On 16/10/2011 08:34, Gert Doering wrote: > *Then* show him the ASR9k CWDM license bill..." You only need A9K-ADV-OPTIC-LIC= if you need to use forward error correction with a passive wdm system. If you can run your passive wdm network without FEC or else if you run an active wdm system, then there's no requirement for the license. Nick