This document describes the EOS SDK next hop group version number feature. The feature exposes a version number for each next hop group to clients interacting with EOS SDK. The version number is incremented when the next hop group is modified. 

EOS SDK Next Hop Group EOS 4.28.1F

When packets are encapsulated in tunnels via protocols such as GRE, sFlow samples with version 5 default extensions

Sflow 7280 4.22.0F Tunnel Extension Next Hop Group