Someone left a comment on my Zero-Touch Provisioning post claiming how Big Switch Networks solved ZTP challenge using just IPv6 Link-Local Address and Neighbor Discovery instead of the complicated DHCP/TFTP/whatever sequence.
Here’s what he wrote:
Read more ...Algorithmic glass ceiling in social networks: the effects of social recommendations on network diversity Stoica et al., WWW’18
(If you don’t have ACM Digital Library access, the paper can be accessed either by following the link above directly from The Morning Paper blog site, or from the WWW 2018 proceedings page).
Social networks were meant to connect us and bring us together. This paper shows that while they might be quite successful at doing this in the small, on a macro scale they’re actually doing the opposite. Not only do they reinforce and sustain disparities among groups, but they actually reinforce the rate at which disparity grows. I.e., they’re driving us apart. This happens due to the rich-get-richer phenomenon resulting from friend/follow recommendation algorithms.
… we find that prominent social recommendation algorithms can exacerbate the under-representation of certain demographic groups at the top of the social hierarchy… Our mathematical analysis demonstrates the existence of an algorithmic glass ceiling that exhibits all the properties of the metaphorical social barrier that hinders groups like women or people of colour from attaining equal representation.
“In the social networks now governing the knowledge, Continue reading
I recently had a need to get a specific subset of information about some AWS instances. Naturally, I turned to the CLI and some CLI tools to help. In this post, I’ll share the command I used to parse the AWS instance data down using the ever-so-handy jq tool.
What I needed, specifically, was the public IP address and the private IP address for each instance. That information is readily accessible using the aws ec2 describe-instances command, but that command provides a ton more information than I needed. So, I decided to try to use jq to parse the JSON output from the AWS CLI. If you’re not familiar with jq, I recommend you take a look at this brief introductory post I wrote back in 2015.
After some trial and error, here’s the final command I used:
aws ec2 describe-instances | jq '.Reservations[] | .Instances[] | \
{Id: .InstanceId, PublicAddress: .PublicIpAddress, \
PrivateAddress: .PrivateIpAddress}'
I’ll refer you to the jq manual for details on breaking down how this filter works. I’ll also point out that there’s nothing terribly groundbreaking or revolutionary about this command; I wanted to share it here just in case it may save someone Continue reading
The company saved about $83 million over the first half of fiscal 2018 though its HPE Next cost-cutting initiative.
SD-WAN is priority for enterprises that want to make their networks more automated.
The project claims greater security than traditional containers by tapping into virtual machine schema but remains compatible with Docker and Kubernetes in the container ecosystem.
This post is continuation of the Regular Expression for Network Engineer Part-1 , here we have a look for the different methods to find out the pattern in string.
Findall() – returns list of all the matches the pattern in a string without overlapping
[code language = “Python”]
re.findall(pattern, string[, flags])
In [118]: ip
Out[118]: ‘10.10.1.10,29.10.1.10,10.10.1.20,192.168.1.0,172.16.10.1,10.10.10.121’
In [119]: out= re.findall(r'(10.10.10.\d+)’ ,ip)
In [120]: out
Out[120]: [‘10,10.10.1’, ‘10.10.10.121’]
#Above example help us to find out all the IP’s of subnet 10.10.10.0/24 from group of ip’s.
[/code]
Match()-return a match object when pattern is found at the beginning of string, if no pattern is found ,result in None.
[code language = “Python”]
In [189]: text
Out[189]: ‘Cisco IOS Software, 7200 Software (C7200-SPSERVICESK9-M), Version 12.2(33)SRE, RELEASE SOFTWARE (fc1)’
In [190]: out = re.match(r”Cisco”,text)
In [191]: out
Out[191]: <_sre.SRE_Match object; span=(0, 5), match=’Cisco’>
In [192]: out = re.match(r” Software”,text)
In [193]: out
In [194]: out = re.search(r” Software”,text)
In [195]: out
Out[195]: <_sre.SRE_Match object; span=(9, 18), Continue reading
Automating your network can seem like a daunting task. But the truth is that automating Cumulus Linux with Ansible can be easier than many of the things you’re probably already automating.
In this post, I’ll show you how to get started on your network automation journey using a simple, four-step process:
To illustrate, I’ll be using the following simple, bare-bones topology based on the Cumulus Reference topology. You can follow along by spinning up your own virtual data center for free using Cumulus in the Cloud.
The first step is to pick one thing to automate. Just one! The only caveat is that it needs to be something you understand and are comfortable with. Trying to automate a feature you’ve never used is sure to scare you away from automation forever, unless of course you have someone guiding you through the process.
Preferably, pick something that’s quick and simple when done manually. Configuring the OSPF routing protocol between two switches falls into this category. When done manually, Continue reading
Security researchers tied the malware to a Russian group responsible for hacking incidents during the 2016 U.S. presidential campaign.
Newly released SDxCentral 2018 report on the VNF Ecosystem finds SD-WAN and vCPE are top use cases for NFV and the driving force behind service providers virtualizing their networks.
Many companies are looking at ways to accelerate their SDN adoption so they don’t risk falling behind.
Dustin Phillips, Co-Executive Director of ICANNWiki, is traveling across the United States in his red Toyota Corolla, making connections with the people who are making their communities – and the Internet – a better place. He visited the Bay Area, first making a stop at the Redwood National and State Parks, where he learned about redwood communities and how their survival is dependent on interconnection, a metaphor for the Internet itself.
What is the Internet Ecosystem?
The Internet affects nearly every aspect of society, creating an extremely wide range of stakeholders. There is still a community of stakeholders engaged directly with the Internet’s policymaking processes, but increasingly there are Internet-related discussions occurring at what would traditionally be considered unlikely venues.
CITRIS and the Banatao Institute
Meeting with Dr. Brandie Nonnecke at the University of California, Berkley’s Center for Information Technology Research in the Interest of Society (CITRIS) and the Banatao Institute was a fitting way to kick off my time in the Bay Area. We had a great discussion on the important role of civic participation and collaborative processes for informed decision-making in key issue areas.
Like the incredibly diverse plant life that grows in the understory Continue reading
This is a short article on creating a self-signed root certificate which can be used to self-sign certificates for the purposes of treating our telemetry and instrumentation exploration with the security love it deserves. I also cover configuration of mutual SSL for gRPC on Junos. An article of dual purposes!
One of the things I see far too often is clear-text transport being used in demonstrations, labs and even production. This isn’t acceptable. We live in a world where security has to be woven in from the ground up. How do you really know your system works if you leave out all of the security controls?
I hear your teeth grinding. Why do you want to do this? First of all, even though we can bypass security on gRPC with Junos by going for insecure connectivity with clear-text, we shouldn’t. The world we live in is all about the data and the smallest amount of it can give the ‘bad guys’ a lead.
Now we’re done with the why, we need to deal with the how. There are three approaches to PKI that are common:
We often treat security as an absolute, “that which must be done, and done perfectly, or is of no value at all.” It’s time to take this myth head on, and think about how we should really think about security.
The software is targeted at large-scale enterprises looking to make the jump from legacy or proprietary systems like those from Cisco.