Apparently much of Asia, including Australia, has been reduced to minimal Internet bandwidth following the 7.1 magnitude earthquake and powerful aftershocks in Taiwan earlier this week. One article said 40% capacity, noting the outage may persist for days or weeks.
It's a reminder that many networks (and many kinds of networks) that we depend upon we also take for granted. And many of those have single points of failure known to only an elite few. In some cases (e.g., because the cables belong to competing providers) failure points are not known by anyone until it's too late. This is particularly true in Asia, as I've noted before, even among the tech-savvy. My more recent optimism in this regard may have been misplaced.
Forbes characterizes the failure as, "the largest outage of telephone and Internet service in years... demonstrating the vulnerability of the global telecommunications network."
...Up to a dozen fiber-optic cables cross the ocean floor south of Taiwan, carrying traffic between China, Japan, Korea, Southeast Asia, the U.S. and the island itself. Chunghwa Telecom Co., Taiwan's largest phone company, said the quake damaged several of them, and repairs could take two to three weeks.
Taiwan lost almost all of its telephone capacity to Japan and mainland China... Later, Chunghwa said connections to the U.S., China and Canada were mostly restored, but 70 percent of the capacity to Japan was still down, along with 90 percent of the capacity to Southeast Asia.
ZDNet says that "two of seven" cables were disrupted, enough to cause service-disrupting congestion on the remaining lines. Based on experience, I find the higher figure Forbes cites more likely, though it's possible that distinctions in terminology account for the difference.
The International Herald Tribune (among others) cites the oft-repeated idea that the Internet is by its very nature resilient:
Technicians in Singapore said that the Internet's built-in protocol was automatically rerouting traffic over alternative routes, either overland through China, west through the Middle East to Europe or even south to Australia.
All true... to a point... the problem being one of layer confusion: if the physical cables don't exist, nothing can be re-routed over them--automatically, manually or otherwise. (Wireless, much less satellite links, do not provide the kind of trunk capacity we're talking about over long distances.)
As this map shows that the IHT's wishful thinking about "overland through China" and "west through the Middle East" are really just ways of expressing grim humor while waiting for the broken undersea cables to be repaired. Last I checked, there were some really big mountains and corrupt Islamic, authoritarian and 'former' communist governments in the way. This map, showing China and vicinity makes this clear. This one shows only Alcatel submarine routes but nonetheless shows what's true of most other providers: most roads go near or through Taiwan. This one by China Telecom confirms the tiny capacity running west over land.
Could this recognition of a geographic reality (i.e., Taiwan as cross-roads on which the mainland is dependent) cause the Chinese to see with greater acuity their dependence on Taiwan... and act on it in new ways?
UPDATE: The W$J this morning confirms the criticality of the sea space around Taiwan:
While the clusters of glass fibers are enclosed in protective material, they remain vulnerable to undersea earthquakes, fishing trawlers and ship anchors. There are also many choke points around the globe, including the vicinity of Tuesday's earthquake, where a number of key cables converge... "It's unprecedented that all seven cable systems suffered damage at the same time," said Au Man-ho, director-general of the [Hong Kong] Office of the Telecommunications Authority.. [emphasis added]
Unprecedented stuff happens all the time. This whole incident is architecturally and organizationally reminiscent of what happened to communications on 9-11, including its effects across a much wider region. I.e., a common single point of failure among several trunk networks previously imagined to have been geographically distributed was discovered only in crisis.
Then there's this, also in the W$J:
...four repair ships with crews will arrive in the affected area on Jan. 2 to begin repair work on four of the damaged lines.
That's five days from now. The location is less than 100 miles off the coast. I can only surmise that the reason for the delays is one that both plagues and enables business resilience efforts (but which is seldom taken into account), namely: people. Mustering a crew to do the repairs (or perhaps mustering the factories to produce the materials needed to do the repairs) is no easy task over the Christmas/New Year's break. When things break, it's seldom at the most opportune time.
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