User's Manual Part 2

Appendix I: SNMP MIB Definitions
APCD-LM043-8.0 (DRAFT C) 263
• The CCU maintains a transmit queue for each EUM. The length of this queue is
limited, to prevent one EUM from consuming all the resources and impacting service
to 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
while that EUM is powered ON) or if the EUM does not respond to multiple
consecutive polls, such as when it is powered OFF.
• Association occurs when there is traffic to send to or from an EUM. Disassociation
occurs if there is no traffic to or from an EUM for a short period of time.
CCU Ethernet Statistics Group
All CCU Ethernet Statistics Group MIB values are read only. All values in Table 66 are
prefixed with 1.3.6.1.4.1.2979.11.4.
Table 66 WaveRider CCU Ethernet Statistics Group MIB
MIB Name OID Value Type Description
ccuEtherInterrupts 1 Counter Total number of interrupts received by the Ethernet
driver ISR, interrupt service routine.
ccuEtherRxInterrupt 2 Counter Number of
receive complete interrupts received by
the Ethernet driver ISR.
ccuEtherRxOverrunInterrupt 3 Counter Number of
overrun interrupts received by the
Ethernet driver ISR. An overrun occurs when a
received packet has exceeded the packet size, or
the processor has missed one or more packets.
ccuEtherRxInProgressInterrupt 4 Counter Number of times a
receive complete interrupt was
received by the Ethernet driver ISR before the
current packet was finished.
ccuEtherTxCompleteInterrupt 5 Counter Number of normal transmit interrupts received by
the Ethernet driver ISR.
ccuEtherTxErrorInterrupt 6 Counter Number of
transmit error interrupts received by the
Ethernet driver ISR.
ccuEtherTxCarrierLostInterrupt 7 Counter Number of
transmit carrier lost interrupts received
by the Ethernet driver ISR.
ccuEtherTxAllocInterrupt 8 Counter Number of
transmit allocation complete interrupts
received by the Ethernet driver ISR.
ccuEtherTxEPHInterrupt 9 Counter Number of
transmit EPH interrupts (Ethernet
protocol handler interrupts) received by the
Ethernet driver ISR.
ccuEtherTxERCVInterrupts 10 Counter Number of
transmit ERCV interrupts (early receive
interrupts) received by the Ethernet driver ISR..
ccuEtherRxData 11 Counter Number of packets received and accepted by the IP
stack.
ccuEtherRxDataError 12 Counter Number of packets received and rejected by the IP
stack because of errors.