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Date: Mon, 5 Aug 2019 08:32:32 -0700
From: Stephen Hemminger <stephen@networkplumber.org>
Message-ID: <20190805083232.202d0d47@hermes.lan>
In-Reply-To: <A23F6E83-0634-4BFA-AE82-DA947D3544CF@aim.com>
References: <A23F6E83-0634-4BFA-AE82-DA947D3544CF@aim.com>
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Subject: Re: [Bridge] Split path for packets,
 and bridge configuration problem.
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To: John Clark via Bridge <bridge@lists.linux-foundation.org>
Cc: John Clark <jeclark2006@aim.com>

On Wed, 31 Jul 2019 11:55:37 -0700
John Clark via Bridge <bridge@lists.linux-foundation.org> wrote:

> I=E2=80=99m trying to configure a Linux system to bridge an ethernet link=
 for packet ingress from a local network and combine that with a radio link=
 for the reply packet egress.
>=20
> I vaguely recall something like this use to be used for Satellite links, =
where the incoming packets from the outside world were via the Sat link, bu=
t outgoing packets were via a terrestrial link, phone modem or DSL, dependi=
ng.
>=20
> What I have working is the packet entering the bridge on the ethernet lin=
k, then I see the MAC address of the node from the in the =E2=80=98bridge s=
how=E2=80=99 output, but even if I assign the MAC address to the =E2=80=98r=
adio=E2=80=99 tap interface, I see both the =E2=80=98ethernet=E2=80=99 port=
 as =E2=80=98master=E2=80=99, and the tap device as =E2=80=98self=E2=80=99,=
 but no packets are sent to the tap device.
>=20
> In the past I=E2=80=99ve just written user apps that basically implement =
tunnels and using collection of such apps and taps, gotten packets to where=
 I need them to be.
>=20
> I was trying to use more standard tools, and not write more custom code.
>=20
> Thanks for any assistance.
> John Clark.
>=20

Hacks like this are best done with netfilter.