Avaya G250 Administration page 245

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An alternative tool available from Avaya for debugging QoS problems is VMON.
Note:
VMON is an RTCP QoS reports collector. VMON support, available in all Avaya
devices, is the capability of a VoIP device to send a copy of an RTCP message to
the IP address of a VMON server. VMON can collect RTCP reports, store them to
its host hard disk, and analyze and generate graphic reports. However, VMON
requires a dedicated Windows server. The RTP statistics application runs on the
G250/G350's firmware, and does not require any dedicated hardware. For
information about configuring VMON in Avaya Communication Manager, see
Administrator's Guide for Avaya Communication Manager, 555-233-506.
The RTP statistics application provides the following functionality:
Collects QoS data from the gateway VoIP engine(s), including Real-Time Control Protocol
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(RTCP) data and information from the DSP regarding jitter buffer, internal delays, and so
on.
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RTCP is a standard QoS report companion protocol to RTP. RTP endpoints
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periodically send RTCP report packets to their remote peer (or peers in
multicast). RTCP reports include QoS data such as delay, jitter, and loss.
Collects call data from the gateway, such as duration, start-time, and end-time.
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Displays the RTP statistics in CLI and MIB formats.
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Displays summary reports for the VoIP engine(s).
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Assesses QoS status based on configurable thresholds on an extensive set of QoS
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metrics.
Generates QoS traps. QoS traps are notifications sent via SNMP upon termination of an
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RTP stream that suffers from bad QoS. These notifications include extensive data about
the session that enables offline troubleshooting of QoS problems.The trap rate is
controlled by a configurable trap rate limiter.
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QoS trap generation is an especially convenient troubleshooting tool for large
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installations, since all devices that support the RTP statistics application can be
configured to send traps to a single SNMP trap manager.
Generates QoS fault and clear traps. QoS fault traps are notifications that are sent when
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more than a configurable number of active sessions have QoS indicators over the
configured thresholds. A QoS clear trap is a notification that is sent after a QoS fault trap
when the number of active RTP sessions with QoS indicators over the configured
thresholds reduces to a specified number.
Configuring and analyzing RTP statistics
Issue 1.1 June 2005 245