I'm doing device discovery and I noticed that eigrp is not an option for discovery.....any reason why?
This is due to lack of MIB support at the time of development. Both BGP and OSPF have had MIB support for a long time that provides peer information via SNMP. The CISCO-EIGRP-MIB is fairly new, and is not yet supported everywhere. Certainly, though, an enhancement could be rasied to add EIGRP support.