"Can EIGRP be configured on a per-neighbor basis, or is it strictly an interface-level configuration? I understand that EIGRP authentication is applied to all neighbors on a given interface, which can be limiting in multi-access networks. If I need different authentication settings for specific neighbors, what strategies can I use? Additionally, I’ve heard about key chains that allow for multiple keys, but can these keys be allocated to different routers individually? How does this all relate to the use of virtual templates in my configuration?"
