There is information to get currently reserved and unreserved port information from a script and is mentioned in the Knowledge Base: https://support.spirent.com/SpirentCSC/SC_KnowledgeView?cid=null&id=SOL12175 (note you need to login to the site to view the article, just sign up if you don't have one.)
But nothing like being asked in questions 1 and 2.
As for any control plane traffic, our newer modules send LLDP information at a rate of 1 fps when the port is unreserved and will stop when the port is reserved.
87 People are following this question.