The issue is most likely the config on the sub interfaces on R3 and the switchport on SW2 that R3 connects to. If SW3, R1 and R2 are in differenet VLANS that one of the sub-interfaces on R3, the the switchport needs to be a trunk, and the sub-interfaces on R3 will need to encasulate the traffic into Dot1Q with the correct VLAN tag.
This is an assumption, as I have no idea what the end task is.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...