Tech Specs / Interface Flapping

Know when it's your network, not the internet

OverviewTechnical

Twelve hosts just went red at once. Is your internet down, your VPN dropped, or is something actually broken out there? Most monitoring tools can't tell you — ProbeScope can.

ProbeScope terminal showing the en0 [up] badge in green, with a clean fleet and no recent flapping
Steady state — en0 [up], no flapping in sight
ProbeScope terminal showing the en0 [up] badge in green, with a clean fleet and no recent flapping
ProbeScope terminal showing en0 back to [up], but with the same red band synchronized across every host's sparkline history from a past interface flap
After a flap — every host shares the same red band, immediately readable as one cause
ProbeScope terminal showing en0 back to [up], but with the same red band synchronized across every host's sparkline history from a past interface flap

Your local link, watched too

ProbeScope doesn't just watch remote hosts — it watches the network interface it's running on. A clear badge in the title bar shows you the moment your own connection flaps, so a wave of host failures immediately reads as one cause instead of a dozen separate mysteries.

Perfect for laptops, VPNs, and Wi-Fi

Working from a coffee shop, testing a new VPN config, or troubleshooting a flaky home router? Interface flapping detection tells you instantly whether the problem is on your end — before you waste time investigating hosts that were never actually the issue.