Re: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 use of term "802.2 LLC"

[Alexandre Petrescu <[e-mail]>]

Le 04/02/2017 à 02:35, Dick Roy a écrit :
> I assume by "seen 'LLC' in IPv6 packets ... on ... OCB" you mean you
> have seen wireshark output that has a full LLC SNAP header in the
> MAC frame of a stream containing an IPv6 network layer NPDU (aka
> IPv6 packet).

Wireshark calls that "LLC" not "LLC SNAP".

> Since you are based in Europe, I am not surprised, however, in ALL
> PHY streams in the US and elsewhere (except Europe) you will NOT see
> those 6 useless bytes, only the Ethertype field will be present.
> Hopefully Europe gets its act together sometime soon.

I dont understand you.  It's not a matter of continents.

It depends how the packet was captured: monitor mode, or normal mode.
In monitor mode one can see all 802.11 headers, whereas in normal mode
one can see only "Ethernet II".  The IPv6 layer considers only the
fields of that "Ethernet II" header: MAC addresses and Ethertype.  The
IPv6 layer does not consider the many other fields of 802.11 headers.

Alex

>
> Cheers,
>
> RR
>
> -----Original Message----- From: Alexandre Petrescu
> [mailto:[e-mail]] Sent: Friday, February 3, 2017
> 8:36 AM To: François Simon; 'Russ Housley' Cc: [e-mail] Subject:
> Re: [ipwave] draft-ietf-ipwave-ipv6-over-80211ocb-00 use of term
> "802.2 LLC"
>
>
>
> Le 03/02/2017 à 16:12, François Simon a écrit :
>> While LLC standard is out of scope for 802.11 is concerned, it is
>> still mentioned. Two LLC types:
>>
>> - LLC Protocol Discrimination (LPD) - IEEE Std 802-2014 - ISO/IEC
>> 8802-2:1998 - EPD EtherType Protocol Discrimination (EPD) - IEEE
>> Std 802-2014 - IEEE
> Std
>> 802.3-2012
>>
>> EPD is used for 5.9 GHz Band
>
> Ok, it is good to know.
>
> But is it about the future or about the present? (I have not seen
> "EPD" myself, yet I have seen "LLC" used in IPv6 packets transmitted
> on 802.11 in OCB mode).
>
> The text to be put in IPv6/OCB saying LLC or EPD or SNAP depends on
> that tense.
>
> Alex
>
>>
>> Fygs
>>
>>
>> -----Original Message----- From: its [mailto:[e-mail]]
>> On Behalf Of Russ Housley Sent: Thursday, February 02, 2017 12:57
>> PM To: Alexandre Petrescu <[e-mail]> Cc:
>> [e-mail] Subject: Re: [ipwave]
>> draft-ietf-ipwave-ipv6-over-80211ocb-00 use of term "802.2 LLC"
>>
>>
>> On Feb 2, 2017, at 12:09 PM, Alexandre Petrescu
>> <[e-mail]> wrote:
>>
>>> draft-ietf-ipwave-ipv6-over-80211ocb-00 use of term "802.2 LLC"
>>>
>>> Hello IPWAVErs,
>>>
>>> It has been suggested that the term "802.2 LLC" may not be
>>> relevant because in the next version of the IEEE 802.11 standard
>>> the LLC will no longer be based on IEEE 802.2.
>>>
>>> As such, I propose the following change:
>>>
>>> old:
>>>> The IPv6 Networking is layered on top of the IEEE 802.2
>>>> Logical-Link Control (LLC) layer; this is itself layered on
>>>> top of the 802.11p MAC; this layering illustration is similar
>>>> to that of running IPv6 over 802.2    LLC over the 802.11 MAC,
>>>> or over Ethernet MAC.
>>>
>>> new:
>>>> The IPv6 Networking is layered on top of an IEEE 802.11 LLC
>>>> layer; this is itself layered on top of the 802.11 MAC layer;
>>>> this layering illustration is similar to that of running IPv6
>>>> over 802.2 LLC over the IEEE 802.3 (Ethernet) MAC.
>>
>> I think that talking about Ethernet is causing confusion.  Perhaps
>> it
> would
>> be more straightforward to say that SNAP [RFC1042] is used to
>> carry the
> IPv6
>> Ethertype.
>>
>> Russ _______________________________________________ its mailing
>> list [e-mail] https://www.ietf.org/mailman/listinfo/its
>>
>>
>
>
>
>