Explains how SRv6 performance measurement monitors path availability, delay, and forwarding behavior to support service assurance, troubleshooting, and network optimization.
This chapter is dedicated to Performance Measurement (PM) in SRv6 networks, a vital capability for monitoring network performance and ensuring Service Level Agreement (SLA) compliance. It explores various PM functionalities, including liveness monitoring for both IP endpoints and SR policies, and detailed delay measurement techniques (one-way, two-way, loopback). The chapter also introduces SRv6 path tracing, explaining how it records actual packet paths, measures per-hop delays, and identifies interface loads, providing comprehensive diagnostic tools for network operators.
Performance measurement
Explains how SRv6 PM uses profiles, probes, metrics, history, and counters to measure path loss, delay, variation, bandwidth utilization, and liveness.
Liveness monitoring
Explains how endpoint and SR policy probes detect path availability and control candidate-path activation, supporting resilient forwarding, maintenance, load balancing, and service assurance.
Delay measurement
Explains how one-way, two-way, loopback, and endpoint measurements use TWAMP-based probes to monitor delay, verify SLAs, and troubleshoot path-performance problems.
Loopback-based performance monitoring for IPv6 endpoints
Explains how hardware-offloaded loopback probes measure IPv6 endpoint latency, loss, liveness, and ECMP paths without remote monitoring support or PTP clock synchronization.
Path tracing in SRv6 Network
Explains how SRv6 path tracing collects per-hop timing and interface-load information to reveal forwarding behavior and support detailed path diagnostics.