RX-Drops on RB1100Dx4

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 ?
rb1100dx4 rx drop.png

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.
2.PNG
1.PNG

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,

good tip, thank you

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.