High "Rx Over" Error on a Port

[Bnoba_CEO]

Hi,

I have a port on a switch that is not congesting and the utilization is lower than 20 percent. Yet, Rx over error is so much - can run into millions in minutes:

Port Link Rx Rx Rx Rx Rx Rx Rx
State Crc Over Under Frag Jabber Align Lost
================================================================================
Port> A 0 9757092 0 0 0 0 0
================================================================================

Any advise please.

[Naresh]

Hi Bnoba,
Did you tired changing the cable and SFP if connected to the port?
If not, please swap the cable and the SFP if connected to the port and check if you area still seeing the RX CRC errors.

[Bnoba_CEO]

Hi Naresh,

Thanks. I would explore this option.

[Ash_Curtis]

Is the neighbouring device sending jumbo frames? If it is, and jumbo frames are not enabled on the receiving port, you will see Rx Over incrementing in this way.

This article from our KB explains how to enable jumbo frames and configure the MTU size in EXOS:

https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-enable-jumbo-frames

[BradP]

Might want to try configuring to 9216 instead of 9000.