An internet milestone known as “768k Day” is getting closer and some network administrators are shaking in their boots fearing downtime caused by outdated network equipment.
The fear is justified, and many companies have taken precautions to update old routers, but some cascading failures are still predicted.
What is 768k Day?
The term 768k Day comes from the original mother of all internet outages known as 512k Day.
512k Day happened on August 12, 2014, when hundreds of ISPs from all over the world went down, causing billions of dollars in damages due to lost trade and fees, from a lack of internet connectivity or packet loss.
The original 512k Day took place because routers ran out of memory for storing the global BGP routing table, a file that holds the IPv4 addresses of all known internet-connected networks.
At the time, a large chunk of the internet was being routed through devices that were allocating TCAM (ternary content-addressable memory) large enough to store no more than 512,000 internet routes.
But when on August 12, 2014, Verizon added 15,000 new BGP routes, this caused the global BGP routing table to suddenly go over the 512,000 lines without warning. On older routers, this manifested by the global routing table file overflowing from its allocated memory, crashing the devices every time they attempted to read or work with the file. Companies like Microsoft, eBay, LastPass, BT, LiquidWeb, Comcast, AT&T, Sprint, and Verizon, were all impacted.
Many legacy routers received emergency firmware patches that allowed network admins to set a higher threshold for the size of the memory allocated to handle the global BGP routing table.
Most network administrators followed documentation provided at the time and set the new upper limit at 768,000 — aka 768k.
Global BGP routing table reaching 768,000 limit on older routers
CIDR Report, a website that keeps track of the global BGP routing table, puts the size of this file at 773,480 entries; however, their version of the table isn’t official and contains some duplicates.
A Twitter bot named BGP4-Table, which has also been tracking the size of the global BGP routing table in anticipation of 768K Day, puts the actual size of the file at 767,392, just a hair away from overflowing.
768 Day expected within a month
ZDNet spoke today with Aaron A. Glenn, a networking engineer with AAGICo Berlin, and Jim Troutman, Director at the Northern New England Neutral Internet Exchange (NNENIX).
Both estimate 768K Day happening within the next month.
But unlike many network admins, they don’t expect the event to cause internet-wide outages like in 2014. However, both Glenn and Troutman expect some companies and smaller, local ISPs to be affected.
“I would be mildly surprised if there was any interruption or outage at any real scale,” Glenn told ZDNet. “Ten years ago there was a much wider IP transit market. Now there are a handful of large players that have mostly suitable gear.”
“I don’t expect it to cause ‘massive disruption’ for the internet,” Troutman said, echoing his colleague’s thoughts. “The internet has a lot more resilience and redundancy than most people think.”
“There will certainly be some network operators and corporate end-user organizations who will be caught unaware and will experience problems,” he added.
Some network admins have prepared
The good news is that network admins have known about 768k Day for a long time, and many have already prepared, either by replacing old routers with new gear or by making firmware tweaks to allow devices to handle global BGP routing tables that exceed even 768,000 routes.
“Yes, TCAM memory settings can be adjusted to help mitigate, and even go beyond 768k routes on some platforms, which will work if you don’t run IPv6. These setting changes require a reboot to take effect,” Troutman said.
“The 768k IPv4 route limit is only a problem if you are taking ALL routes. If you discard or don’t accept /24 routes, that eliminates half the total BGP table size.
“The organizations that are running older equipment should know this already, and have the configurations in place to limit installed prefixes. It is not difficult,” Troutman added.
“I have a telco ILEC client that is still running their network quite nicely on old Cisco 6509 SUP-720 gear, and I am familiar with others, too,” he said.
The trick, according to Troutman, is to have ISPs and other network operators using older gear point all their outbound traffic for /24 routes to upstream transit providers, which are most likely running modern gear and will pick it up for their clients.
“If you are affected by 768k you know and have known and done everything you can already,” Glenn said, describing industry efforts to prepare for 768k Day.
Right now, it’s impossible to know how many routers and networks will be impacted on 768k Day, as there’s no Shodan search query that can give us the number and location of vulnerable routers.
But as Glenn told ZDNet, “the Cisco 6500/7600 product line was extremely popular for an exceptionally long time in many, many places,” so don’t be surprised if some networks go offline because they forgot about 768k Day and didn’t prepare.
More tech news coverage:
iPhone 14 May Debut In An Online-Only Event With Pro Price Hike
The iPhone 14 will bring plenty of changes this year, but most of them are apparently being reserved for the Pro models. The base models are also expected to feature a big change, but not one that some people will like — Apple may finally say goodbye to the 5.4-inch iPhone mini and go in the opposite direction by introducing a non-Pro iPhone Max. While that would be a tragedy for those who love small iPhones, it would also consolidate Apple’s smartphone collection and make it easier for buyers to understand what’s available.
The next-generation iPhone lineup will reportedly have two 6.1-inch models and two 6.7-inch models split between base and Pro lines. While there will be some upgrades across the board, the biggest changes will no doubt be seen on the iPhone 14 Pro and iPhone 14 Pro Max. The most visible will be — at least according to the rumors so far — the switch to a pill-shaped cutout, which would mean finally ditching the bucket notch that debuted with the iPhone X in 2017. New and improved cameras will likely be found inside the iPhone 14 Pro models, too, as well as a faster processor.
These upgrades won’t come without costs, however, and Apple may have buyers shoulder some of that. An investor note shared by Philip Elmer-DeWitt claims the Pro models will experience a $100 price increase. The current iPhone 13 Pro already starts at $999 and the iPhone 13 Pro Max begins at $1,099, so that would be quite a significant price hike. Apple is also expected to increase the storage in these iPhone models to make those figures easier to swallow, but it may still cause some interested buyers to pause when deciding which of the four iPhone 14 models to pick.
Dodge Charger Daytona SRT Concept Teases Electric Muscle Cars To Come
Three patented new features help give the Daytona SRT an edge. The e-Rupt multi-speed transmission system offers an “electro-mechanical shifting experience that’s pure Dodge,” the automaker says. The new transmission has a PowerShot boost system similar to the one included in the hybrid versions of the upcoming Dodge Hornet. Press a button on the steering wheel and you’ll get a bit of extra horsepower and some torque along with it — it’s for those occasions when you need to power past something on a highway, or if you need to take off from a standing start fast enough to tear a small hole in the fabric of time and space.
There’s a new aerodynamic pass-through feature named the “R-Wing” that gives the concept a performance edge while connecting it with its NASCAR record-breaking ancestor. Then, for muscle car enthusiasts who are upset the switch to electric may preserve someone in their vicinity’s eardrums, there’s the Fratzonic Chambered Exhaust. It’s an industry first, and as loud as a Hellcat at 127 decibels, so even though you’re being powered by a battery, people will still hear your muscle car coming. The system is a patented industry-first feature. Sound is produced electronically before being forced through an amplifier and “tuning chamber.” It is then blasted out of the car’s back end, recreating the muscle car audio experience without any of the emissions.
The Dodge Charger Daytona SRT is just a concept, so while you may be impressed by the noise both Dodge and its car are making, you won’t actually be able to buy one. However, there’s a good chance most — if not all — of its features will appear in Dodge’s first commercially released EV, which is scheduled to arrive in 2024.
The Reason Why Lamborghini Will Never Build A Manual Transmission Car Again
By January 2014, very few Gallardos were ordered with a manual gearbox — so few, in fact, that AutoGuide quoted company CEO Stephan Winkelmann as saying that the automaker’s team would have to double-check with the dealership from which the order was received to make sure the manual transmission request wasn’t an error.
Besides the lack of demand for cars with a manual transmission, Lamborghini’s advanced driving tech starting with the Huracán also warranted complete control over the vehicle, and the manual use of a clutch could potentially cause disharmony. In 2016, Reggiani said in an interview with Road & Track that engaging the clutch “creates a hole in the communication between what the engine is able to provide and how the car reacts to the power of the engine.”
The executive also said during the interview that even though the decision to drop the manual transmission option wasn’t easy, the automatic chassis control systems on newer Lambos meant there wasn’t really any other option. “If you want to control the power, the clutch must be under the control of the brain of the car, not your brain,” Reggiani said.
Google brings its Workspace Individual plan to one-person businesses in Europe – TechCrunch
Google is bringing its Workspace Individual subscription plan to Europe, a little more than a year after first introducing the...
Revolut to allow users to donate to the homeless via the Beam crowdfunding platform – TechCrunch
The world is entering a huge cost of living crisis, which will inevitably result in a rise in homelessness. But...
HBO Max is removing 36 titles and creators are not happy – TechCrunch
HBO Max is continuing its content removal spree with 36 titles going off the service this week including 20 of...
Tiger Global leads new funding in savings and investments app Jar – TechCrunch
Tiger Global has led a new funding round in Jar, the Indian fintech that is helping millions of Indians save...
Kenyan agtech iProcure raises $10.2M to grow its input supply network – TechCrunch
The shortage of agricultural inputs like fertilizer, unpredictable prices, and the proliferation of substandard products into markets are some of...
Social4 months ago
Web.com website builder review
Social3 years ago
CrashPlan for Small Business Review
Gadgets4 years ago
A fictional Facebook Portal videochat with Mark Zuckerberg – TechCrunch
Cars4 years ago
What’s the best cloud storage for you?
Mobile4 years ago
Memory raises $5M to bring AI to time tracking – TechCrunch
Social4 years ago
iPhone XS priciest yet in South Korea
Security4 years ago
Google latest cloud to be Australian government certified
Social4 years ago
Apple’s new iPad Pro aims to keep enterprise momentum