I have two ASA 5580 Firewalls that are used in an IPSec branch tunnel between two sites. I would like to extend my VLANs between the two sites. Does the ASA 5580 support QinQ? can someone point me to a document that describes the configuration process would be great. If there is another technique then I am open to it, however I have to use the ASA 5580 firewalls.