The EIGRP default polling group is used by Network Protocol Manager for EIGRP to monitor the availability of EIGRP sessions. Network Protocol Manager for EIGRP monitors the availability by monitoring the EIGRPProtocolEndpoints that are discovered on Cisco devices.
Because the enterprise EIGRP MIB is typically not used by Cisco devices, Network Protocol Manager for EIGRP uses CLI to discover and monitor the EIGRP topology for Cisco devices. The EIGRP polling group uses CLI polling to monitor EIGRP sessions by monitoring the EIGRPProtocolEndpoints on the discovered Cisco devices.
The EIGRP polling group has a default setting and an optional setting:
EIGRP CLI Setting (default)
EIGRP EXTERNAL Setting (optional)
The two settings are mutually exclusive, which means that only one or the other (but not both) can be specified for an EIGRP polling group at any given time.