The Y.1731 feature provides the following performance monitoring capability for point-to-point links as defined in ITU-T Rec Y.1731. The following Y.1731 features are supported in SLX-OS 17r.2.00.
Y.1731 defines the following parameters and functions for performance monitoring.
Frame Loss Ratio—The Frame loss ratio is defined as a ratio, expressed as a percentage, of the number of service frames not delivered divided by the total number of service frames during time interval T, where the number of service frames not delivered is the difference between the number of service frames arriving at the ingress ETH flow point and the number of service frames delivered at the egress ETH flow point in a point-to-point ETH connection.
Frame Delay— Frame delay can be specified as round-trip delay for a frame, where Frame Delay is defined as the time elapsed since the start of transmission of the first bit of the frame by a source node until the reception of the last bit of the loop backed frame by the same source node, when the loopback is performed at the frame's destination node.
Frame Delay Variation— Frame delay variation is a measure of the variations in the Frame Delay between a pair of service frames, where the service frames belong to the same CoS instance on a point-to-point ETH connection.
Extreme SLX-OS 17r.2.00 software does not support the following Y.1731 features:
Note
We recommend that you issue the linktrace command before configuring on-demand Two-way ETH-DM or Two-way ETH-SLM to know the forwarding path.