Re: [Detnet] Question on TSN over IP data plane

Balázs Varga A <balazs.a.varga@ericsson.com> Fri, 10 September 2021 14:28 UTC

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From: =?iso-8859-1?Q?Bal=E1zs_Varga_A?= <balazs.a.varga@ericsson.com>
To: "Yangfan (IP Standard)" <shirley.yangfan@huawei.com>, "detnet@ietf.org" <detnet@ietf.org>
Thread-Topic: Question on TSN over IP data plane
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Date: Fri, 10 Sep 2021 14:27:58 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/detnet/3QnIwoEY0bEN2Tqyuw-fBKjDqXs>
Subject: Re: [Detnet] Question on TSN over IP data plane
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Hi Fan,

Yes, it has some history in DetNet discussions. There are many RFCs
dealing with encapsulating Ethernet in IP. They can be applied for
"TSN over IP" case:
1, Encapsulate TSN Streams in IP. RFCs already exist on this.
2, Forward the resulted IP Flows as DetNet IP flows (RFC8939).
3, At egress: Decapsulate the TSN Streams from IP.

Cheers
Bala'zs

From: detnet <detnet-bounces@ietf.org> On Behalf Of Yangfan (IP Standard)
Sent: Thursday, August 26, 2021 1:08 PM
To: detnet@ietf.org
Subject: [Detnet] Question on TSN over IP data plane

Hi DetNet,

Please excuse me to ask this dumb question in the following.
I found there are many compositions of TSN/IP/MPLS in DetNet data plane, but TSN over IP is missing. Could anyone kindly explain the reason, or maybe some history if there was?
The reason why I asked this question originates from a case when TSN LAN networks are considered to be connected by a WAN network. Based on the data planes provided by DetNet, it seems MPLS is the only solution for TSN interconnection. Is it the reason that IP itself couldn't provide the entire DetNet capabilities?
Do I miss anything else?

Thanks in advance.

Regard,
Fan