Teraswitch has completed remediations to remove the bug-triggering configurations from our routers, as well as upgrading our route reflectors and adding diverse vendors on routing software. These stabilizations have proven reliable since July 30th, when we have not seen any additonal invalid packets (IS-IS LSA advertisements) inside our backbone.
We expect no further impacts from this issue.
Posted Aug 18, 2026 - 17:37 UTC
Investigating
[This message has been deleted, a distinct incident has been opened instead.]
Posted Aug 12, 2026 - 04:01 UTC
Monitoring
Since the initial impact, Teraswitch’s Network Engineering team has identified the instability as a routing software failure triggered during a routine configuration change. We have removed the triggering condition and implemented safeguards to prevent recurrence. The network remains stable while we complete software upgrades and permanent remediation.
Our current timeline of events is that the instability was triggered at approximately 19:09:21–27 UTC on July 29th 2026, and lasted for ~5 minutes.
More updates and a complete RCA will be released in future updates.
Posted Jul 31, 2026 - 14:33 UTC
Identified
Teraswitch is currently working on mitigations related to this issue, although traffic issues have settled.
At this time, it appears a bulk of the high-capacity US to EU cables had a fault around the same time. Our NY to London path, which had been cut and resolved earlier today, went down again, and our Ashburn to Frankfurt path suffered an outage around the same time.
At this time, the network has stabilized and we are working to ensure any additional events are not as impactful to traffic.
Posted Jul 29, 2026 - 19:35 UTC
Investigating
Teraswitch is looking into general Internet Instability.
Posted Jul 29, 2026 - 19:15 UTC
This incident affected: Global Network Services (Intra-Market Connectivity, Internet Exchanges and Peering).