Hello Network
EIGRP named mode supports what is known as the Wide Metrics feature. This feature supports 64-bit metric calculations as opposed to EIGRP classic mode that use 32-bit calculations. This results in varying metric values between the two.
Wide metrics was introduced in order to accommodate high-bandwidth interfaces and Ethernet channels. The increase in available speeds has resulted in incorrect or inconsistent routing behavior with the classic EIGRP routing metrics. The lowest delay that can be configured for an interface is 10 microseconds. As a result, interfaces with speeds of 10 Gbps or more including channeld interfaces will appear to EIGRP as a single GE interface. For this reason, the 64 bit metric calculation has been introduced resulting in different metric values. More on this can be found here:
The new 64 bit metric calculations are designed to be backward compatible with classic EIGRP. However, sometimes scaling can be an issue. More on this can be found below.
I hope this has been helpful!
Laz