[j-nsp] ERX ERX-EM-LTU license

[Jose Sanchez]

Hi

I have an ERX1400 series, the license ERX-EM-LTU appears on the system
price list as an event mirroring licence, but there is no information
in the documentation about how I activate it and if it is really
needed for packet mirroring or any other feature, please let me know
if anyone have more information that is not public on the web.

Thanks in advance

JAS