With similar logic ...
... I am the handsomest prince in all the land because I have a bicycle.
They say the last time they sued was eleven years ago. We have no idea how often they threatened to sue, or how may products were never developed because Cisco would either sue or require royalties big enough to make a new product uncompetitive.
If Cisco had 0% market share, then this lawsuit could not be about protecting market share. Having 80% is not evidence that is is not about protecting market share.
If Cisco had shut up, the only 'evidence' would have been the rantings of a defendant in legal trouble. As Cisco needed to prove they are not a patent bully with defective logic, they have convinced me that Arista's claims have some merit. Also I think the only thing that having 13,000 patents proves is that the patent system is badly broken.