Configuring Qos Traps - Avaya G250 Administration

Table 11: RTP statistics application configuration (continued)
Name
Clear
QoS Trap Rate
Limiter:
Token Interval
Bucket Size
Session Table:
Size
Reserved
Min Stat Win

Configuring QoS traps

You can configure the application to automatically generate QoS traps via SNMP at the
termination of RTP sessions that have QoS problems. SNMP traps are automatically sent to the
SNMP trap manager on the active Media Gateway Controller (MGC). You can also configure
SNMP traps to be sent to an external trap manager. The application generates a QoS trap
when, at the end of an RTP session, one or more event counters are over their event
thresholds. For example, if the event threshold for packet loss is 2, the application generates a
trap at the termination of any session in which packet-loss was sampled over its threshold twice
or more during the session.
Description
The QoS clear trap boundary. That is, the reduced number of active
sessions with QoS faults that triggers a QoS clear trap to be sent
after a QoS fault trap was sent.
The displayed token interval is in seconds. The maximum long term
trap rate, expressed as an interval in seconds. In the example shown,
the maximum long term trap rate is one trap every 10 seconds.
The maximum number of tokens stored in the token bucket of the trap
rate limiter. This item limits the size of a QoS trap burst.
The maximum number of RTP session entries held in the session
table in the gateway RAM.
The number of rows in the session table that are reserved for
sessions with QoS problems. In the example shown, the table size is
128 and the reserved number is 64. If, from 1000 sessions only 300
had QoS problems, the session table will hold, at least, the last 64
sessions that had QoS problems. Note that if the last 128 sessions all
had QoS problems, all rows in the session table will be filled with
sessions that had QoS problems.
The minimum statistic window configured for the RTP statistics
application. That is, the minimum number of observed RTP
sequence increments for which the application evaluates packet
loss.
Configuring and analyzing RTP statistics
Issue 1.1 June 2005
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