User's Manual Part 2

Appendix J: Operating Statistics
APCD-LM043-8.0 (DRAFT C) 285
Notes:
•A
packet is the basic unit of transmission. A packet may or may not contain a payload.
A
payload is user data, which may be an Ethernet frame or a logical link layer control
message.
• WEP is not supported in this release.
• The CCU maintains a transmit queue for each EUM. The length of this queue is
limited, to keep one EUM from consuming all the resources and impacting other
EUMs. Discards indicate excessive load by one EUM, possibly due to large TCP
windows.
• Registration occurs once per EUM and/or CCU boot time. Deregistration may occur if
an EUM is not authorized (a registration/deregistration request pair occurs periodically
restarts Number of times that a PAI (physical attachment
interface) state machine restart occurred (internal
error).
registrationRequests At the CCU, the number of registration requests
received (see note 5). At the EUM, the number of
registration requests transmitted (see note 5).
registrationResponses At the CCU, the number of registration responses
transmitted (see note 5). At the EUM, the number of
registration responses received (see note 5).
deregistrationRequests At the CCU, the number of deregistration requests
transmitted (see note 5). At the EUM, the number of
deregistration requests received (see note 5).
deregistrationInits Number of times no response was received from an
EUM, after multiple polls (see note 5). [CCU only]
disassociationRequests At the CCU, the number of disassociation requests
transmitted (see note 6). At the EUM, the number of
disassociation requests received (see note 6).
disassociationInits Number of times the CCU has determined than an
EUM should be
disassociated (see note 6). [CCU only]
newAssociations At the CCU, the number of times a new association is
created (see note 6). At the EUM, the number of
transitions to
associated state (see note 6).
currentAssociations Number of EUMs currently associated + 1 (see note
6). The one additional association is for “broadcast”.
[CCU only]
unexpectedEvents Number of internal unexpected events.
txDescAvail Indicates the instantaneous number of transmit buffers
that are not in use.
lastQueueTooLongEUM Indicates for which EUM the last packet was
discarded.
Statistic Description