Enterasys Networks X-PeditionTM manual Alarm Management Traps, Measuring Performance Metrics

Network Management through SNMP

Alarm Management (Traps)

The following events are supported by SNMP traps: snmpTrapColdStart, snmpTrapWarmStart, snmpTrapLinkDown, snmpTrapLinkUp, snmpTrapAuthFailure, entityTrapConfigChange, frameRelayTrapfrDLCIStatusChange, ospfTrapIfStateChange, ospfTrapVirtIfStateChange, ospfTrapNbrStateChange, ospfTrapVirtNbrStateChange, ospfTrapIfConfigError, ospfTrapVirtIfConfigError, ospfTrapIfAuthFailure, ospfTrapVirtIfAuthFailure, ospfTrapIfRxBadPacket, ospfTrapVirtIfRxBadPacket, ospfTrapTxRetransmit, ospfTrapVirtIfTxRetransmit, ospfTrapOriginateLsa, ospfTrapMaxAgeLsa, ospfTrapLsdbOverflow, ospfTrapLsdbApproachingOverflow, bgpTrapEstablished, and bgpTrapBackwardTransition.

SNMP alarms are listed in Appendix A: “Alarms/Events, System Limits, and Standard ASCII Table” on page A-1.

Network Monitoring via Service Level Agreement Agent

The XSR supports a Service Level Agreement (SLA) agent to monitor network performance based on configurable latency, jitter, and packet loss metrics as well as to query the results. You can schedule measurements between the XSR and any remote host which supports the type of operation - ICMP echo - used to perform the measurement.

There are two management interfaces which operators can choose from to perform monitoring: CLI or SNMP. The SLA agent supported via the CLI is based on the de facto industry standard whereas the supported MIB provided by the SNMP interface is based on the Enterasys-Service-Level-Reporting-MIB(SLR). This MIB in turn is based on the IP Performance Monitoring Reporting MIB, now in RFC draft form.

The SLR MIB classifies network performance by network and aggregate measurements as follows:

•Network measure - Performs several metric measurements per packet exchange: each measurement step produces a single result per metric.

•Aggregate measure - Summarizes the results of previous network or aggregated measurements.

For example, metrics such as packet loss and round-trip delay are classified as network measurements while round-trip delay average and jitter metrics, which are calculated based on previous results, are classified as aggregate measurements. This is described further in the following sections.

Note: The SLA agent provides statistics based on round-tripmeasurements only and includes XSR processing time.

For more information on SLA-related CLI commands, refer to the XSR CLI Reference Guide. Refer to Appendix: B “Service Level Reporting MIB Tables” on page B-1for a list of XSR-supported fields and tables from the Enterasys Service Level Reporting MIB.

Measuring Performance Metrics

XSR performance metrics are measured as follows:

•D(i) - the value for the ith measurement

•Ri - receive time for the ith measurement

•Si - sending time for the ith measurement

2-40 Managing the XSR