Hey Hey,

The RFC that you posted is for DSCP.... that's a method of setting the Quality of Service.... it doesn't necessily imply ToS routing.. it's entirely possible that Linux using IP Precedence for anything that's related to Linux QoS (what you call ToS Routing)... If not.. it's possible that it only uses DSCP and it's entirely possible that Linux is using IP Precedence... it may not even look at the fields that are being set. As for every packet setting itself to Interactive... I'm not sure you get it... The field sets priority (Best Effort, Less than Best Effort, Guaranteed, etc).

I'm also not sure why you think that every Windows packet sets it... Check the attached screenshot and you will see a Windows ICMP Echo and that the ToS field has a value of 0.

Peace,
HT