Setting the DSCP code point for host-originating IS-IS traffic sent over a GRE tunnel

You can determine traffic prioritization for IS-IS traffic originating on a host and being sent over a GRE tunnel by assigning a DSCP code point to the IS-IS packets. You can set the DSCP code point by including the isis-over-gre dscp-code-point value statement at the [edit class-of-service host-outbound-traffic protocol] hierarchy level.