RAD Data comm IPmux-11 operation manual LAN Statistics LAN Statistics Parameters

Chapter 6 Troubleshooting and Diagnostics		Installation and Operation Manual
Monitoring>Statistics>Bridge
Channel	> (User1-Eth2)
Frames Received		Frames Transmitted
Total Frames:	(0)	Correct Frames:	(0)
Total Octets:	(0)	Correct Octets:	(0)
Oversize Frames	(0)	Collisions:	(0)
Fragments:	(0)
Jabber:	(0)
Dropped Frames:	(0)
CRC Errors:	(0)

>
F - forward; R - reset counters	1 Mngr/s
ESC-prev.menu; !-main menu; &-exit

Figure 6-2. LAN Statistics

Table 6-2. LAN Statistics Parameters

Parameter Description

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 octets (bytes) received. When a valid connection is established the number should
	increase steadily.
Oversize	Number of frames exceeding the maximum allowed frame size, but are otherwise valid Ethernet frames
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	Number of dropped frames due to delivery problems.
Frames	Recommendations:
	Check the network interface card.
CRC Errors	The amount of frames with invalid CRCs.
Frames Transmitted
Correct Frames	The number of frames successfully transmitted. When a valid connection is established the number
	should increase steadily.
Correct Octets	The number of octets successfully transmitted. When a valid connection is established the number
	should increase steadily.
Collisions	The number of successfully transmitted frames which transmission is inhibited by a collision event. A
	collision occurs in half-duplex connection when two devices try to transmit at the same time. This
	counter tracks the number of times frames have collided. This event exists only in half duplex mode,
	which is not recommended in an IPmux-11 application.

Recommendations:

Many collisions indicate that the traffic is too heavy for a half duplex media. Set to a full duplex environment if possible.

6-6 Monitoring Performance IPmux-11 Ver. 2.00