Alarms and troubleshooting features
VoIP debugging using RTP-MIBThe G250/G350 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 G250/G350 for active and terminated RTP streams. Statistics can be displayed via the G250/G350 CLI. In addition, the G250/G350 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.
Object trackingThe G250/G350 includes object tracking. The purpose of object tracking is to track the state (up/down) of remote devices using keepalive probes, and notify registered applications when the state changes. Object tracking is utilized by applications such as VPN to track remote devices and take certain steps when the state of a remote device changes.
Converged Network Analyzer (CNA) test plugCNA 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 G250/G350 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.
Link Layer Discovery Protocol (LLDP)LLDP simplifies network troubleshooting and enhances the ability of network management tools to discover and maintain accurate network topologies in multi-vendor environments. LLDP defines a set of advertisement messages (TLVs), a protocol for transmitting the TLVs, and a method for storing the information contained in the received TLVs. This allows stations attached to a LAN to advertise information about the system and about the station’s point of attachment to the LAN to other stations attached to the same LAN. These can be reported to the management station via SNMP MIBs.
On the G250, LLDP is supported on all the Ethernet LAN ports on the chassis.
On the G350, LLDP is supported on the Ethernet LAN ports located on the MM314 and MM316 media modules.