Japan's Internet largely intact after earthquake, tsunami
So far, 'Net traffic to and from Japan remains near normal, says Renesys
Computerworld - Japan's Internet infrastructure has remained surprisingly unaffected by last week's devastating earthquake and tsunami, according to an analysis by Internet monitoring firm Renesys.
Most Web sites are operational and the Internet remains available to support critical communication functions, Renesys CTO James Cowie wrote in a blog over the weekend.
In the immediate aftermath of the earthquake off the Japanese coast, about 100 of Japan's 6,000 network prefixes -- or segments -- were withdrawn from service. But they started reappearing on global routing tables just a few hours later. Similarly, traffic to and from Japan dropped by about 25 gigabits per second right after the Friday quake, but returned to normal levels a few hours later. And traffic at Japan's JPNAP Layer 2 Internet exchange service appears to have slowed by just 10% since Friday, according to Renesys.
"Why have we not seen more impact on international Internet traffic from this incredibly devastating quake? We don't know yet," Cowie wrote.
An unknown number of people were killed and whole cities devastated by what was one of the worst earthquakes in over 100 years. The quake, which initially measured 8.9 on the Richter scale, generated a huge tsunami that inundated parts of Japan and put almost the entire Pacific coastline on a tsunami alert.
The effects of the quake, in terms of human loss and economic damage, are expected to be huge. The quake also disrupted electricity supplies and knocked two nuclear power plants out of commission. One reason Internet connectivity appeared to fare better could be that undersea cables remained relatively untouched by the quake, unlike in 2006 when an earthquake in Taiwan resulted in a large number of major cable breaks, Cowie said.
This time, the only noticeable breaks were in two segments of Pacnet's EAC submarine cable system, Cowie said. The system, which is owned by a consortium of six companies, is designed to provide up to 1.92 terabits per second of capacity across the Pacific. The breaks led to outages in several networks in Japan, the Philippines and Hong Kong.
Sections of the Pacific Crossing undersea cabling system connecting the U.S to Asia also appear to have been damaged. A note posted on Pacific Crossing's Web site this morning noted that two of the cables are currently out of service.
Pacific Crossing's cable lading station in Ajigaura, Japan was evacuated as a result of the tsunami. No information is available about when restoration efforts will resume, Pacific Crossing said.
Renesys noted that "lingering" problems with landing station equipment could generate new problems over the next few weeks.
Even so, "it's clear that Internet connectivity has survived this event better than anyone would have expected," Cowie said. He noted that Japan's attempts to build a "dense web" of domestic and international Internet connectivity appears to have paid off. "At this point, it looks like their work may have allowed the Internet to do what it does best: route around catastrophic damage and keep the packets flowing, despite terrible chaos and uncertainty."
Jaikumar Vijayan covers data security and privacy issues, financial services security and e-voting for Computerworld. Follow Jaikumar on Twitter at @jaivijayan or subscribe to Jaikumar's RSS feed . His e-mail address is firstname.lastname@example.org.
- Disaster hits Japan's semiconductor demand
- How Japan's data centers survived the earthquake
- U.S. roboticists complete mission to Japan's tsunami-hit coast
- Renesas to restart quake-hit factory earlier than expected
- Quake leaves Sony Ericsson with shortages of flagship phones
- Robots enter Fukushima reactor building for first time
- Person Finder a personal success for one Google worker
- Conflicts, disasters could hurt PC shipments in Q2
- Fukushima Daiichi workers clear debris by remote control
- Japanese earthquake shelters getting PCs, WiMax
Read more about Internet in Computerworld's Internet Topic Center.
- Capabilities You Need in an IP Address Management Solution A mismanaged IP space can cripple an otherwise healthy network. Take a moment to understand what you need in an enterprise-ready IPAM solution.
- IPv6 Fundamentals IPv6 is needed to sustain the growth of the Internet. The transition from IPv4 will require planning and likely some degree of support...
- 3G/4G Digital Signage Guide Today, the widespread availability of 3G and 4G cellular or wireless broadband networks enables digital signage to be deployed virtually anywhere.
- Enterprises in Motion: In-Vehicle Networks In a world where traditional tethers to the central office have all but vanished, enterprises that operate vehicle fleets require constant and dependable...
- Cloud BI in Action: Recorded Webinar of Customer, Kony, Inc. See how Kony, Inc., a leading enterprise mobility company, is using TIBCO Jaspersoft for Amazon Web Services and Redshift to achieve embedded analytics...
- Cloud BI Overview: Jaspersoft for AWS Check out this overview of Jaspersoft for AWS, to easily and affordably build business intelligence solutions as well as embed visualizations and analytics... All Internet White Papers | Webcasts
Our new bimonthly Internet of Things newsletter helps you keep pace with the rapidly evolving technologies, trends and developments related to the IoT. Subscribe now and stay up to date!