Health check packet DSCP marker support

SD-WAN health check probe packets support Differentiated Services Code Point (DSCP) markers for accurate evaluation of the link performance for high priority applications by upstream devices.

When the SD-WAN health check packet is sent out, the DSCP can be set with a CLI command.

To mark health-check packets with DSCP:

config system sdwan

config health-check

edit <name>

set diffservcode <6 bits binary, range 000000-111111>