The IP address of the next-hop to which a packet for this host are forwarded. This could be same as ffHostCacheDestAddr if the next-hop is the end-host as well. When creating a static entry, this object should be set with the IP address of the next-hop (router) for a host which is not directly connected to our system and with the IP address of the host itself for a host which is directly connected to us. A set on this object for an entry whose ffHostCacheEntryType is dynamic is not permitted.
Sources for this description
Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community)