Explains how one-way, two-way, loopback, and endpoint measurements use TWAMP-based probes to monitor delay, verify SLAs, and troubleshoot path-performance problems.
Delay measurement is a network performance monitoring method that
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measures the latency or delay experienced by data packets when they traverse a network
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uses the IP/UDP packet format defined in simple TWAMP using RFC8972 for probes, and
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employs time stamps applied at the echo destination (reflector) to enable greater accuracy for two-way or round-trip measurement capabilities.
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Feature Name |
Release Information |
Feature Description |
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Delay Measurement |
Release 25.4.1 |
Introduced in this release on: Fixed Systems (8010 [ASIC: A100])(select variants only*) *This feature is supported on:
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Delay Measurement |
Release 25.1.1 |
Introduced in this release on: Fixed Systems (8010 [ASIC: A100])(select variants only*) Delay measurement in SR networks involves monitoring the end-to-end delay experienced by traffic sent over an SR policy. Link delay metrics such as average, minimum, and maximum delay, and delay variance are used to determine network latency. You can ensure compliance with Service Level Agreements (SLAs) by monitoring the end-to-end delay experienced by traffic. *This feature is now supported on Cisco 8011-4G24Y4H-I routers. |
Two-Way Active Measurement Protocol
The Two-Way Active Measurement Protocol (TWAMP) is a network measurement protocol used for measuring two-way or round-trip IP performance metrics, such as latency (delay) and packet loss, between any two devices in a network. It adds two-way or round-trip measurement capabilities. In the case of TWAMP Light, the Session-Reflector doesn’t necessarily know about the session state. The Session-Reflector simply copies the Sequence Number of the received packet to the Sequence Number field of the reflected packet. The controller then receives the reflected test packets and collects two-way metrics. This architecture allows for the collection of two-way metrics.
Benefits of delay measurement
Delay measurement offers several key benefits for network management:
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Network troubleshooting: You can quickly and easily identify areas in your network with high delay and resolve network problems using delay measurement.
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Network planning and optimization: You can easily understand the performance of your network under various conditions and design a network that can handle expected traffic loads.
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Quality of Service (QoS): You can ensure quality of service standards are being met by continuously monitoring the delay in your network.
