Re: [6lo] New I-D draft-delcarpio-6lo-wlanah-00.txt

[Alexandru Petrescu <[e-mail]>]

Hi,

Le 17/06/2015 11:02, Felipe Del Carpio a écrit :
> Dear all,
>
> We present how 6LoWPAN can be used to efficiently transport IPv6 over
> 802.11ah, this is a first version.

Will subGhz 802.11ah be the same in each country?  Or not?

We know for example that 802.11a is not deployed, not marketed, and not 
important at all in the country where I live; yet it is important in 
other countries.

Is 802.11ah specific to a particular country?  We know that some 
802.11"letter" works in only one particular country.

> Some of our concerns in study:
>
> 1) At the end of section 6, this text was written " For
> non-link-local addresses a 64-bit IID MAY be formed by utilizing the
> 48-bit MAC device address.  Random IID can be generated for 6LN using
> alternative methods such as [I-D.ietf-6man-default-iids]." Is this
> sufficient?

I think that "MAY" is good - it is good to refer to any I-D
or RFC in this privacy space, to make the tracking based on MAC
addresses  more difficult to attackers.  The default-iids draft is good,
and there is also RFC7217.

Further along the lines of a "MAY" I would like to suggest that not only
utilisation of MAC be a "MAY" but also the 64bit length of an IID be a
MAY, let me explain why.

I think link-local addresses are not necessarily an issue with the /64
bit limit, because their prefix is a constant fe80.

But the globally unique, and ULAs, addresses may have some issue if
auto-configured with SLAAC.

Will an 802.11ah interface be built-in into a cellular phone, 
smartphone?  Because 802.11ah energy savings may be very relevant for 
cellular phones more than for any other routers.

But cellular phones (smartphones) are not able to run 
statelessautoconf/Ethernet on the 802.11ah interface,
because the interface ID is 64bit length.

In that case, it may be possible to use an Interface ID of length 48bit
(the MAC address on 802.11ah).

> 2) How to use 6CO option along with Router advertisements for
> compression context?
>
> 3) Section 8

The section 8 is about HC.

I would like to ask whether HC means to eliminate the IPv6 Base Header
and if yes then the subsequent question is whether we can still consider
this to be "IPv6 over..." when there is no IPv6.

Because RFC2460 says that the IPv6 Base Header is mandatory.

> We would appreciate your comments and suggestion on this draft.

I would to like to comment to ask whether you have packet dumps of
IPv6/802.11ah?  And wireshark dissectors?

About the security considerations section:
Is e2e IPsec security still afforded even though an intermediary router 
must hold keys for eliminated/reinserted IPv6 base header?

Thanks,

Alex

>
> Thank you very much in advance,
>
> Felipe, Ines and Roberto
>
> --------------------------------------------------------
>
> A new version of I-D, draft-delcarpio-6lo-wlanah-00.txt has been
> successfully submitted by Maria Ines Robles and posted to the IETF
> repository.
>
> Name:		draft-delcarpio-6lo-wlanah Revision:	00 Title:		IPv6 over
> 802.11ah Document date:	2015-06-17 Group:		Individual Submission
> Pages:		15
> URL:https://www.ietf.org/internet-drafts/draft-delcarpio-6lo-wlanah-00.txt
>
>
Status:https://datatracker.ietf.org/doc/draft-delcarpio-6lo-wlanah/
> Htmlized:https://tools.ietf.org/html/draft-delcarpio-6lo-wlanah-00
>
>
> Abstract: IEEE 802.11 is an established Wireless LAN (WLAN)
> technology which provides radio connectivity to a wide range of
> devices.  The IEEE 802.11ah amendment defines a WLAN system operating
> at sub 1 GHz license-exempt bands designed to operate with
> low-rate/low-power consumption.  This amendment supports large number
> of stations and extends the radio coverage to several hundreds of
> meters.  This document describes how IPv6 is transported over
> 802.11ah using 6LoWPAN techniques.
>
> _______________________________________________ 6lo mailing list
> [e-mail] https://www.ietf.org/mailman/listinfo/6lo
>
>