Re: [ipwave] IPWAVE Side Meeting

[Chris Shen <[e-mail]>]

Hi Alex,

Thanks for the information.

I will configure a monitor mode to capture the packet information again.

For the ND, when we turn the OCB mode on, the IPv6 ND was not automatically
running.
Here what I mean is the SLAAC (link-local address) is not autoconfigured by
EUI-64 or other methods.
Because of no link-local address, the NS/NA were not sent and neighbor
cache could not
been built either.

What I did is that I manually configured an IPv6 address for the interface,
and then the link-local address was automatically generated based on MAC
address. However,
the NS/NA messages were still not transmitted, so I manually added a
neighbor for the
interface. After this step, the interface started periodically sending NS
messages to
the neighbor what I added, which to make sure the neighbor is alive.

Since there is no router in our experiment, the DAD process was not
triggered.

Regarding the 2001:db8:: address, I just selected it based on our drafts. I
may select other IPv6 addresses for experiments in the
future. Thanks for the information.

Thanks!
Chris.



On Wed, Dec 4, 2019 at 7:28 PM Alexandre Petrescu <
[e-mail]> wrote:

> 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]>
>


-- 
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]