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Statistics for Dual 10G Ethernet Controller CNA - SFP+

The ifstat command output displays several statistics when you use the command for the Dual 10G Ethernet controllers.

RECEIVE section statistics

The following table describes the statistics in the RECEIVE section of the ifstat command output:

Statistic Definition
Frames/second
Rate of received frames per second.
Bytes/second
Rate of received bytes per second.
Errors/minute
Rate of errors (which led to frames being lost) per minute.
Discards/minute
Rate of packets discarded per minute due to unavailable resources.
Total frames
Total frames received by the interface.
Total bytes
Total bytes received by the interface.
Total errors
Total errors that occur on the interface.
Total discards
Total number of packets that were discarded in spite of undetected errors. This number is a sum of the "No buffers", "Bus overruns", and "Queue overflows" statistics.
Multi/broadcast
Total number of multicast or broadcast packets received.
No buffers
Number of times the driver could not allocate a buffer and a packet was dropped. This might occur when your storage system is busy. If the count increases continually, it might indicate that a software component is not returning buffers.
Non-primary u/c
Number of Ethernet frames received for the partner's MAC address after a failover in an HA pair.
Tag drop
Number of tagged frames dropped on an interface that is not configured to support VLAN tagging.
Vlan tag drop
Number of tagged frames dropped that do not match the VLAN tags configured on the interface.
Vlan untag drop
Number of untagged frames dropped on an interface that is configured to be part of a VLAN.
CRC errors
Number of packets received with bad CRC.
Alignment errors
Number of frames that are both misaligned and contain CRC errors.
Runt frames
Number of received frames that were less than the minimum size (64 bytes) and had a valid CRC.
Long frames
Number of received frames that were greater than the maximum size and had a valid CRC.
Code error
Number of received packets/ frames with code errors.
Preamble error
Number of received packets/ frames with preamble errors.
Frame length error
Number of received frames with frame length errors.
Received VLAN frames
Number of received VLAN frames.

TRANSMIT section statistics

The following table describes the statistics in the TRANSMIT section of the ifstat command output:

Statistic Meaning
Frames/second
Rate of transmitted frames per second.
Bytes/second
Rate of transmitted bytes per second.
Errors/minute
Rate of errors (which led to frames being lost) per minute.
Discards/minute
Rate of packets discarded per minute due to unavailable resources.
Total frames
Total frames that were transmitted on the interface.
Total bytes
Total bytes that were transmitted on the interface.
Total errors
Total errors that occur on the interface.
Total discards
Total number of discarded packets even though no errors were detected. This number is a sum of the "No buffers" and "Queue overflows" statistics.
Multi/broadcast
Total number of multicast or broadcast packets transmitted.
No buffers
Number of times the driver failed to allocate a buffer for the transmit packet.
Queue overflows
Number of outgoing packets dropped because the driver's queue was full. It might indicate a system problem.
Backplane error
Number of PCI backplane errors detected.
Padded sent
Number of 16-60 byte frames, padded and sent.
Too long frames
Number of frames that were too long but were sent anyway.
Too short frames
Number of frames that were too short and illegal and were not sent.
Unmatched length
Total descriptor length that does not match transfer length.

LINK INFO section statistics

The following table describes the statistics in the LINK INFO section of the ifstat command output:

Statistic Meaning
Current state
Current state of the interface:
  • up or down—The state of the link.
  • cfg_down—The interface is configured to the down status.
  • enabling—The interface is moving to the up status.
Up to downs
Number of times the link is switched between the up status and the down status.
Speed
Speed of link negotiated or set.
Duplex
Duplex of the link negotiated or set.
Flow control
The configured flow control setting, as flow control is not autonegotiated on this interface.