Cisco Predicts Exabyte Networks

Cisco's recent forecast of global IP bandwidth consumption suggests a 37 percent cumulative average growth rate between 2006 and 2011, or about five times the 2006 level. That's aggressive, but you might expect that. You might even have expected the prediction that consumer usage will outstrip business usage, though business dominates at the moment. You wouldn't be surprised at all to learn that video will drive overall global usage.

You wouldn't necessarily be surprised to learn that Cisco forecasts at least 60 percent of all traffic will be commercial video delivered in the form of walled garden services. And a significant percentage of the remaining 40 percent of IP bandwidth will be consumed by IP-based video applications.

The next network, in other words, will be a video network that also carries voice and non-real-time data.

That would be a stunning change from the originally envisioned view of the Internet. But I think we have to recognize at this point that virtually none of the key developments in communications technology have developed as industry insiders, public policy proponents, technologists or entrepreneurs had supposed.

To be sure, all of the diligent work on Session Initiation Protocol will have a significant payoff. But that didn't stop Skype by rocketing past SIP using a proprietary approach.

The Telecommunications Act of 1996 was supposed to lead to an explosion of innovation by dismantling restrictions on "who" could be a provider of Class 5 switch services. Instead, innovation came from the Web. Perhaps despite the Telecom Act, all sorts of innovation has happened.

VoIP was supposed to transform the nature of communications. Instead, mobility, instant messaging and social networks are doing so. One might arguably look to all manner of text communications as the disruptive communications development of the past several decades, not voice.

And then there's electronic numbering and voice peering. Perhaps these approaches still will have some dramatic impact on global voice communications prices and ability to circumvent the "public network." But it's starting to look as though ENUM might be a next generation to provide the signaling system 7 function. That's not to say it is unimportant: only to say it was not what many had intended or expected.

So far, it would seem that the most disruptive impact of the whole basket of new technologies has been to disrupt our ability to predict the future. We've been wrong more than right, as we always are. IP networks are not now, and never will be, as closed as the old public network was. Neither are IP networks going to be "open," any-to-any networks in the old manner, with no intelligence or policies operating in the core of the network.

Lots of things can, and should, be done "at the edge." But increasingly, lots of things cannot. The transition of the global IP network to video also means a shift to real time services (and we aren't even talking about the same process at work for voice and visual collaboration). That spells the end of the completely "dumb network."

DHT Behind Skype Crash?

Not that anybody really claims to know, but there's some thinking that the Skype outage was caused by some failure of the Distributed Hash Tables that Skype Supernodes apparently maintain. Some say "this is normally very slow and done over UDP," so restoration, even once the problem is identified, will take some time. So even as the ability to send instant messages and set up voice sessions is restored, other niceties, such as correct "presence" information, might take a little longer. The immediate problem, some say, is that if a Skype client cannot find a Supernode (and I am not a techie, but understand a DHT corruption would have something very serious to do with that sort of failure mode, then even if a client is authenticated by a central server, the user would not be able to get onto the Skype network.

All I know is that this failure mode would explain why I can communicate using text, and send audio, but my presence shows as "offline," when I am "online." I will test a live conversation tomorrow morning and see what happens.

This is a crisis management professional's dream: when your client is getting lots of bad press, some other bigger event occurs to overshadow it. So Skype now is sucking all the oxygen out of the "I'm mad my VoIP doesn't work" room.

Skype Sorta, Kinda Up

Though my status shows "offline" to Rich Tehrani, my Skype client seems to be up, though sending incorrect status information. Not many contacts seem to be visible at the moment.

Skype Outage Not Over

Skype initially said its outage is over, but that clearly is not the case everywhere, and we are nearing 24 hours since the log-in problem began. Now Skype warns that the outage is likely to continue through Friday. My U.S. log-in still hangs.

The service had been sporadic but gradually improving during the business day in Asia on Friday, some report.

"There are about 2.5 million people logged in right now, where normally there would be over 8 million, and it's been going on and off every 10 minutes," says Mark Main, senior analyst at Ovum in London.

You may draw your own conclusions about which other application or service providers might benefit, but urges to gloat should generally be suppressed. Nobody whose service uses IP and the public networks is safe from outages or service disruptions.

That's why businesses and networks have redundancy. People who scream and yell about losing their service have only themselves to blame if they didn't build some level of diversity and redundancy even into their personal communications. Use Skype, other IM applications, mobiles, POTS-replacement VoIP, and POTS, email and anything else you can get your hands on. Some of us use multiple mobiles from different providers and multiple broadband providers. But never hang everything on any one service or provider, especially if your business depends on it. Personally, I wouldn't even hang my personal communications on a "single provider" strategy.

Dark Skype

Skype Ltd. early today blamed an unspecified "software problem" for an outage that might make the service unavailable for as long as 24 hours. At 9 a.m. EDT Skype said the outage might last 12 to 24 hours.

Most people are finding it impossible to dial out or open an instant message session with any of their contacts. A "Connecting" message just hangs.

Skype rarely goes offline. The last reported outage resulted in the service going dark for several hours in October 2005.

Fred Pitts Back in Service with TeleBlend

It took 10 days, but TeleBlend customer Fred Pitts FINALLY is back in service.
"My first try to call home this morning continued with the "fast busy" signal; by midmorning, however, it was working," Pitts says. "So, while disappointed to have been without incoming service for such a length of time, I am thankful today that I am back up. I hope everyone else will be back in service soon as well."

A gracious comment, I'd say. At least some disgruntled SunRocket customers who picked TeleBlend as a replacement say they have churned to other providers such as Packet8 and Vonage.

A harrowing experience, to be sure. Perhaps it is only fair to note, though, that of the 60,000 transitioned customers, nearly all made the flash cut without much apparent disruption. Call it 99 percent. But one percent of 60,000 is still 600 customers, and it will be scant comfort to know that (hypothetically) 54,000 customers had no real issues.

That's the devil with mass market services, though, isn't it? Getting 99 percent of things right still generates thousands of trouble tickets (I'm not suggesting TeleBlend had issues with as many as one percent of its accounts, by the way. Just making the point that a very small failure rate in a mass market application or service can result in huge trouble ticket queues.)

Skype apparently still is having a major outage itself today, and as older posts today note, at&t and Cisco have had issues this month as well. S*** happens even to companies as large and sophisticated as Cisco and at&t.

And Cisco Goes Down, Also...

Cisco's main www.cisco.com page was offline at 11 a.m. Pacific Time on Aug. 8 and stayed offline for more than two and a half hours. It returned at about 1:45 p.m. The outage was an unintended byproduct of routine maintenance.