Standard Metrics/Parameters Clause Samples

Standard Metrics/Parameters listed some SLS definitions that are found almost in every SLA. The problem of having non-standard SLS parameters is that each vendor will provide his/her own definition of the metrics, confusing the customer since each parameter is subject to interpretation, and making interoperability between service providers very difficult. The IP Performance Working group [5] of the IETF has defined a framework for the specification of IP performance metrics [29] and is working on the identification of Internet service metrics. The Working group has so far defined two metrics dealing with the delay in IP networks: a One-Way Delay Metric for IPPM [31] and a Round Trip Delay Metric for IPPM [33]. The group has also defined two metrics that deal with loss and connectivity: a One-Way Packet Loss Metric for IPPM [32] and an IPPM Metrics for Measuring Connectivity [30].