[c-nsp] 7600-ES20 & QinQ

[Tassos Chatzithomaoglou]

After looking at the 7600-ES20 docs 
(http://www.cisco.com/en/US/products/hw/routers/ps368/products_data_sheet0900aecd8057f3ad.html) i noticed the following 3 features:

QinQ Termination
Selective QinQ
Flexible QinQ

Besides the 1st one which is widely used in routers, i couldn't find any reference on CCO about the other two.
After googling a little, i found out both to be used by Huawei but no detailed info.

Does anyone know more info about these 2 features?


Also, when doing QinQ termination on a 6500/7600 is it possible to make it "internally" without using any physical port for 
termination? Well, i probably guess no, since i would need subinterfaces under SVIs.

If a physical port has to be used, can i just connect the egress port of a 802.1q tunnel to an ES20 port and terminate QinQ there, 
acting like the ES20 was just an external router?

example:
                     7600
                  +--------+ (QinQ termination)
                  |  ES20  |------------+
                  |        |            |
                  |  6724  |---(trunk)--+
(tunnel port)----|  6748  |                        +--------+
                  |  6724  |--------(trunk)---------| router | (QinQ termination)
                  +--------+                        +--------+



Finally, are there any other 6500/7600 cards that support QinQ termination?

-- 
Tassos