Static Type of Service (TOS)/Traffic Class on GRE tunnels

Junos OS supports the setting of a static ToS/Traffic Class value in the IPv4/IPv6 header, respectively, of a GRE tunnel. You can set a traffic-class value at the interfaces interface-name unit logical-unit-number tunnel hierarchy level. The value ranges from 0-255 and should be chosen based on the desired DSCP/PREC value. For example, if a DSCP value of 0b111 000 or 0x38 is desired, then configure the traffic-class value to be 224 (0xE0).