User's Manual

11 Monitoring the Network
128 APCD-LM043-4.0
Examining this statistic in more detail, txPayloads includes
• Tx Data Payloads which, in turn, includes
• data coming from the Ethernet port of the CCU (either end-user data or
operator monitoring [SNMP] data),
• data coming from EUM-originated data payloads that have been “switched” to
the CCU radio port (for transmission to other EUMs), and
• broadcast data to all EUMs(TxPayloadsBCast).
NOTE: The Tx Data Payloads described above are both transmitted
during specific EUM poll periods.
• Tx Ctrl Payloads — Control data generated in the CCU, and used to configure, or
request status from, the EUMs. Tx Ctrl Payloads are transmitted during specific EUM
poll periods.
• Retransmitted data — Data that is not acknowledged after a transmission and is
assumed to be lost or corrupted.
Understanding the relationship between these values helps you monitor the integrity of a CCU
radio environment.
All non-broadcast payloads (hence, “directed” payloads) are explicitly acknowledged by the
EUMs. For these payloads, the result of a transmission during an EUM poll cycle will be one of
the following:
Table 26 Possible Transmission Outcomes
To put these values in perspective, the following samples have been taken from a live CCU,
using the <stats mac> CLI command:
Result of Transmission Reported Statistic
Payload is delivered to an EUM and
acknowledged on the first poll.
txPayloads1Ok
Payload is transmitted twice, after which an
acknowledgement is received.
txPayloads2Ok
Payload is transmitted three times, after
which an acknowledgement is received.
txPayloads3Ok
Payload is transmitted four times, after
which an acknowledgement is received.
rxPayloads4Ok
No acknowledgement received after four
transmissions, and the payload is
discarded.
txPayloadsFailRetry
Payload is not transmitted at all. txPayloadsFailAssocDeleted