Re: [ipwave] IPWAVE Side Meeting

[Alexandre Petrescu <[e-mail]>]

I would like to make an additional remark, even though it might not be 
targeted to IPWAVE in particular, but more generally related to IPv6 
experimentation in general.

The 2001:db8:: addresses should not be used on computers, but on paper.

In order to use something quickly on computers, I rather suggest 
addresses like 1::1 and 1::2.  Other purists may suggest the ULA 
prefixes, like fd00::1 and fd00::2.

But certainly not the 2001:db8::, which is called the 'Documentation 
Prefix' for a reason.

Alex

Le 04/12/2019 à 11:28, Alexandre Petrescu a écrit :
> Hi Chris,
> 
> Le 04/12/2019 à 06:23, Chris Shen a écrit :
>> Hi Alex,
>>
>> Here I share wireshark packet dump file from the experiment of the 
>> hackathon.
>> These packet information were collected during webcam streaming 
>> between two DSRC-enabled laptops.
> 
> Thank you for the packet dumps.
> 
> In the dumps I can see indeed UDP/IPv6 packets, supposedly for video 
> stream.
> 
> However, I can not see the link layer headers, like 802.11 headers; I 
> only see EthernetII headers.  The link layer headers can be captured in 
> monitor mode, not in normal mode.  For that, there might be a need to 
> create a special interface (like wlan0 or so) with a command (maybe iw) 
> and capture on that interface, instead of capturing on the normal 
> interface.
> 
>> If you have any questions, please let me know.
>>
>> BTW, when you setup your experiment platform, how did the IPv6 
>> neighbor discovery work?
>> Was it automatically running, or you need to manually configure it?
> 
> ND worked fine.
> 
> We do configure manually a few things for the initial connectivity: the 
> channels, the link-local addresses and some routing table entries.
> 
> 'ND' has many parts: DAD, SLAAC, NS/NA, and others.
> 
> I am not sure which part of ND you doubt it might not work.
> 
> The part that I doubt very much is the following: when the card comes up 
> it must send an NA for its own address, to a multicast group;  but has 
> this router, and the others, joined that group already? (MLD REPORT), or 
> probably not.  If yes, then that initial NA has the right effect.  If 
> not (the group is not yet formed), then the effect of that NA is lost - 
> another computer might form same LL address and DAD be nullified.
> 
> In our settings, such a situation could be provoked: start a car remote 
> from this car, and then bring it closer.  But we never faced it, because 
> we always start the cars at the same time and place.
> 
> Another part of ND that might not work as appropriate is the use of RIO 
> in the RA.  We rely on these RIOs to establish IP paths between cars. 
> These some times was failing in our initial tests, but we improved it, 
> with some pre-learned manually configured data, and other 
> pre-conditions.  We wrote software to achieve that.
> 
> SO, I am not sure which ND part you think about.
> 
> What kind of ND proble do you foresee?
> 
> Alex
> 
>>
>>
>> Thanks!
>> Chris.
>>
>>
>> On Wed, Nov 27, 2019 at 6:41 PM Chris Shen <[e-mail] 
>> <mailto:[e-mail]>> wrote:
>>
>>     Hi Alex,
>>
>>     I answer your questions as follows:
>>
>>         - is the manual available? ("Made a new manual for running OCB
>>         mode")
>>
>>     Yes, it is in the following github link:
>>     
>> https://github.com/ipwave-hackathon-ietf/ipwave-hackathon-ietf-106/blob/master/IPWAVE-Manual-Hackathon-IETF106-v0.2.pdf 
>>
>>
>>
>>         - have you made a patch file?
>>
>>     I didn't make patch file for this implementation.
>>     Based on existing resources, there are some patch work to enable
>>     OCB mode in the Linux kernel.
>>     One of them is much concrete, which was made by Czech Technical
>>     University
>>     in Prague and Volkswagen.
>>     The resource link is as follows:
>>     https://ctu-iig.github.io/802.11p-linux/
>>     But when I follow their instructions to configure OCB mode, there
>>     are some unclear steps and some compiling errors coming out,
>>     so I have modified the Makefile and explored other ways to configure
>>     OCB mode, which is shown in the manual.
>>
>>         - did you use a notion of QoS?  For example, can you send us a
>>         wireshark
>>             packet dump made in monitor mode, of the IPv6 packets used
>>         for video
>>             streaming between the two laptops?  These packets have
>>         802.11 QoS Data
>>             headers or just 802.11 Data headers?
>>
>>     I didn't use QoS. For the current webcam streaming, I use gst-launch
>>     from Gstreamer. This gst-launch uses UDP and RTP to stream webcam.
>>
>>     I checked packet dump, there is no QoS information, so I believe the
>>     packets
>>     just use 802.11 Data headers.
>>     I will send you the packet dump later, since I didn't save them.
>>
>>         - the wifi card wilocity is on USB or is it internal to the 
>> laptop?
>>
>>     For the current test, we replaced the original wifi card inside a
>>     laptop
>>     with an Athero wifi card using ath9k driver. This wifi card uses
>>     PCIe-mini
>>     interface to connect with the laptop.
>>     We also use the laptop internal antennas for 5.9GHz band. Initially,
>>     we are not sure if the antennas of the testing laptop can support
>>     5.9GHz
>>     band, so we connect the wifi card with external antennas that
>>     support 5.9GHz.
>>     After testing, we found that the laptop internal antennas can also
>>     support
>>     5.9GHz band, so we just use them.
>>     If you have a USB dongle that has PCIe-mini interface, I believe an
>>     Atheros wifi
>>     card can work as well, but you need to have external antennas to
>>     connect with
>>     the wifi card on the USB dongle.
>>
>>     Thanks!
>>     Chris.
>>
>>
>>     On Tue, Nov 26, 2019 at 9:56 PM Alexandre Petrescu
>>     <[e-mail] <mailto:[e-mail]>>
>>     wrote:
>>
>>         Hi Chris,
>>
>>         With respect to the Hackathon slides, my colleague and I would
>>         like to
>>         ask you:
>>
>>         - is the manual available? ("Made a new manual for running OCB
>>         mode")
>>         - have you made a patch file?
>>         - did you use a notion of QoS?  For example, can you send us a
>>         wireshark
>>             packet dump made in monitor mode, of the IPv6 packets used
>>         for video
>>             streaming between the two laptops?  These packets have
>>         802.11 QoS Data
>>             headers or just 802.11 Data headers?
>>         - the wifi card wilocity is on USB or is it internal to the 
>> laptop?
>>
>>         Yours,
>>
>>         Alex
>>
>>         Le 21/11/2019 à 08:13, Chris Shen a écrit :
>>          > Hi its,
>>          >
>>          > Here I share side meeting slides for IPWAVE WG.
>>          >
>>          > Please join us to give your opinions and suggestions about
>>         the work in
>>          > IPWAVE WG.
>>          >
>>          > We really need your input! ^_^
>>          >
>>          > Thanks!
>>          > Chris.
>>          >
>>          >
>>          >
>>          > On Thu, Nov 21, 2019 at 11:12 AM Mr. Jaehoon Paul Jeong
>>          > <[e-mail] <mailto:[e-mail]>
>>         <mailto:[e-mail] <mailto:[e-mail]>>>
>>         wrote:
>>          >
>>          >     Hi IPWAVE WG,
>>          >
>>          >     There will be a side meeting for I2NSF WG's next steps
>>         from 3:30PM
>>          >     to 4:30PM today
>>          >     at Bras Basah.
>>          >
>>         
>> https://datatracker.ietf..org/meeting/106/floor-plan?room=bras-basah#raffles-city-convention-center 
>>
>>          >          
>>  <https://datatracker.ietf.org/meeting/106/floor-plan?room=bras-basah#raffles-city-convention-center> 
>>
>>          >
>>          >
>>          >     The agenda for IPWAVE side meeting is as follows:
>>          >
>>          >     - IPWAVE Hackathon Project (Yiwen Chris Shen, 5 min)
>>          >     - IPWAVE Problem Statement Draft (Jaehoon Paul Jeong, 5 
>> min)
>>          >     - Vehicular Neighbor Discovery Draft (Yiwen Chris Shen, 5
>>         min)
>>          >     - Vehicular Mobility Management Draft (Yiwen Chris Shen,
>>         5 min)
>>          >     - Security and Privacy Draft (Jaehoon Paul Jeong, 5 min)
>>          >     - Context-Aware Navigator Draft (Yiwen Chris Shen, 5 min)
>>          >     - Open Discussion for IPWAVE WG Progress (30 min)
>>          >
>>          >     The main purpose of this side meeting is to share the
>>         progress of
>>          >     IPWAVE PS draft and the IPWAVE hackathon project using
>>         the video
>>          >     delivery in the Linux system for IPv6 over IEEE 
>> 802.11-OCB.
>>          >
>>          >     I would like to explain the status of our WG and the
>>         importance of
>>          >     the IPWAVE PS draft for the next step of our WG.
>>          >
>>          >     Welcome your engagement and feedback.
>>          >
>>          >     Thanks.
>>          >
>>          >     Best Regards,
>>          >     Paul
>>          >
>>          >     --
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>>          > --
>>          > Yiwen (Chris) Shen, Ph.D. Candidate
>>          >
>>          > Homepage: https://chrisshen.github.io
>>          > IoT Lab: _http://iotlab.skku.edu <http://iotlab.skku.edu/>_
>>          > Sungkyunkwan University, Suwon, South Korea
>>          > Mobile:[phone]
>>          > Email: [e-mail] <mailto:[e-mail]>
>>          > <mailto:[e-mail] <mailto:[e-mail]>>
>>          >
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>>
>>
>>     --     Yiwen (Chris) Shen, Ph.D. Candidate
>>
>>     Homepage: https://chrisshen.github.io
>>     IoT Lab: _http://iotlab.skku.edu <http://iotlab.skku.edu/>_
>>     Sungkyunkwan University, Suwon, South Korea
>>     Mobile:[phone]
>>     Email: [e-mail]
>>     <mailto:[e-mail]>
>>
>>
>>
>> -- 
>> Yiwen (Chris) Shen, Ph.D. Candidate
>>
>> Homepage: https://chrisshen.github.io
>> IoT Lab: _http://iotlab.skku.edu <http://iotlab.skku.edu/>_
>> Sungkyunkwan University, Suwon, South Korea
>> Mobile:[phone]
>> Email: [e-mail]
>> <mailto:[e-mail]>
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