Rockwell Automation 1757-FFLDC4 FOUNDATION Fieldbus System User Manual - Manual (Page 131)

Rockwell Automation Publication 1757-UM012A-EN-P - July 2011 131
Diagnostic Web Pages Chapter 9
Table 11 - Ethernet Statistics Page
Field Description
Ethernet Link
Speed Indicates if the Ethernet port is operating at 10 Mbps or 100 Mbps
Interface Counters
In Octets Octets received on the Ethernet interface
In Ucast Packets Unicast packets received on the Ethernet interface
In NUcast Packets Non-unicast packets received on the Ethernet interface
In Discards Inbound packets received on the Ethernet interface but discarded
In Errors Inbound packets that contain errors (does not include In Discards)
In Unknown Protos Inbound packets with unknown protocol
Out Octets Octets sent on the Ethernet interface
Out Ucast Packets Unicast packets sent on the Ethernet interface
Out NUcast Packets Non-unicast packets sent on the Ethernet interface
Out Discards Outbound packets discarded
Out Errors Outbound packets that contain errors
Media Counters
Alignment Errors Frames received that are not an integral number of octets in length
FCS Errors Frames received that do not pass the FCS check
Single Collisions Successfully transmitted frames that experienced exactly one collision
Multiple Collisions Successfully transmitted frames that experienced more than one collision
SQE Test Errors Number of times SQE test error message is generated
Deferred Transmissions Frames for which first transmission attempt is delayed because the medium is busy
Late Collisions Number of times a collision is detected later than 512 bit-times into the transmission of a packet
Excessive Collisions Frames for which transmission fails due to excessive collisions
MAC Transmit Errors Frames for which transmission fails due to an internal MAC sublayer transmit error
Carrier Sense Errors Times that the carrier sense condition was lost or never asserted when attempting to transmit a frame
Frame Too Long Frames received that exceed the maximum permitted frame size
MAC Receive Errors Frames for which reception on the Ethernet interface failed due to an internal MAC sublayer receive
error