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Forum Discussion

nurairtt91's avatar
nurairtt91
Icon for Altocumulus rankAltocumulus
Sep 17, 2025

ISP link latency

We are currently load balancing internet outbound traffic via two ISP links. The transparent monitor is configured to verify the health of ISP links. However, we would like to monitor the ISP link la...
security
Nikoolayy1's avatar
Nikoolayy1
Icon for MVP rankMVP
Sep 17, 2025

This seems more like for dedicated SD-WAN solution not F5 BIG-IP that can monitor for latency between two locations that have SD-WAN devices or to a SaaS service by using probes that take the latency into account and dynamically changes the selected ISP links depending on the current latency.

zamroni777's avatar
zamroni777
Icon for MVP rankMVP
Sep 18, 2025

indeed.

i used to sell sdwan router and it has such auto link latency measurement as basic feature.
msrp was also lower than cisco wan router.

  • Nikoolayy1's avatar
    Nikoolayy1
    Icon for MVP rankMVP
    Sep 18, 2025

    F5 is a swiss army knife but it can't replace everything a corporate network. An older approach will be if a router even without SD-WAN features supports ip sla probes (this is what cisco calls them) and you can have 2 static routes and one to be removed if the sla marks the route as bad but better just go with an real SD-WAN solution as that is grandfather of SD-WAN 😁