Specifications

Chapter 4 Troubleshooting and Diagnostics IPmux-1/1E Installation and Operation Manual
4-12 Performance Monitoring and Troubleshooting Statistics
• Frames transmitted
 Correct Frames
 Correct Octets
 Single Collision
 Multi-Collision
 Deferred Transmission
 Late Collision
 Carrier Sense.
Table 4-4. LAN Statistics Parameters
Parameter Description
MAC
Address
MAC address of the local port.
Mode Port mode is set either manually or via the auto-negotiation mode (under LAN configuration
screen).
Note: When auto-negotiation protocols do not support each other, this will degrade the
connection to a half-duplex mode.
In order to avoid this, auto-negotiation should be disabled and the ports should be
configured/forced manually. Half-duplex degradation will occur also when auto-negotiation is
enabled at one port and disabled at the opposite port.
Rate (Mbps) Port rate is set either manually or via the auto negotiation mode.
Status Link status: Connected = Normal operation.
Not connected = Ethernet Link loss
Frames Received
Correct
Frames
The number of frames successfully received. When a valid connection is established the
number should increase steadily.
Correct
Octets
The number of octets successfully received. When a valid connection is established the
number should increase steadily.
Alignment
Errors
The number of frames received that are not an integral number of octets in length (RFC
1643). All frames should end on an 8-bit boundary, but physical problems on the network
could cause the number of bits to deviate from the multiple of eight.
Recommendations:
Check physical connections, devices and configuration.
FCS Errors Counts the number of frames received that do not pass the FCS check (RFC 1643). An FCS
check is a mathematical way to ensure that all the frame bits are correct without the system
having to examine each bit and compare it against the original.
Recommendations:
Check for physical problem such as hardware problem, or a bad line, or noisy environment.