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Category Archives for "Networking"

Cisco CEO: Webex service outage ‘unacceptable’

Cisco Webex users continue to experience intermittent problems today, some 24 hours after a complete outage of the collaboration system started – a situation that prompted company CEO Chuck Robbins to Tweet:“The @webex outage today is unacceptable, and we apologize for the disruption caused to you, our customers. Webex Meetings is now functional. Our engineers are working to restore Webex Teams and ensure this doesn’t happen again. Thank you for your patience & trust.”RELATED: 4 reasons Microsoft Teams will kill Slack… and 4 reasons it won’t According to the company’s website, a major outage began at 0122 GMT on Sept. 25, 2018, and shut down all Webex services, including Calling, Meetings, Control Hub, Hybrid Services, and Team.   To read this article in full, please click here

History Of Networking – John Fraizer – BGP Route Servers

In this History of Networking episode, John Fraizer joins the Network Collective crew to talk about his involvement in the first IX in the Chicago area and how that lead to the creation of an open source BGP route server.

John Fraizer
Guest
Russ White
Host
Donald Sharp
Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post History Of Networking – John Fraizer – BGP Route Servers appeared first on Network Collective.

The Best Practice Forum on Gender and Access: Empowering Women Online

A Need for More Gender-Disaggregated Data

While Internet access and use is rapidly growing all over the world, women still face several challenges that hinder them from benefiting meaningfully from it. The proportion of women able to access and use the Internet is 12% lower than the proportion of men accessing and using it worldwide. This gap is even bigger in developing countries where only one out of seven women use the Internet.

These numbers highlight some of the discrepancies that the digital gender gap is both producing and reproducing. However, understanding them and to what extent they affect women’s online lives requires more data. While many studies have been conducted in the last few years in order to gather evidence about the existing barriers, there are still many aspects of the phenomenon that need to be studied in-depth, particularly at grassroots levels.

Various recent efforts – including those of the W20, the UN Broadband Commission on Sustainable Development, the Alliance for Affordable Internet (A4AI), the World Wide Web Foundation, the GSMA and Association for Progressive Communications – have expressed concerns about the paucity of gender-disaggregated data and insights on Internet access and use masks the true extent of Continue reading

Bandwidth Alliance: powered by smart routing on Cloudflare’s network

Bandwidth Alliance: powered by smart routing on Cloudflare’s network

Today, we’re excited to announce the launch of the Bandwidth Alliance, a group of cloud providers that have agreed to reduce data transfer fees for mutual customers.

Bandwidth Alliance: powered by smart routing on Cloudflare’s network

Three things were required to make the Bandwidth Alliance a reality:

  1. An ecosystem of like-minded companies who want to provide reduced data transfer fees to their customers.
  2. A large global and well-connected network (Cloudflare has 150+ points of presence around the world and multiple peered and paid links at each location). Our network is connected to thousands of partners through transit providers, Internet exchanges, peering interconnects, and private network interconnects. Having a large network footprint allows us to meet our partners where their infrastructure is and exchange traffic with them over low-cost or free connections, instead of expensive paid transit.
  3. Argo, our sophisticated traffic routing engine. Argo allows us to make decisions on how to carry traffic across our network in ways that optimize for a number of factors: latency, throughput, jitter, or in the case of the Bandwidth Alliance, cost to our partners to exchange traffic. This routing engine is the technical underpinning of the Bandwidth Alliance.


Typically, as traffic moves across the Internet, packets are exchanged between multiple networks as they Continue reading

Introducing the Bandwidth Alliance: sharing the benefits of interconnected networks

Introducing the Bandwidth Alliance: sharing the benefits of interconnected networks
Introducing the Bandwidth Alliance: sharing the benefits of interconnected networks

At Cloudflare, our mission is to help build a better Internet. That means making the Internet faster, safer and smarter, but also more efficient alongside our cloud partners. As such, wherever we can, we're on the lookout for ways to help save our common customers money. That got us looking into why and how much cloud customers pay for bandwidth.

If you're hosting on most cloud providers, data transfer charges, sometimes known as "bandwidth” or “egress” charges, can be an integral part of your bill. These fees cover the cost of delivering traffic from the cloud all the way to the consumer. However, if you’re using a CDN such as Cloudflare, the cost of data transfer comes in addition to the cost of content delivery.

In some cases, charging makes sense. If you're hosted in a facility in Ashburn, Virginia and someone visits your service from Sydney, Australia there are real costs to moving traffic between the two places. The cloud provider likely hands off traffic to a transit provider or uses its own global backbone to carry the traffic across the United States and then across the Pacific, potentially handing off to other transit providers along the way, until Continue reading

Edge computing is the place to address a host of IoT security concerns

Edge computing can greatly improve the efficiency of gathering, processing and analyzing data gathered by arrays of IoT devices, but it’s also an essential place to inject security between these inherently vulnerable devices and the rest of the corporate network.First designed for the industrial IoT (IIoT), edge computing refers places placing an edge router or gateway locally with a group of IIoT endpoints, such as an arrangement of connected valves, actuators and other equipment on a factory floor.To read this article in full, please click here

Infrastructure-as-Code Tools

This is the fourth blog post in “thinking out loud while preparing Network Infrastructure as Code presentation for the network automation course” series. Previous posts: Network-Infrastructure-as-Code Is Nothing New, Adjusting System State and NETCONF versus REST API.

Dmitri Kalintsev sent me a nice description on how some popular Infrastructure-as-Code (IaC) tools solve the challenges I described in The CRUD Hell section of Infrastructure-as-Code, NETCONF and REST API blog post:

Read more ...

Measuring the KSK Roll

It has been a trade-off between waiting long enough to have the key sentinel mechanism deployed in sufficient volume in resolvers to generate statistically valid outcomes and yet start this measurement prior to the planned roll of the KSK on 11th October 2018. These are early results, and reflect less than one week of measurement, but some strong signals are evident in the data.

BrandPost: Malicious Tactics Have Evolved: Your DNS Needs to, Too

Unfortunately, as cyberthreats have evolved, over 86% of companies that leave DNS unmonitored have not modernized their DNS to help thwart malware before malicious adversaries exploit the glaring hole on the network. This blog looks at the ways threats have evolved to take advantage of legacy DNS, and what organizations should do now to increase their defenses and reduce their attack surface.Remember when cyberattacks were delivered via faxes from Nigerian princes? Although the objective – separating a business from its money – hasn’t changed much, the methodologies certainly have. In the 80s and 90s, when enterprise networks were beginning to connect to the internet, DNS was simply the phone book that translated domain name to IP address. Soon enough, bad actors evolved from phreaking to phishing, dropping telephone scams in favor of the rapidly spreading internet, bombarding users with seemingly innocuous emails whose goal was to harvest network account and password information to gain inside access to applications, data, and ultimately money.To read this article in full, please click here

400G Ethernet demos, plugfest tout hyperscale network power

High-speed Ethernet is taking center stage this week at the European Conference on Optical Communication in Rome, Italy where a number of vendors including Arista, Cisco and Huawei are showing off gear that will power large-enterprise and hyperscale networks.The key demos come from the Ethernet Alliance and the 100G Lambda multisource agreement (MSA) group that are pushing technology advances needed to support 400G Ethernet, including new pulse amplitude modulation or PAM4 for electrical and optical interfaces, high-bandwidth switching silicon and a new high-density pluggable connector system known as QSFP-DD.To read this article in full, please click here

400G Ethernet demos, plugfest tout hyperscale network power

High-speed Ethernet is taking center stage this week at the European Conference on Optical Communication in Rome, Italy where a number of vendors including Arista, Cisco and Huawei are showing off gear that will power large-enterprise and hyperscale networks.The key demos come from the Ethernet Alliance and the 100G Lambda multisource agreement (MSA) group that are pushing technology advances needed to support 400G Ethernet, including new pulse amplitude modulation or PAM4 for electrical and optical interfaces, high-bandwidth switching silicon and a new high-density pluggable connector system known as QSFP-DD.To read this article in full, please click here

400G Ethernet demos, plugfest tout hyperscale network power

High-speed Ethernet is taking center stage this week at the European Conference on Optical Communication in Rome, Italy where a number of vendors including Arista, Cisco and Huawei are showing off gear that will power large-enterprise and hyperscale networks.The key demos come from the Ethernet Alliance and the 100G Lambda multisource agreement (MSA) group that are pushing technology advances needed to support 400G Ethernet, including new pulse amplitude modulation or PAM4 for electrical and optical interfaces, high-bandwidth switching silicon and a new high-density pluggable connector system known as QSFP-DD.To read this article in full, please click here

Microsoft Office 365

Office 365 IP Address and URL Web service describes a simple REST API that can be used to query for the IP address ranges associated with Microsoft Office 365 servers.

This information is extremely useful, allowing traffic analytics software to combine telemetry obtained from network devices with information obtained using the Microsoft REST API  in order to identifying clients, links, and devices carrying the traffic, as well as any issues, such as link errors, and congestion,  that may be impacting performance.
The sFlow-RT analytics engine is programmable and includes a REST client that can be used to query the Microsoft API and combine the information with industry standard sFlow telemetry from network devices. The following script, office365.js, provides a simple example:
var api = 'https://endpoints.office.com/endpoints/worldwide';

function uuidv4() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
}

var reqid = uuidv4();

function updateAddressMap() {
var res, i, ips, id, groups;
try { res = http(api+'?clientrequestid='+reqid); }
catch(e) { logWarning('request failed ' + e); }
if(res == null) return;
res = JSON.parse(res);
groups Continue reading