Re: [ipwave] Fwd: Re: [6lo] Call for feedback to draft-wachter-6lo-can-00

Alexandre Petrescu <alexandre.petrescu@gmail.com> Mon, 28 October 2019 12:03 UTC

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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Subject: Re: [ipwave] Fwd: Re: [6lo] Call for feedback to draft-wachter-6lo-can-00
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Le 24/10/2019 à 16:42, Alexander Wachter a écrit :
[...]
>> I want to ask you whether you think that the end to end principle is a 
>> good thing for the Internet, and if yes, whether Ethernet Border 
>> Translators might have an impact on that principle.
> 
> The Ethernet Border Translator is optional for a 6LoCAN network.
> I designed the Border Translator out of the lack of router capabilities 
> of the Zephyr RTOS. This principle allows pushing complexity towards 
> already existing network equipment and infrastructure.

Could the Border Translator, with Zephyr RTOS, have a driver for an 
802.11-OCB card?  (preferably ath9k of Atheros).  This would make for a 
great router for cars with many QoS-enabled applications.

Alex

> 
> Sincerely,
> 
> Alexander
> 
> 
>> Le 17/10/2019 à 17:25, Alexander Wachter a écrit :
>>> Dear 6Lo WG,
>>>
>>> I recently submitted a draft for IPv6 over Controller Area Network 
>>> and would like to call for adoption by the 6Lo WG.
>>> The title of the document is draft-wachter-6lo-can-00 [1].
>>>
>>> Controller Area Network (CAN) is a widely used field bus initially 
>>> designed for the automotive domain. It has a payload length of eight 
>>> bytes for classic CAN and 64 bytes for CAN-FD. CAN only describes the 
>>> data-link-layer, but various protocols already exist on top. The 
>>> submitted draft introduces IPv6 over CAN (6LoCAN),  a 
>>> 6lo-adaption-layer to send IPv6 packets over the constrained CAN-bus. 
>>> 6LoCAN uses a subset of the already widely used ISO-TP standard for 
>>> fragmentation and reassembly to meet the 1280 minimum MTU requirement 
>>> of IPv6. It also uses the IPHC (RFC6282) to reduce the protocol 
>>> overhead of IPv6.
>>>
>>> A broad range of devices, from small and cheap MCUs to big 
>>> application processors, already have CAN controllers onboard. With 
>>> 6LoCAN, it is possible to create networks of resource-constrained 
>>> MCUs that can leverage the broad range of protocols and security 
>>> mechanisms built on top of the IP.
>>> Additionally, multiple 6LoCAN networks can be connected together or 
>>> even to the internet by utilizing the routing capabilities of IP 
>>> networks.
>>>
>>> A reference implementation of 6LoCAN already exists in the mainline 
>>> Zephyrproject RTOS [2] tree. It includes a sample server-client 
>>> application. The source for it is located under [3] and can be used 
>>> on any boards supporting CAN.
>>>
>>> I am looking forward to your comments on the draft.
>>>
>>> Kind regards,
>>> Alexander
>>>
>>> [1] https://datatracker.ietf.org/doc/draft-wachter-6lo-can/
>>> [2] https://www.zephyrproject.org/
>>> [3] 
>>> https://github.com/zephyrproject-rtos/zephyr/tree/master/samples/net/sockets/echo_client 
>>>
>>>
>>
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> 
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