A difference on bandwidth entering and exiting a router

RouterOS General
1

Hi guys

In several routers that are working as PPPoE concentrators, with simple queues created automatically, I see a difference on bandwidth consumption between the upstream and the downstream
bandwidth.jpg
If you see in the screenshot the rx od sfpplus1 is 1970Mbps but the tx of sfpplus2 is 1731.6Mbps. That router has all the PPPoE connections in the sfpplus2. And no other interfaces are using bandwidth. Such difference is hapening in a lot of routers with the same setup.

I think that this may have something to do with the queues because the router that is up one level, that is not doing shaping but just NAT, has all the values exact. (check photo down under)
bandwidth2.jpg

2

If router in question is doing queueing/shaping, then yes, some fraction of ingress traffic gets dropped … that’s the way traffic shaping works (actually that’s the second stage which kicks in if first stage - delaying - doesn’t slow down traffic enough).

3

Yeah. That’s what i thought mkx. It makes sense once you think carefully about it and keep in mind how the queues work.

thanks m8