I'm thinking of writing a (not)EIGRP for GNU/Linux.
However, I've got a concern about this because it is proprietary to Cisco.
If I make a program that interacts with real EIGRP in the same way could this be a legal concern, or am I just paranoid? I know I'd be writing it from scratch and I haven't seen any of the cisco source code, nor reverse engineered anything. But network packets are fair game to look at, correct?