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Re: [Detnet] VXLAN for DetNet

Florian Kauer <florian.kauer@linutronix.de> Thu, 20 July 2023 12:52 UTC

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Date: Thu, 20 Jul 2023 14:51:53 +0200
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To: Balázs Varga A <balazs.a.varga=40ericsson.com@dmarc.ietf.org>, DetNet WG <detnet@ietf.org>
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From: Florian Kauer <florian.kauer@linutronix.de>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/detnet/rKjx9f1HcY6Aq-1ugttxQe4YVyY>
Subject: Re: [Detnet] VXLAN for DetNet
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Hi Bala'zs,
thanks for your response!

After reading the RFC9024 (TSN over MPLS) before, I assumed it would be
an alternative to a VXLAN-based approach and not a complement.
My assumption was that separation of multiple L2 domains (as provided
by the VXLAN Network Identifier) is already provided by the separation
of DetNet streams. Also in Figure 3 of RFC9024 there is nothing drawn
between TSN-L2 and d-CW.

So, does incorporating VXLAN actually provide an advantage in this scenario
over plainly transmitting the TSN-L2 frames via MPLS (or even IP if we
identify the streams according to RFC8939)?

Thanks,
Florian

On 13.07.23 14:52, Balázs Varga A wrote:
> Hi Florian,
> 
> Shortly: yes.  
> 
> Somewhat longer: DetNet allows to use any "L2 over IP" tunneling method, including but not limited to VxLAN.
> RFCs You might be interested regarding interconnecting TSN domains via DetNet:
> - RFC9024: Deterministic Networking (DetNet) Data Plane: IEEE 802.1 Time-Sensitive Networking over MPLS 
> - RFC8939: Deterministic Networking (DetNet) Data Plane: IP
> +1 if You need "service protection" and having an IP-only network: draft-ietf-detnet-mpls-over-ip-preof-04
> (Deterministic Networking (DetNet): DetNet PREOF via MPLS over UDP/IP)
> 
> Cheers
> Bala'zs
> 
> -----Original Message-----
> From: detnet <detnet-bounces@ietf.org> On Behalf Of Florian Kauer
> Sent: Thursday, July 13, 2023 10:37 AM
> To: DetNet WG <detnet@ietf.org>
> Subject: [Detnet] VXLAN for DetNet
> 
> Hi WG,
> has anyone already considered VXLAN (RFC 7348) in the DetNet context?
> It MIGHT be a feasible option to transparently connect two TSNs together via a DetNet.
> Do you have any thoughts on that topic if that would be a feasible approach or if there are better alternatives?
> 
> Greetings,
> Florian
> 
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