I can't imagine the RB2011 couldn't handle this data-streams and the SG105E could. (there for in the old setup the RB2011 works fine) I want to use the RB2011 as a simple managed switch, so I don't have to throw them away.
Why are you using the 100Mbps ports on the RB2011 instead of the 1Gbps ether1-ether5 as you stated in the original post?
How are you testing?
The diagram helps us understand what your layout is, but tells us nothing about your test points, or how the RB5009 is configured. But since you said that an SG105E "smart" switch worked well, the RB5009 is probably configured in a way that works with it.
The only MikroTik routers I own both have a single switch chip (RB760iGS (hEX S), and the RB5009), so any info I give you about the RB2011 is not first hand, it is only from reading. But my understanding is that you should not use more bridges than switches if you want hardware switching to occur. And all ports connected to a vlan must be on the same switch (in other words their must be a direct path between the all ports in a vlan on the same switch in the router, i.e. "through the CPU" will kill the ability to handle in the switch ASIC). By introducing a second bridge on the same switch ASIC you are forcing the CPU to be involved. For routed traffic, that makes little difference, because the CPU will already be involved, but for switched layers 2 traffic, the traffic never needs to go through the CPU, and forcing it through the CPU will slow things down.
I know what I would do in your situation. I would buy another switch (but probably an 8 port, since they are only a few dollars more). And I would use the RB2011 as a lab router/backup router. Or sell it. But you should be able to get it to work as two independent switches, one 5 port GB switch and one 5 port 100Mbs switch, and they should perform ok.
RB2011 series Atheros8327 (ether1-ether5+sfp1); Atheros8227 (ether6-ether10) from
Switch Chip Features - Introduction
The Atheros switch ASICS have some quirks and at least some of the 100Mb ASICs have problems with hybrid trunks (where one vlan is untagged on the "trunk" link and also on another access port). And there is this warning in the
Host Table section.
bridging all HW or None.png
Also read the
CPU Flow Control section. If you used the 1Gb switch (ether1-ether5) the need for any pause frames would be reduced. But I would really only expect those to show up when downloading a file from the NAS to the PC connected to the RB2011.
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