This feature allows the configuration of custom DSCP-to-DSCP maps on a per-Nexthop Group (NHG) basis. When applied it rewrites the DSCP of the outer IP header of IPvX-in-IPvX (X represents both v4 and v6) encapsulated packets using the inner IPvX header’s DSCP value while ensuring the DSCP of the inner IPvX overlay is preserved.