Vietnam Cable Faults Cut International Capacity

Ngoc Nguyen and Duc Thien, Tuoi Tre News
August 27, 2026

Faults affecting three international subsea cable systems have reduced Vietnam's overseas Internet capacity by an estimated 30 percent, according to domestic operators and cable management units. SJC2 and AAE-1 recently went out of service while repairs to the previously damaged AAG system remain incomplete, leaving three major routes simultaneously affected.

AAE-1 links Vietnam to Hong Kong and Singapore and failed at 6:22 p.m. Tuesday. Repair work is expected to begin in late September, although the schedule depends on specialized vessel availability and sea conditions. The report did not provide a restoration date for SJC2 or confirm completion timing for the continuing AAG repair.

Vietnamese Internet providers have redirected traffic through unaffected submarine systems and terrestrial networks. VNPT said it had balanced capacity across alternative routes, keeping its network generally stable. Operators nevertheless warned that customers could encounter slower connections and higher latency during peak periods, especially when using overseas-hosted websites, streaming platforms and online games.

Vietnam relies mainly on six international submarine systems: AAG, IA, AAE-1, APG, ADC and SJC2. The newest of the affected routes, SJC2, extends roughly 10,500 kilometers across the Asia-Pacific region and was designed for capacity of up to 126 Tbps. The overlapping faults underscore the operational value of route diversity, but the available backup capacity may still come under pressure until repairs restore the affected systems.

View source