Version of diffserv used in TL-SG108 V4

I have my own custom router for my ingress/egress that is using cake (sch_cake) for traffic-shapping and prioritizing traffic.

I'd like to make sure the prioritizing is using the same algorythm used by my bridge.

To do this, I need to understand what version of diffserv is used on the bridge, such that i can match that version in my router.