Chapter 4 Troubleshooting and Diagnostics IPmux-1/1E Installation and Operation Manual
4-18 Performance Monitoring and Troubleshooting Statistics
Table 4-5. 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
Total Frames The total number of correct frames received. When a valid connection is established the number should increase steadily.
Total Octets The total number of octet s (bytes) received. When a valid connection is established the number should increase steadily.
Oversize
Frames
Number of frames exceeding the maximum allowed frame size, but are otherwise valid Ethernet frames (good CRC).
Fragments The number of frames that are shorter than 64 bytes and have an invalid CRC.
Jabber The number of frames that are too long and have an invalid CRC.
A jabber is transmission by a data station beyond the time interval allowed by the protocol, usually affecting the rest of the network. In an Ethernet network,
devices compete for use of the line, attempting to send a signal and then retrying in the event that someone else tried at the same time. A jabber can look like
a device that is always sending, effectively bringing the network to a halt.
Recommendations
Check network interface card or any other transmitting devices and external electrical interference.
Dropped
Frames
Number of dropped frames due to delivery problems.
Recommendations:
Check the network interface card.
CRC Errors The amount of frames with invalid CRCs.