Iran experiences BGP control plane disruption lasting 16 hours

Iran experienced a significant disruption to its internet control plane on August 15, 2026, lasting approximately 16 hours. The event primarily affected Border Gateway Protocol (BGP) visibility, a critical system for routing traffic between networks globally.

Technical Details

The disruption began at 06:15 UTC on August 15 and concluded at 22:15 UTC the same day. The BGP signal, which measures the control plane visibility of network prefixes, recorded a severity score of 1,474 during the event. This signal showed a median value of 41,174 visible prefixes, with a peak-to-trough drop magnitude of 0% from its maximum observed value of 41,269.

Other measurement signals showed varying impacts. The gtr-norm signal, which tracks deviation from an expected traffic baseline, recorded a 32% drop from its peak. The merit-nt signal, a proxy for aggregate connectivity, showed a 27% drop from its peak. The ping-slash24 signal, which measures ICMP reachability across IPv4 network blocks, showed a more modest 4% drop in reachability.

The cause has not been publicly attributed.

The disruption was resolved by the end of the observation period.