Snmp; Packet Sniffing; Voip Debugging Using Rtp-Mib; Converged Network Analyzer (Cna) Test Plug - Avaya G450 Manual

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Management, Security, Alarms and Troubleshooting

SNMP

The G450 reports alarms using SNMP traps. The G450 fully supports SNMP versions SNMPv1

and SNMPv3.

The G450 features packet sniffing. All packets, including non-Ethernet packets, that pass

through the G450, are recorded. The recorded packets are stored in a file that can be uploaded

either to the S8xxx server or to a PC and read by Ethereal for troubleshooting purposes.

The G450 includes the RTP-MIB feature for debugging QoS-related problems across the VoIP

network without any dedicated hardware. During each RTP stream, counters representing

various QoS metrics increment whenever configured thresholds for the metrics are exceeded. A

limited history of the QoS metric statistics is stored on the G450 for active and terminated RTP

streams. Statistics can be displayed via the G450 CLI. In addition, the G450 can be configured

to send SNMP traps to the SNMP trap manager on the S8xxx server at the termination of each

RTP stream that has QoS problems. The traps are converted to syslog messages and stored

for viewing in the messages file on the S8xxx server hard disk.

CNA test plugs are a component of CNA, a distributed system tool for real-time network

monitoring that detects and diagnoses converged network-related issues. CNA is deployed in the

G450 to identify any network conditions or impairments that can degrade the user experience for

IP telephony and to monitor overall network performance. Test plugs in media gateways provide

the ability to measure end-to-end service to the edge of the PSTN, or at points where codec

changes are required for interworking between high (LAN) and low (WAN) speed links.

40 Administration for the Avaya G450 Media Gateway

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