Continually increasing rx_errors rx_long_length_error - mtu 1500 on both sides
I have an interesting problem - I have a storage array that has 4 management ports that are connected to a Cisco Nexus 7k - the Array is getting upgraded soon and one of the pre-checks is to check for errors on the management interfaces as this is upgrade is passed to the storage controllers.
These samplings were taken at approximately 10 to 15 second intervals. (note the increase for each from Sample A to B to C - on all 4 Sample B is 2 more than Sample A - Sample C is 5 more than sample B)
X1-SC1 - rx_errors: 40295972
X1-SC2 - rx_errors: 20631597
X2-SC1 - rx_errors: 20516698
X2-SC2 - rx_errors: 40680283
X1-SC1 - rx_errors: 40295976
X1-SC2 - rx_errors: 20631601
X2-SC1 - rx_errors: 20516702
X2-SC2 - rx_errors: 40680287
X1-SC1 - rx_errors: 40295994
X1-SC2 - rx_errors: 20631619
X2-SC1 - rx_errors: 20516720
X2-SC2 - rx_errors: 40680305
A breakdown of the errors seems to indicate that the errors are all rx_long_length_errors
MTU is confirmed as 1500 on both sides and these errors are on the array side - there is nothing in-between - array connect directly to the 7k - there are 0 TX or RX errors on the Nexus side.
What I am curious about is
1) I thought rx_long_length_errors indicates a mismatched mtu - can this error indicate anything else?
2) If mtu is confirmed as 1500 on both sides is there any scenario that this would make sense to see these errors?
On a side note - I see mention of jumbo frames on the 7k side even though mtu is set at 1500 - does that make sense - my only thought is that these are historical and counters haven't been cleared - does this make sense to anyone?
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