The problem is that such heavily affected latency also affects tcp behaviour and web stops working well. I've also verified on RB side and the CPU is loaded 1-3% so this is not caused by CPU limitation. That's while I'm downloading something on machine connected to ether2 and while users connected to ether5 are basically idle and not downloading anything.
with limit set on ether2 to 64kbps tx/rx (to test) my pings to RB ar on 1000-2000ms and to Zyxel 1500-3000ms with limit set on ether2 to 512kbps tx/rx my pings to RB and Zyxel suddenly increase to 100-200ms without limit, let's say I ping RB2011 from machine connected to ether5 in 0.xxx ms. Why I'm limiting to this silly speed is that for now I do have only 2Mbit down/256kbps up link and I need to preserve some bandwidth to ether5 users. In interfaces I select interface from the table and then set preferred bandwith limit tx/rx from the drop-down list. The not so funny thing is that more I limit ether2/4 more I'm limited on ether5. When I do that my communication on ether5 is affected too. Now, I'd like to limit bandwidth available to ether2/4 to just 512kbps up/down. To ether5 I do have connected smc switch with other users. To RB2011L there are connected two users to ether2 and ether4. My setup is RB2011L sitting in DMZ of Zyxel ADSL modem. DATE CVE VULNERABILITY TITLE RISK : CVE-2020-20221: Resource Exhaustion vulnerability in Mikrotik Routeros Mikrotik RouterOs before 6.44.6 (long-term tree) suffers from an uncontrolled resource consumption vulnerability in the /nova/bin/cerm process. I've tried bandwith limits in past few days but always with the effect of affecting other communication too. Using RB2011L with latest update available to RouterOS.
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