Can anyone please explain to me what the marked RX and TX statistics represent on the attached screen capture? Are they packet sizes? Speed buckets?
Thanks you,
John L.

Can anyone please explain to me what the marked RX and TX statistics represent on the attached screen capture? Are they packet sizes? Speed buckets?
Thanks you,
John L.

That is the number of packets within each size range.
Curious what type of switch that was and what version of SwitchOS that is from. I had to look at my RB260 with SwOS 1.16 to see that layout of that page.
Thanks Jim!
My bad for failing to mention both the device model and firmware version…
It’s an RB260GS (CSS106-5G-1S) switch running SwOS v2.13.
John L.
AA7US
After I posted my reply, I realized my CSS106-5G-1S also looks like that. I had originally looked at my CSS326 switches.
I find this to be useful information. Note that these can overflow. I the cases you posted, if you add all the numbers in the red boxes, you will see they add to total packets. Also if you add unicast, broadcast, and multicast, you will also get total.
On my CSS106-5G-1S they don’t always add up exactly, especially when I am pushing things in a lab environment. But they are still close.
And I don’t think I have tried with 2.13
The last time it really played with the details was when I was kicking the tires after I bought my first CSS106-5G-1S (I had an RB250 before, and liked it, so I bought a CSS106-5G-1S, and since then a second one. They make really nice network taps.
http://forum.mikrotik.com/t/css106-5g-1s-v2-8-bogus-tx-and-rx-unicast-counter-with-bit-32-set/123196/1 where I reported erroneous counters, but that was fixed, I got a prelim fix, and it was officially fixed in v2.09
If you find a bug and can create a reproducer, your chances of getting a fix are much higher. And that makes sense, fixing an intermittent problem without any clue as to what triggers it, makes finding the problem is almost impossible. And you can only fix what you can find the cause of.
For a small switch, I like the RB260GS. My first one was the original model and does not support 2.x firmware. It’s sitting in an enclosure in my front yard, and normally only has a couple ports in use. When I needed another one, it was the newer CSS106-5G-1S version and is in my attic. It also normally only has a couple ports in use, but for Christmas, it gets a couple more. Recently I bought a CSS106-1G-4P-2S (the POE version) because I needed to power some WiFi related stuff at another location. Both of the CSS106, and my CSS326 switches are running 2.13. All three are used for multiple VLANs.