Weekly internet health check, US and worldwide

ThousandEyes, which tracks internet and cloud traffic, provides Network World with weekly updates on the performance of three categories of service provider: ISP, cloud provider, UCaaS

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Globally, collaboration app network provider outages decreased from 3 to 1, a drop of 66% when compared to the week prior. In the U.S., no collaboration app network outages were recorded this week.

There were two noteworthy outages during the period:

Verizon Business suffered an outage within their network that impacted users accessing services such as Zoom, Bloomberg Professional and Flagstar Bank. The outage centered on former UUNET nodes located in San Jose Calif., and Seattle. The outage occurred just before 11:00AM PDT on July 27 and lasted a total of 27 minutes, over a 55-minute period. The outage cleared around 11:55AM PDT.

Reddit users began to experience some errors when accessing Reddit's site around 10:30AM EDT on July 29. During the incident, the Reddit site was reachable, but many of the page components produced errors either failing to load or simply not responding to requests, all of which is indicative of an application issue as opposed to a network disruption. A fix was implemented by Reddit at 1:32PM EDT, and Reddit announced that the issue had been resolved at 3:24PM EDT.

Update July 27

During the week July 20-26, the number of outages globally in all three categories increased by 14% from the week prior, from 231 to 263. In the U.S., outages rose from 70 to 90, a 29% increase from the week prior.

The number of ISP outages globally increased by 5%, from 175 to 183. In the U.S., ISP outages rose from 60 to 73, a 22% increase and a return to late June levels.

Cloud-provider outages worldwide were almost double, increasing 93%, from 15 to 29. In the U.S., there were three public cloud network outages for the second consecutive week.

Globally, collaboration-app network provider outages increased from 1 to 3, a rise of 200%, with all outages attributed to a single provider in the U.S. These were the first collaboration outages seen domestically since mid-June.

The most noteworthy outage of the week occurred just after 3:15 a.m. EDT on July 23 when services on Garmin.com and Garmin Connect became interrupted. The outage – which at the time of this writing is ongoing – also affects Garmin call centers, which were unable to receive calls and emails or participate in online chats. The network connectivity to Garmin services remains active, but syncing data and accessing functions on Garmin Connect remain down. Since Thursday, users attempting to access these functions have been met with a “Server Maintenance” message. In a press release on the 27th, Garmin confirmed it suffered a cyber attack that encrypted some of their systems, resulting in many of their online services being interrupted.

Update July 20

During the week of July 13-19 global outages of all three kinds dropped 19% from the week before, from 285 to 231. The drop in U.S. outages was even greater – 28% - from 97 to 70.

ISP outages dropped globally from 215 to 175 or 19%. In the U.S. they dropped 34%, from 91 to 60.

Cloud provider outages dropped 58%, from 36 to 15, and most of those occurred in South America. U.S. outages rose from two to three, or 50%.

Globally, collaboration-app network outages decreased from four to one,  a drop of 75%,  with the outage attributed to a single provider in the U.K. There were no outages in the U.S. for the fifth week in a row.

GitHub suffered an outage just after 2:30 a.m. EDT July 13 that lasted until 4:31 a.m. EDT. Users were affected worldwide. GitHub hasn’t provided details about what caused the outage, but ThousandEyes said there are indications that the source was within GitHub services.

WhatsApp suffered an outage for about an hour on July 14 starting about 6:45 p.m. EDT that prevented users globally from sending and receiving messages on the service. Once the outage was over, users could connect to the service, but once loaded they were unable to execute any functions. WhatsApp confirmed to ThousandEyes that the cause was an internal update to servers.

Update July 6

For the week June 29-July 5, the number of global outages across all three categories increased from 199 to 208, a 5% increase. In the U.S., however, outages dropped from 83 to 63, a 24% decrease from the week prior.

Globally, the number of ISP outages decreased 5%, from 160 to 152. The number of U.S. ISP outages decreased as well, from 77 to 55 outages. Both drops represent the lowest numbers of ISP outages since February.

Worldwide, cloud-provider outages decreased by 11%, from 28 to 25. The lone cloud-provider outage recorded in the U.S. this week was a decrease of 80% from five outages the week before.

Globally, collaboration-app network provider outages increased from 0 to 2, the first outages recorded since early June. The U.S. had zero collaboration app outages this week, recording just two outages in all of June.

There were two noteworthy outages during the period:

On June 29 at 8:15 a.m. PDT a power failure affected the Google Compute Engine in service zones us-east1-c and us-east1-d. Customers experiencing the service interruption would not have been able to reach existing Virtual Machines or create new ones. Other zones in the region were not impacted, so a redundant architecture, where workloads are hosted in multiple zones within a region, would have mitigated user impact. Google announced that all services had been restored and the issues resolved at 1:06PM PDT.

On July 4 about 5 p.m. PDT Comcast suffered a 33-minute outage affecting U.S. uses and those in multiple other countries trying to access services using the Comcast network. The outage was caused by two events over a 40-minute period and affected Comcast nodes on the U.S. east and west coast and the central region. The outage was cleared at 5:45 p.m. PDT.

Update June 29

The total number of global outages for the week of June 22-28 decreased by 29% from the week prior, reaching the lowest number of outages observed since early April. In the U.S., the number of outages was down by 20%.

ISP outages were also down to the lowest levels recorded in the past eight weeks. Globally, the number was down by 26% this week, dropping from 216 to 160. In the U.S., ISP outages were down by 20% compared to last week, from 96 to 77.

Globally, cloud-provider outages decreased by 39% this week from 46 to 28, with the bulk being attributed to South America. In the U.S. cloud provider outages were down by 55% from 11 to five compared to the week prior.

Globally, last week saw zero collaboration app network provider outages for the second week in a row.

Comcast Cable Communications suffered a 24-minute outage affecting users across the U.S. accessing services including Zoom, Visa and Bank of America. The outage was focused on Comcast infrastructure located in Seattle, Wash., and was cleared just after 2:30AM PDT.

Update June 22

Cloud provider outages spiked to new record-level highs for the week of June 15-21. Globally, the number of cloud provider outages increased from 20 to 46, a 130% increase. In the U.S., the number of outages increased 175%, from 4 to 11.

Last week also saw record-level lows. For the first time since the week of February 24, there were zero collaboration app network provider outages both globally and in the U.S.

Globally, the number of ISP outages decreased marginally last week, dropping from 221 to 216. In the U.S., however, the number of ISP outages increased by 22%, compared to the week prior.

From a total outage perspective, the number decreased marginally globally, from 287 to 282. The U.S., however, saw a 14% increase in outages relative to the week prior. From 99 to 113 outages.

An outage of note occurred June 18 at 2:45 PDT and lasted 23 minutes, affecting multiple countries including Australia, France, Germany and the U.K. The outage affected access to Microsoft services including some identity systems and appeared to originate in Microsoft nodes in Des Moines, Iowa. The outage was divided into two outages over two hours, concluding just after 5 p.m. PDT. Click here for an interactive view of the outage.

Update June 15

During the week June 8-14, worldwide the number of total outages in all three categories rose 35%, and jumped 34% in the U.S.

ISP outages globally increased 32% from 168 to 221 and rose 14% in the U.S. from 68 to 79.

Cloud-provider outages decreased from 23 to 20 (-13%) and doubled from two to four in the U.S.

Global collaboration-network outages quadrupled from one to four worldwide and remained flat in the U.S. with one outage.

Verizon Business suffered a two-minute outage June 10 at 2:50 p.m. PDT that affected users in multiple countries trying to access services from Microsoft, Zoom and Amazon, among others. The outage centered on infrastructure in Seattle. The brevity of the problem indicates the systems were reacting automatically to address a fault.

Update June 8

During the week of June 1-7 he number of outages across all three categories of providers decreased 15% (249 to 212) worldwide vs. the week before, and dropped 29% in the U.S. (104 to 74).

ISP outages worldwide fell from 196 to 168, and in the U.S. the decline was from 91 to 68.

Public-cloud outages globally dropped from 26 to 23, and from six to two in the U.S.

Outages for collaboration-app networks all took place in the U.S. over the past two weeks and fell from seven to one.

Cable operator Spectrum sustained an outage June 2 that affected multiple channels across the U.S., with East Coast viewers suffering the worst of it for about three hours from just after 9 p.m. Eastern to around midnight.

Update June 1

The total number of outages worldwide among all three categories decreased 11% from 280 to 249 during the week of May 25-31, and declined 10% in the U.S. from 115 to 104.

The number of ISP outages decreased 13% globally from 225 to 196. In the U.S. they dropped from 109 to 91, a 17% reduction.

Public-cloud outages dropped from 35 to 26 worldwide but increased in the U.S. from two to six.

Collaboration app network provider outages totaled seven worldwide, up from four the prior week, and in the U.S. jumped seven-fold from one to seven.

Amazon suffered an outage May 28 startinn about 12:12 p.m. PDT when its website because unreachable for some users globally due to a DNS failure, making it impossible for some users to reach Amazon’s servers. The DNS servers were available at the time, so the problem was likely a misconfiguration. The issue was resolved by 12:38 p.m. PDT.

Update May 25

ISP outages jumped by more than a third in the U.S. during the week ending May 24, while outages among all three categories of provider registered a small increase.

Total outages among all categories rose from 263 to 280 globally, and from 86 to 115 in the U.S.

ISP outages rose from 223 to 225 worldwide, with most of the increase due to outages in the U.S., which jumped from 80 to 109.

Public cloud outages overall rose from 24 to 35, with U.S. outages only ticking up from one to two.

Collaboration app network outages dropped from four to five compared to the week before, with a drop in U.S. outages from five to one accounting for the improvement.

There were two noteworthy outages during the week:

  • Just after 3 a.m. EDT on May 20, Google suffered an outage in the East Coast part of its network that affected users accessing site such as Uber and Shopify that are hosted by the public cloud provider. The outage lasted nine minutes and was located in the New York City metro area, and since it was during off-peak hours, impact on users was likely minimal. Click here for an interactive visualization of the outage.
  • About 8 a.m. EDT on May 22, Hurricane Electric suffered an outage that lasted more than an hour and affected several countries. The worst part lasted 44 minutes. The outage was observed at Hurricane Electric nodes across multiple global locations, and affected users reaching sites including Microsoft, Amazon, Workday and Credit Suisse. Click here for an interactive visualization of the outage.

Update May 18

The total outages globally leapt up 22% between the week of May 4-10 and the week of May 11-17, from 216 to 263.

ISP outages worldwide grew from 183 to 223, while those outages in the U.S. moved up from 74 to 80.

Public cloud outages grew from 13 to 24 worldwide, but dropped from three to one in the U.S.

Collaboration app providers dropped worldwide from six to five, while for the third week in a row the U.S. outages totaled five.

One noteworthy outage found users around the world unable to load content hosted by YouTube for about half an out on May 14 starting about 4 p.m. PDT. Users could connect to YouTube servers, but the service itself didn’t load properly. ThousandEyes said a critical object on the site was responding erroneously, indicating a web-application issue, perhaps due to a site update or change.

Update May 11

Overall outages dropped for the second week in a row, from 282 the week before last to 216 (23%) last week. In the U.S. outages fell from 98 to 83 (15%).

ISP outages worldwide were down 22% (from 236 to 183) and in the U.S. they fell 18% (from 90 to 74).

Cloud networking outages dipped from 13 to 12 (7%) worldwide, and in the U.S. dropped from 3 to 1 (66%)

Collaboration-application network outages fell worldwide from seven to six (14%) and stayed steady in the U.S. at five.

ISP Cogent Communications suffered a notable 38-minute outage starting on May 5 about 12 a.m. PDT, affecting its infrastructure in the U.S., U.K., Canada and France. Traffic terminated in Cogent’s network, and users were unable to reach sites such as Amazon, Microsoft, WorldPlay and Oracle Cloud.

Update May 3

Overall, the number of outages dropped across the board last week, from 313 to 282, a decrease of 31worldwide, mainly due to a drop in overall U.S. outages from132 to 98.

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