The information collected includes data about response time, one-way latency, jitter (interpacket delay variance), packet loss, voice-quality scoring, network resource availability, application performance, and server response time. In its simplest form, Cisco IOS IP SLAs verify whether a network element, such as an IP address on a router interface or an open TCP port on an IP host, is active and responsive.įor information about SNMP operation, see the SNMP chapter of Cisco's Internetworking Technology Handbook, available at. Ĭisco IOS IP SLAs use the Cisco Round-Trip Time Monitor (RTTMON) Management Information Base (MIB) for communication between the external Network Management System (NMS) applications and the Cisco IOS IP SLAs operations running on the Cisco devices.Īs an additional feature, SNMP notifications based on the data gathered by a Cisco IOS IP SLAs operation allow the router to receive alerts when performance drops below a specified level and when problems are corrected. These thresholds can trigger additional events and actions. The following sections detail IP SLAs terminology and operation, before configuration, verification, and examples are provided in later sections. ![]() The embedded Cisco IOS IP SLAs measurement capability allows network managers to validate network performance, proactively identify network issues, and verify service guarantees by using active monitoring to generate probe traffic in a continuous, reliable, and predictable manner. This measurement capability also helps create a network that is "performance aware." Using IOS IP SLAs measurements, Cisco network equipment can verify service guarantees, validate network performance, improve network reliability, proactively identify network issues, and react to performance metrics with changes to the configuration and network.
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