RouteLeaks
RouteLeaks refer to the unintended propagation of routing information within Internet routing, most commonly in the Border Gateway Protocol (BGP). A route leak occurs when routes learned from one BGP neighbor or policy set are advertised to another neighbor in a way that violates the intended routing policy or trust boundaries. This can cause prefixes to be advertised beyond their intended scope or with altered path attributes, potentially leading to suboptimal routing, instability, or traffic being directed through unintended networks.
Causes of route leaks often include misconfigured route filters or prefix lists, incorrect use of BGP communities,
Impact ranges from degraded performance and increased latency to temporary loss of reachability or exposure of
Mitigation and detection efforts emphasize strict policy design and enforcement. Techniques include thorough prefix filtering, AS-path