v2.9.5 · GPL
CBLM
Cheap Bastard Latency Monitor — a high-performance probe for one-way and round-trip latency, packet loss, and jitter. Run it on two or more servers and a full mesh of UDP connections is set up automatically. Statistics land in MySQL.
Measuring network performance
CBLM keeps a constant stream of traffic flowing between probes and tracks real-time performance. Use it to watch for positive or negative changes in your network or service provider. The PHP GUI offers graph and matrix views. Data lives in MySQL, so building your own tools is straightforward. CBLM also integrates with SellaNMS for exception-based alarming.
Detecting problems and configuration errors
CBLM tracks RTT, one-way trip time, jitter, packet loss, CoS (DSCP and VLAN priority) markings, out-of-order packets, and duplicates. Latency and jitter show how the network performs over time; loss highlights congestion and circuit issues; out-of-order and duplicate counts surface convergence problems; CoS tracking verifies end-to-end marking consistency.
Screenshots
