Solana Nearly Stalled After Teraswitch Routing Error Took 28.83% of Staked SOL Offline

Marinade Finance disclosed that the Solana network came close to stalling on the morning of August 12, after 28.83% of staked SOL lost connection — approaching the 33.34% threshold that would trigger a halt. The incident involved 90 validators and cost roughly 333 SOL in rewards. Marinade traced the root cause to a routing error at infrastructure provider Teraswitch: an erroneous route from a Miami node was broadcast to Europe and Asia-Pacific, knocking out 12 nodes across London, Amsterdam, Dublin, Frankfurt, Singapore and Tokyo. North America was unaffected, and the issue was fixed within 10 minutes. Marinade also flagged a concentration risk: ASN AS20326, which hosts more than a quarter of all staked SOL, saw 94% of its nodes go offline simultaneously, pushing the actual offline share to 27.34% — above the 25% cap set by SFDP. Helius, the network's second-largest node, stayed offline for 33 minutes, and only a handful of validators executed smooth failovers. Marinade said it will review staking concentration limits and push validators to disclose failover capabilities.