IBM 8260 Drop Event, MAC Octet, MAC Packet, Ring Purge Event, Ring Purge Packet, Beacon Event

Here is a list of MAC statistics available under this group and their respective descriptions:

Drop Event	The number of events in which MAC packets were
	dropped by the probe due to unavailability of
	resources on the probe itself. It doesn′t represent the
	number of packets dropped but the number of times
	this condition was detected. If the drop events counter
	constantly increments, it is an indication that there is
	more activity on the segment than can be captured by
	the network probe. You may want to consider
	increasing the resources on your network probe. For
	instance, if you are running the RMON application on
	a workstation, you may want to allocate more real
	memory and disk space to the RMON application. If
	you are running an RMON subset on a bridge, router,
	or hub, you might want to consider offloading the task
	to an external monitoring device.
MAC Octet	The number of octets of data in MAC packets
	(excluding bad frames) received on the network
	(including the FCS octets but excluding the framing
	bits). An octet represents an integral collection of
	eight bits of information.
MAC Packet	The number of MAC packets received. This excludes
	packets that were not good frames.
Ring Purge Event	A ring purge event refers to one of the following
	occurrences:

∙

∙

Completion of the token-claiming process

Detection of a token error such as a lost frame or token, a circulating frame, or a circulating priority token

	The probe will count the number of times the ring
	enters the ring purge state from normal ring state. It
	doesn′t include a ring purge state that comes in
	response to the claim token or beacon state.
	Errors caused by adapter insert/removal can also
	trigger a ring purge. Adapter insert/removal
	operations are normally encountered in the morning
	when employees power-on their PCs to access the
	LAN and when they power-off their PCs in the evening.
	A baseline should be set to ignore high counts of ring
	purges during hours when PCs are being
	powered-on/off.
Ring Purge Packet	A Ring Purge MAC frame/packet is sent by the active
	monitor to all ring stations informing them about the
	occurrence of a ring purge event.
Beacon Event	This counter keeps track of beacon events. A beacon
	event occurs when the ring enters the beaconing state
	from a non-beaconing state. A beaconing state could
	result from:
	∙ Ring signal loss error

Chapter 10. 8260 RMON Support 203