Greetings,
i noticed a lot of rx-drops on some interfaces on my routerboard 1100Dx4.
this board is running ospf, about 370 pppoe sessions RouterOs and firmware v6.42.1
cpu load under 30%(default clock) interfaces running with only-hardware-only queue type
traffic between 70Mbps and 400Mbps (rx-drops increase with higher traffic)
The eth1 is connected to a mimosa device
the others eth to mikrotik devices
its the only routerboard on my network with rx-drops (on the rx-tab btw)
can it be a hardware issue ?

I was able to reduce the rx-drop over 90%!! by disabling the SNMP service!!
wtf
I had a similar problem, but with an RB1100AHx2. In the end I disabled the auto negotiating, and set it to 100Mbps (the speed of the other device). Zero drops. Enabling auto detect, I got something like 5% drops.
Worth a try.
Same here. When turn off SNMP Rx drops disappear or are insignificant.


Rx drops in RouterBOARD 1100Dx4 Dude edition-SUP-74316
I received a mail regarding with the following content:
Jānis B.2 days ago 3:05 PM
Hello,
Rx-drops and Tx-queue-drops in the Interface menu indicate that default interface queue size is too small for the current application with VLAN other sub-interfaces. You should adjust interface queues to prevent it.
/queue type set ethernet-default pfifo-limit=300
/queue interface set [find where queue!=no-queue] queue=ethernet-default
Regards,
Thanks for the tip, have adjusted it, looking forward on the outcome.
Is there an improvement after the changes made?
It did not solve my problem.