After a free trial, you are going to spend $64.99 per thirty day period for the Start strategy (contains most athletics channels) or $79.99 for each thirty day period for Elite (incorporates more channels). This is a non-copyleft free application license which is incompatible with the GNU GPL. It also describes the applicability of LSP Ping, as in-band, and the handle airplane, as out-band, answers to bootstrap a BFD session.