Routing Issue? Internal Bandwidth Issue?

RouterOS General
1

I’ve been unsuccessfully trying to diagnose a bandwidth issues - any input would be greatly appreciated!

I have several of these examples throughout my network…

Our whole network is routed 100% using a variety of mikrotik routers.

This example has one hop/trace route from core CCR. Customer --PTMP–> CCR ----licensed backhaul —> Core CCR— fiber.

OSPF routes are correct. Trace route shows the expected hops.

No active queues limiting bandwidth - verified.

Customer A runs a speed test at to speedtest.net - results come in at 40/20Mbs
I run a band width test from customer A’s mikrotik to our core CCR. Speed tests are similar to real life throughput. This does max out one cpu on the core CCR. CCR cpu usage still reports at 0-1%.

I run a bandwidth test from customer A’s mikrotik to the first hop. Customer A gets 80/40Mbs.

I run a bandwidth test from hop 1 (ccr) to core CCR - 350/350Mbs.

It seems somewhere we’re experiencing a bottle neck, but we can’t find it.

Thanks,
Paul

2

As far as I know, the CCR is using one core for all these tests…

3

I understand that one CPU is maxing out, however if “over the air” can hand 90mbs down and my backhaul infrastructure is more than sufficient - why do I not see those speeds to the Internet?

I’ve tried different flow control options - no difference.

I’ve read a lot on other forums about issues going from 1000full to 100full, however we have identical bottlenecks on a complete 1000full branch.
Any suggestions are appreciated!

4

Try run a btest to http://forum.mikrotik.com/t/public-mikrotik-bandwidth-test-server-s-now-shutdown-as-of-april-1st-2025/94863/61 from your central router and see what you get.
Please confirm how you are interconnecting between customer a and your core router.