I'm trying to setup the following:
Switch 1 (ip 192.168.98.254) is a RB260GS connected to a SXT5ac on port1, port 2, 3 and 4 are untagged traffic that we want to separate
SXT5ac has an ip on vlan id 1
Switch 2 (ip 192.168.98.253) is a RB260GS connected to a SXT5ac (linked to the first one) on port 1, a QRT5 on port 2 and vlan tagged traffic 121 on port 3
QRT has also an ip on vlan id 1
Switch 3 (ip 192.168.98.252) is a RB260GS connected to QRT5 (linked to the other QRT5), port 2 has vlan tagged traffic 123 on port 2, and vlan 122 and 1 on port 3 (only port 3 has access to management side)

I am having problems with the traffic on vlan 121 and 123
All the switches are on SwOs1.14
Ports 2,3,4 are access ports on switch 1 (Vlan 124, 122 and 123 respectively)
Port 1 on switch 1 is a trunk port (vlan 1, 124, 122 and 123)
vlan 1 is the management vlan


Port 1 (vlan 1, ,124, 122 and 123) and port 2 (vlan 1, 122 and 123) are trunk ports on switch 2
Port 3 is an access port untagged vlan 124 but it didn't work (many lost packets) so I used an RB750GL instead and kept the traffic tagged, created a vlan on the RB750GL now but I'm still having the same problem

Port 1 1 vlan(1,122 and 123) is a trunk port on switch 3
Port3 is connected to another RB750GL that has two vlans setup (1 and 122) this is the one with the least packets lost and is pretty stable
Port 2 is an access port for vlan 123

Please help I've tried everything