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)
Sample A:
X1-SC1 - rx_errors: 40295972
X1-SC2 - rx_errors: 20631597
X2-SC1 - rx_errors: 20516698
X2-SC2 - rx_errors: 40680283
Sample B:
X1-SC1 - rx_errors: 40295976
X1-SC2 - rx_errors: 20631601
X2-SC1 - rx_errors: 20516702
X2-SC2 - rx_errors: 40680287
Sample C:
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
rx_crc_errors: 0
rx_missed_errors: 0
tx_aborted_errors: 0
tx_carrier_errors: 0
tx_window_errors: 0
rx_long_length_errors: 40329872
rx_short_length_errors: 0
rx_align_errors: 0
rx_errors: 40329872
tx_errors: 0
rx_length_errors: 40329872
rx_over_errors: 0
rx_frame_errors: 0
rx_fifo_errors: 0
tx_fifo_errors: 0
tx_heartbeat_errors: 0
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?
Ethernet3/13 is up
admin state is up, Dedicated Interface
Hardware: 10/100/1000 Ethernet, address: 0026.0b3c.a694 (bia 0026.0b3c.a694)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec <<<<<<<<<<<<<<<<<
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, medium is broadcast
Port mode is access
full-duplex, 1000 Mb/s
Beacon is turned off
Auto-Negotiation is turned on
Input flow-control is off, output flow-control is off
Auto-mdix is turned on
Switchport monitor is off
EtherType is 0x8100
EEE (efficient-ethernet) : n/a
Last link flapped 02:38:38
Last clearing of "show interface" counters 01:16:59
0 interface resets
30 seconds input rate 173120 bits/sec, 118 packets/sec
30 seconds output rate 1446712 bits/sec, 180 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 114.74 Kbps, 17 pps; output rate 1.00 Mbps, 45 pps
RX
470117 unicast packets 0 multicast packets 190 broadcast packets
470307 input packets 76575515 bytes
0 jumbo packets 0 storm suppression packets
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
617354 unicast packets 14717 multicast packets 59151 broadcast packets
691222 output packets 670388018 bytes
2304 jumbo packets <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
0 output error 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
Any feedback thoughts would be gratefully received.
