Regarding downstream speed for master-port (or event better for all ports) changing interface queue from only-hardware-queue to ethernet-default.
It should improve download speed (200Mbps should be reached without issue).
Can I add to this thread, regarding CRS112-8G-4S which I recently purchased?
It was Ros 6.29 and I found it has troubles with downstream at my home, that was only about 20 to 40 Mbit by ISP..
but after "upgrade" from RB951g to CRS112 it dropped to just only 8Mbit.. CPU load 80+% while testing..
Changed Queues to Ethernet-default but seemed to make no difference. Upgraded to 6.32 no change.
So after reading this thread I managed to netinstall Ros 6.15 to it, downloaded from some archives..
( but beware - it said it has no license then, and will stop after 24 hours!!!
I happily had its license key saved and it seem to accepted it).
Anyway, CPU load went down, both iddle and while testing, and it seem to work well with 6.15.
It has even weaker CPU than CRS109. Oh, that was a surprise, it seem weaker than $15 hAP lite.. Why that is?
I did not notice that (expected that it will be same as CRS109),
but even if I would see 400MHz, I would expect it is just a different kind of CPU and will suffice..
I found soon that it can not even support Bond interfaces by CPU (iperf of 2x gigabit bond resulted in 360Mbit..).
What a shame.. Well it support Trunk by switch chip, but it is not the same I guess (LACP..).
May I ask for some guess whether it should be able to support 40Mbit download, with very basic NAT and firewall?
I can not be sure for now whot is limitting my bandwidth, it may be ISP.
I should update, that after recovering my ISP access, I have around the same bandwidth as before
(when i was usng RB851g, the same cpu as RB2011), which is up to 40Mbit download.
No problems so far, at all, using Routeros 6.15 on CRS112-8G-4S.
I noticed that IRQ in resources is dramatically lower than it was with 6.29 and 6.32 Routeros.
Tried also NAT and it seems to hold on at above gigabit (1.3Gigabit using trunk-trunk pcs just different ip subnets).
So the 400MHz mips 24kc v8.5 CPU is not that weak as I was afraid of ( when I initially saw 360Mbit instead of 2Gbit and 100% load - had Bonding set in Interfaces, not Trunk set in Switch.
This way it is a great device, note that I want to have optically isolated in/out paths and rb260 is great (including price).
btw, cable TV passes through VLAN like a charm so metallic wires end in rb260 right at the door.
I stay tuned because I think that low performance/high load is just a bug and will be sorted off some time.