Legality issues?
 

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?

-Adrien

In my opinion if you broadcast it then it is available for scrutiny. However, if you want solid legal advice asking a (good) lawyer is the only way to get it.