Ethernet Controller II, III, and IV interface statistics

RECEIVE section statistics

The following table describes the statistics in the RECEIVE section of the ifstat command output when you use the command on Gigabit Ethernet Controllers II, III, IV, and V, both fiber and copper, as well as the onboard 10 Base-T/100 Base-TX Ethernet Controller IV.

Statistic	Meaning
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.
Total frames	Total frames that are received on the interface.
Total bytes	Total bytes that are received on the interface.
Total errors	Total errors that occur on the interface.
Multi/broadcast	Total number of multicast or broadcast packets received.
Alignment errors	Number of frames that are both misaligned and contain CRC errors.
Non-primary u/c	Number of Ethernet frames received for the partner's MAC address after a failover in a cluster configuration.
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	Packets with bad CRC.
Bad length	Total number of received packets with a bad length. These are frames counted as undersize, fragment, oversize, or jabber.
Runt frames	Number of received frames that were less than the minimum size (64 bytes) and had a valid CRC.
Fragment	Number of received frames that were less than the minimum size and had a bad CRC.
Long frames	Number of received frames that were greater than the maximum size and had a valid CRC.
Jabber	Number of received frames that were greater than the maximum size and had a bad CRC.
Bus overruns	Number of times the adapter's receive FIFO overflowed and a packet was dropped. This occurs when the bus is very busy and the adapter cannot transfer data into host memory. This might also occur when the filer CPU is very busy and cannot process the received packets fast enough.
Queue overflows	Number of frames dropped on receive due to the driver receive queue overflowing.
No buffer	Number of times the driver could not allocate a buffer and a packet was dropped. This might happen when the filer is very busy. If the count increases continually, it might indicate that a software component is not returning buffers.
Xon	Number of XON frames received when receive or full flow control is enabled.
Xoff	Number of XOFF frames received when receive or full flow control is enabled.
Jumbo	Number of good packets received that were larger than the standard Ethernet packet size when jumbo frames are enabled.
Reset	Number of times the driver reset the NIC because the NIC was in a bad state.
Reset1	Number of times the driver reset the NIC because the NIC was in a bad state.

TRANSMIT section statistics

The following table describes the statistics in the TRANSMIT section of the ifstat command output when you use the command on Gigabit Ethernet Controllers II, III, IV, and V, both fiber and copper, as well as the onboard 10 Base-T/100 Base-TX Ethernet Controller IV.

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.
Total frames	Total frames that are transmitted on the interface.
Total bytes	Total bytes that are transmitted on the interface.
Total errors	Total errors that occur on the interface.
Multi/broadcast	Total number of multicast or broadcast packets transmitted.
Queue overflow	Number of outgoing packets dropped because the driver's queue was full. It might indicate a system problem.
Max collisions	Number of frames that were not transmitted because they encountered the maximum number of allowed collisions. Only valid in half-duplex mode.
Single collision	Number of frames that encountered exactly one collision. Only valid in half-duplex mode.
Multi collisions	Number of frames that encountered more than one collision, but less than the maximum allowed. Only valid in half-duplex mode.
Late collisions	Number of collisions that occurred outside the collision window. Only valid in half-duplex mode.
Xon	Number of XON frames transmitted when send or full flow control is enabled.
Xoff	Number of XOFF frames transmitted when send or full flow control is enabled.
Timeout	Number of times the adapter's transmitter hung and the adapter had to be reset. This can happen when the cable is pulled and the transmitter cannot transmit a packet. The adapter is reset to reclaim packet buffers.
Jumbo	Number of packets transmitted that were larger than the standard Ethernet packet size when jumbo frames are enabled.

LINK INFO section statistics

The following table describes the statistics in the LINK INFO section of the ifstat command output when you use the command on Gigabit Ethernet Controller II and III interfaces and 100 Base-T/1000 Base-T Ethernet III interfaces.

Statistic	Meaning
Current state	Current state of the interface: up or down--The state of the link. cfg_down--The interface is configured down. enabling--The interface is coming up.
Up to downs	Number of times the link toggled between up and down.
Auto	Operational state of autonegotiation: on--Autonegotiation is enabled and succeeded. off--Autonegotiation failed. This happens when the device to which the interface is connected has disabled autonegotiation or is incompatible with the interface. This may also indicate that the interface is down.
Speed	Speed of link negotiated or set.
Duplex	Duplex of the link negotiated or set.
Flow control	The operations flow control setting. For information on how the operational flow control setting is determined, see Chapter 1, Network Interface Configuration.