Re: IEEE 802.1 WG liaison letter to the IETF

[Loa Andersson <loa@pi.se>]

All,

I've been looking at this sentence in the liaison:

Translation of 802.1Q S-VLAN tags (with 12 bit VIDs) is supported
at S-tagged service interfaces, as an option, by the
IEEE Std 802.1ad Provider Bridging amendment to IEEE Std 802.1Q.

Could someone explain if there is a difference between a "S-tagged
service interface" and a "S-tagged interface"?

/Loa

Nurit Sprecher wrote:
> Hi Don,
> I did not say the that liaison says that the IET should focus on the 12
> bit label encoding technique. I said that the IEEE confirmed that the
> 12-bit S-VID translation is a standard behavior. 
> The IETF got a decision not to define the data plane but to get a
> confirmation from the IEEE for the standard behavior. This was achieved
> regarding the 12-bit label encoding technique and we can go on with the
> work already initiated on this.
> Regards,
> Nurit.
> 
> -----Original Message-----
> From: Don Fedyk [mailto:dwfedyk@nortel.com] 
> Sent: Wednesday, September 06, 2006 18:14
> To: Nurit Sprecher; Lucy Yong; Adrian Farrel; ccamp@ops.ietf.org;
> gels@rtg.ietf.org
> Subject: RE: IEEE 802.1 WG liaison letter to the IETF
> 
> Nurit
> 
> Please do not try to interpret the liaison. The Liaison says nothing
> about 
> 
> "The IETF should now focus on the 12 bit label encoding technique".
> 
> It actually states:
> 
> "The protocol entities that make use of a given Ethertype are
> characterized not just by the format of packets 'on the wire' and rules
> for their interchange, but also by their defined interfaces to adjacent
> entities in the interface stack and the MAC relay entity as well as by
> their local management interface interactions"
> 
> In other words just looking like an Ethernet packet with a 12 bit VID
> (or not) on the wire is not the only criterion. The behavior an impact
> on the Ethernet switch needs to be taken into account. In other words
> all schemes including your 12 bit VID still need to be discussed to the
> impact on the interfaces as relays on Ethernet hardware.
> 
> Regards,
> Don 
>  
> 
>> -----Original Message-----
>> From: owner-ccamp@ops.ietf.org
>> This liaison was imitated by the IEEE intentionally to address the 
>> same question that  we wanted to ask the IEEE.
>> The liaison clearly states that (currently) the only standard behavior
> 
>> is the 12-bit VID translation, and the IETF should now focus on the 
>> 12-bit label encoding technique for GELS.
>> Regards,
>> Nurit.
>>
> <SNIP>
> 
> 
> 
> 


-- 
Loa Andersson

Principal Networking Architect
Acreo AB                           phone:  +46 8 632 77 14
Isafjordsgatan 22                  mobile: +46 739 81 21 64
Kista, Sweden                      email:  loa.andersson@acreo.se
                                           loa@pi.se