[c-nsp] Regarding QinQ and 802.1ad-2005

[Tassos Chatzithomaoglou]

Hi Arnab,

Arnab Bakshi wrote on 18/4/2007 8:01 πμ:
> Hi All,
> 
>    I have been experimenting with QinQ a few days and I came across
> some issues and questions I would like to put forward.
> 
>    My question is whether QinQ or 802.1Q which is said to be supported
> by cisco 3550, 7206 series switch/router is the same as the QinQ
> tunnelling that is defined in 802.1ad-2005?
> 
>   As per my understanding the 802.1Q tunneling is just to stack one
> more VLAN tag with the TPID value set to 0x8100 or 0x9100 which is
> supported by cisco and some other DUTs.
> 
>   As per 802.1ad-2005 there is a new ethertype 0x88a8 for the service
> TAG to be inserted by the provider edge/provider bridges.
> 

Although the idea is the same, Cisco's implementation is not fully compatible with it.
You can also have a look here : http://marc.info/?l=cisco-nsp&m=116353142611271&w=2

>   Also if 802.1ad-2005 is different then can anybody tell about which
> cisco box supports IEEE 802.1ad-2005.
> 

Currently Cisco doesn't support it, but we were told that 7600 will support it soon.

--
Tassos

> Thanks in advance.
> 
> Regards
> Arnab
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