IP Service Level Agreement
The Cisco IP Service Level Agreement (IP SLA) is a network performance measurement tool that is embedded in Cisco IOS. IP SLA allows the network operator to monitor the network performance-wise and see if the SLAs are adhered to. The network characteristics that you can monitor include jitter, one-way delay, RTT, and packet loss. These measurements can be done per class-of-service. IP SLA measures the network by sending periodic probes. The probes can be various protocol packets, such as ICMP, UDP, TCP, HTTP, Domain Name System (DNS), FTP, DHCP, and so on. The measurement of jitter and RTT can be particularly important if the network has Voice-over-IP (VoIP) traffic, because this type of traffic requires a small jitter ...
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