A routing anomaly occurred due to an incident of Global IPv6 Route Leaking, originating from a newly onboarded JasTel customer at NIX around 17:30 on July 09, 2025. These leaked routes were inadvertently propagated via JasTel’s network to other downstream customers receiving Full Route configurations.
As a result, approximately 200,000 unexpected routes were received, causing a malfunction in our Network Edge Switch at JasTel’s Jasmine Tower. This switch serves as an essential interconnection point between CSL-TC and Jasmine.
The incident resulted in connectivity disruptions primarily affecting Domestic traffic via True and AIS. Other routes such as 3BB, NT, TOT, and DTAC remained operational via TLH.
Although the main restoration was completed by 19:17, some users on AIS and TRUE networks continued to experience degraded domestic connectivity.
We decided to move the peering device from Network Edge at JasTel’s Datacenter to Network Edge at CSL-TC Datacenter which has more capacity and ability to apply peering policy. After successfully moving the peering device at 21:38, the domestic connectivity issues from AIS and TRUE were resolved.
