The ifstat command output displays several statistics when you use the command on the FAS250FAS270 network interfaces.
The following table describes the statistics in the RECEIVE section of the ifstat command output when you use the command on the FAS250FAS270 network interfaces.
| 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. |
| Discards/minute | Rate per minute of packets discarded due to unavailable resources. |
| Total frames | Total frames that are received on the interface. |
| Total bytes | Total bytes that are received on the interface. |
| Multi/broadcast | Total number of multicast or broadcast packets received. |
| Total discards | Total number of "No buffers" packets that were discarded even though no errors were detected. |
| No buffers | Number of times the driver could not allocate a buffer and a packet was dropped. This might happen when your storage system is very 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 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. |
| 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. |
| CRC errors | Number of packets received with bad CRC. |
| Length errors | Number of frames received by the MAC where the actual number of bytes received did not match the length given in the Ethernet header. |
| Code errors | The number of frames received by the MAC that had a code error signaled by the Physical (PHY) layer. |
| Dribble errors | The number of frames received by the MAC with an alignment error. This is not used for 1000Mb/s operation. |
The following table describes the statistics in the TRANSMIT section of the ifstat command output when you use the command on the FAS250FAS270 network interfaces.
| 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 per minute of packets discarded due to unavailable resources. |
| Total frames | Total frames that are transmitted on the interface. |
| Total bytes | Total bytes that are transmitted on the interface. |
| Multi/broadcast | Total number of multicast or broadcast packets transmitted. |
| Total discards | Total number of packets that were discarded even though no errors were detected. This number is a sum of the "No buffers" and "Queue overflow" statistics. |
| Queue overflow | Number of outgoing packets dropped because the driver's queue was full. It might indicate a system problem. |
| No buffers | Number of times the driver fail to allocate a buffer for the transmit packet. |
| CRC errors | Number of packets transmitted by the MAC with CRC errors. This can happen only when the MAC is not appending the CRC to the transmitted packets. |
| Abort errors | Number of packets aborted during transmission. This could be because of a FIFO underrun. |
| Runt frames | Number of packets smaller than the minimum frame size (64 bytes) transmitted by the MAC. |
| Long frames | Number of packets larger than the maximum frame size transmitted by the MAC. |
| Single collision | Number of frames that encountered exactly one collision. Only valid in half-duplex mode. |
| Late collisions | Number of collisions that occurred outside the collision window. Only valid in half-duplex mode. |
| Deferred | Number of times a packet was aborted by the MAC due to excessive collisions during transmission. If 16 consecutive collisions occur during transmission of a packet, the transmission is deferred and MAC aborts the packet. |
The following table describes the statistics in the LINK INFO section of the ifstat command output when you use the command on the FAS250FAS270 network interfaces.