Got told my fiber handoffs were causing jitter and had to redo half my network

A customer ran a 3-day latency test and sent me the results showing 15ms spikes every hour. I had to switch from single-mode to multi-mode transceivers on our Cisco gear and the problem vanished. Anyone else have a client call you out on something obvious you missed?

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simon_coleman2h ago

Used to think single-mode was always the better choice for everything, figured multi-mode was old tech. A similar thing happened to me on an MPLS handoff where the optics were just too sensitive for the distance and kept flipping bits. Swapped to multi-mode transceivers on both ends and the red errors dropped to zero, real eye opener how much the hardware specs actually matter in the real world.