Routing changes at the ISP can quietly add latency

[Amanhasnoname]

Internet traffic takes different paths depending on routing decisions at ISPs. A route that was fast last month can be slower today because the provider changed peering arrangements or a link went down.

Ping tests showing a sudden jump from 15 to 45 milliseconds with no changes on the local setup often point to this. The trade server has not moved, but the path to it has.

Tools like traceroute and MTR show each hop along the way and where the delay appears. A new hop or a long delay at a particular router identifies the problem. Sharing that information with the ISP or VPS provider sometimes leads to a fix.

Persistent routing problems may justify switching providers. A VPS host with better connections to the broker's data centre often delivers more stable latency.

Running a periodic ping test and logging the results gives a record to spot changes early, rather than discovering the problem after a string of bad fills.

Has a routing change ever caused a sudden latency jump, and how was it fixed?