Ethernet Port Diagnostics
(Original Document)
About us
Introduction
Use the Ethernet Diagnostic page to display data for the communication module’s Ethernet port that is either:
Use the Refresh Every 500ms checkbox to display static or dynamic data, as follows:
When the checkbox is...
This page...
Selected
  • Displays data that is dynamically updated every 500 ms, and
  • Increments the number at the top of the table each time data is refreshed
De-selected
  • Displays static data, and
  • Does not Increment the number at the top of the table, which instead displays a constant value
NOTE: Before you can open the Diagnostic window, connect the DTM for the target communication module to the physical module itself. To do this, select the module node in the DTM Browser, then select Edit → Connect.
The Ethernet Diagnostic page looks like this:
To open this page:
Step
Action
1
In the DTM Browser, select the communication module and click the right mouse button. A pop-up menu opens.
2
In the menu, select Device menu → Diagnostic.
3
In the left pane of the Diagnostic window, select the communication module node.
4
Click on the Ethernet Diagnostic tab to open that page.
Ethernet Diagnostic Parameters
The Ethernet Diagnostic page displays the following parameters for the communication module’s single Ethernet port:
Parameter
Description
General parameters:
Interface Speed
Valid values include: 0, 10, 100 Mbits/second
Interface Flags
Bit 0—Link Status: 0 = Inactive; 1 = Active
Bit 1—Duplex Mode (see below)
Bits 2...4—Negotiation Status (see below)
Bit 5—Manual Setting Requires Reset (see below)
Bit 6—Local Hardware Fault (see below)
Duplex Mode
0 = half duplex; 1 = full duplex
Negotiation Status
3 = successfully negotiated speed and duplex
4 = forced speed and link
Manual Setting Requires Reset
0 = automatic; 1 = device requires reset
Local Hardware Fault
0 = no event; 1 = event detected
Physical Address
Module MAC Address
Input parameters:
Octets
Octets received on the interface
Unicast Packets
Unicast packets received on the interface
Non-Unicast Packets
Non-unicast packets received on the interface
Discards
Inbound packets received on the interface, but discarded
Errors
Inbound packets that contain detected errors (excludes In Discards)
Unknown Protocols
Inbound packets with unknown protocol
Output parameters:
Octets
Octets received on the interface
Unicast Packets
Unicast packets received on the interface
Non-Unicast Packets
Non-unicast packets received on the interface
Discards
Inbound packets received on the interface, but discarded
Errors
Outbound packets that contain detected errors (excludes In Discards)
Unknown Protocols
Outbound packets with unknown protocol
Error counter parameters:
Alignment Errors
Frames 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 the SQE test error is detected
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 bittimes into the transmission of a packet
Excessive Collisions
Frames for which transmission does not succeed due to excessive collisions
MAC Transmit Errors
Frames for which transmission fails due to a detected internal MAC sublayer transmit error
Carrier Sense Errors
Times that the carrier sense condition was lost or not 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 an interface does not succeed due to a detected internal MAC sublayer receive error