Dear reviewer,
Thank you for your comments.
Kindly, see my answers in-line below.
On Thu, Jun 27, 2019 at 5:38 PM Joerg Ott via Datatracker <noreply@xxxxxxxx> wrote:
Reviewer: Joerg Ott
Review result: On the Right Track
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The draft discusses the most basic operation of IPv6 over IEEE 802.11-OCB,
i.e., a flavour of ad-hoc networks specifically for vehicular connectivity (formerly
known as IEEE 802.11p). The document mainly covers question of mapping IPv6
packets to the MAC layer frames, discusses aspects of address assignment and
subnets, and neighbour discovery. The core document is rather short but has
extensive appendices.
There are no clear transport issues in this document. The main relevant aspect would
be MTU size, which is in line with standard IPv6. But the document discusses (section 4.2)
that all IPv6 packets should be mapped to the same class of service. So, there is no
service differentiation expected (diffserv, for example)?
We have not treated this detail in the current document.
However, I do not consider the document to be really ready because of structure
and writing clarity. This is surprising for version -46! There is a need for improvement
to make the document properly understandable by the reader. I am actually wondering
why this document is sent out for last call given the state the text is in.
The document will be proofred once again before becoming an RFC.
Detailed comments:
In several places, the text reminds of patent jargon. Should I worry? There doesn't appear
to be any IPR disclosure.
p5, 1st line: packet->packets
Are you referring to page 5 or paragraph 5?
The use of RFC 2026 language needs improvement.
I didn't get your point. Would you please clarify on how we can tackle this issue, if any?
sect. 4.4: transition time is not defined
The IP-OBUs that are based on embedded platforms can only use the former (MAC-based) whereas more powerful platforms (native x86) can use RFC8064. The majority of IP-OBUs are embedded platforms. I'm not sure whether they can use RFC8064.
"no generic meaning" -- means what?
No generic meaning' - means that the bits in the Interface Identifiers are 'opaque'. Earlier, the u/g bits in IID had a significance (it meant 'unique/global'). A concept updated by RFC7136.
This section is confusing. Please describe a concrete sequence of actions.
Would you show us how we can improve this section?
sect. 4.5: external references for standards are surely the right way. But
the reader may benefit from some informal self-contained description.
sect. 4.5.2: anythings needs to be said about multicast reception?
sect 4.6: Clarify "A subnet may be formed over 802.11-OCB interfaces of
vehicles that are in close range (not by their in-vehicle interfaces)." further.
sect. 5: explain briefly how certificates are supposed to work with variable addresses.
App. E: why would high mobility affect encapsulation"?
App. G: Ok to show complete packet formats. But then maybe also give specific examples?
And why do you describe this as capturing what is received rather than how to construct
something to sent out?
App. I: reliable multicast used incorrectly
"TBD TBD TBD"
Nits: "mode.A", "; The", "on another hand", "At application layer"
"attacker can therefore just sit in the near range of vehicles"
"perform attacks without needing to physically break any wall."
"embarking an"
"outdoors public environments"
"attacker sniffers"
"indoor settings"
"eventual conflicts"
"internet"
expand all acronyms, also in the appendices
Why has sect. 5.3 bullets?
Best Regards
Nabil Benamar
Associate Professor
Department of Computer Sciences
School of Technology
Moulay Ismail University
Meknes. Morocco