mar 2019 12:10:09 +1100
Message-ID: <CAO42Z2yLii6YU+niFoEwX=xJrrAQ0Roc7xtEDpE9oF=MMJng=w@mail.gmail.com>
Subject: Re: draft-gont-6man-slaac-renum-01
To: Sander Steffann <sander@steffann.nl>
Cc: Brian E Carpenter <brian.e.carpenter@gmail.com>, Fernando Gont <fgont@si6networks.com>, IETF IPv6 Mailing List <ipv6@ietf.org>, Erik Kline <ek@loon.co>
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On Mon, 25 Mar 2019 at 10:14, Sander Steffann <sander@steffann.nl> wrote:
>
> Hi,
>
> >> This would basically be a host sending a packet from itself to itself
> >> via the router.
> >
> > How do you make that happen if the prefix is on-link?
>
> Send it to the MAC address of the router and let the router bounce it back.
>

That may not be as easy as it sounds.

Not sure about other OSes, however the Linux kernel by default drops
packets it receives over the network with source addresses match its
own local addresses.

It can be switched off, however that would mean changing a default on
a lot of hosts.

accept_local - BOOLEAN
Accept packets with local source addresses. In combination with
suitable routing, this can be used to direct packets between two
local interfaces over the wire and have them accepted properly.
default FALSE

Regards,
Mark.


> Cheers,
> Sander
>
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