Synchronize Network Management Parameters across Network Devices

While I have stock homework assignments prepared for every module of the Building Network Automation Solutions online course I always encourage the students to pick a challenge from their production network and solve it during the course.

Pavel Rovnov decided to focus on consistency of network management parameters (NTP, SNMP, SSH and syslog configuration) across Extreme and Cumulus switches, Fortinet firewalls and several distributions of Linux.

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Mellanox Trims Down To Reach For A Profitable $1 Billion

If Mellanox Technologies had not begun investing in the Ethernet switching as it came out of the Great Recession, it would be a much different company than it is today. It might have even been long since acquired by Oracle or some other company, for instance.

To be sure, Mellanox might have been able to capture some business at the cloud builders, hyperscalers, and clustered storage makers with InfiniBand. But it would not have been the one to capitalize on moving InfiniBand-style technologies such as remote direct memory access (RDMA) to Ethernet, and it would not have been able to …

Mellanox Trims Down To Reach For A Profitable $1 Billion was written by Timothy Prickett Morgan at The Next Platform.

CCDE Practical/Lab Exam Result Policy

Many of my students have been asking whether CCDE Practical/Lab Exam Result policy is still the same.    As you might know after CCDE 2017 May exam cancellation  , practical exam results can be learned after 8 to 12 weeks. This mean, if you attend CCDE Practical exam, you cannot learn the result (Pass or fail) …

Continue reading "CCDE Practical/Lab Exam Result Policy"

The post CCDE Practical/Lab Exam Result Policy appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

CCDE Practical/Lab Exam Result Policy

Many of my students have been asking whether CCDE Practical/Lab Exam Result policy is still the same.    As you might know after CCDE 2017 May exam cancellation  , practical exam results can be learned after 8 to 12 weeks. This mean, if you attend CCDE Practical exam, you cannot learn the result (Pass or fail) …

Continue reading "CCDE Practical/Lab Exam Result Policy"

The post CCDE Practical/Lab Exam Result Policy appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

CCDE Practical/Lab Exam Result Policy

Many of my students have been asking whether CCDE Practical/Lab Exam Result policy is still the same.    As you might know after CCDE 2017 May exam cancellation  , practical exam results can be learned after 8 to 12 weeks. This mean, if you attend CCDE Practical exam, you cannot learn the result (Pass or fail) […]

The post CCDE Practical/Lab Exam Result Policy appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Telecom Operator Network Design Training

I missed writing , missed writing a post lot on the website specifically !. Because I know you are reading right now and wonder where I have been.   I just checked and seen that my last post was on October 26. More than 2 months , I didn’t share anything on the website. I …

Continue reading "Telecom Operator Network Design Training"

The post Telecom Operator Network Design Training appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Telecom Operator Network Design Training

I missed writing , missed writing a post lot on the website specifically !. Because I know you are reading right now and wonder where I have been.   I just checked and seen that my last post was on October 26. More than 2 months , I didn’t share anything on the website. I …

Continue reading "Telecom Operator Network Design Training"

The post Telecom Operator Network Design Training appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Telecom Operator Network Design Training

I missed writing , missed writing a post lot on the website specifically !. Because I know you are reading right now and wonder where I have been.   I just checked and seen that my last post was on October 26. More than 2 months , I didn’t share anything on the website. I […]

The post Telecom Operator Network Design Training appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Flattening Networks – And Budgets – With 400G Ethernet

If it were not for the insatiable bandwidth needs of the twenty major hyperscalers and cloud builders, it is safe to say that the innovation necessary to get Ethernet switching and routing up to 200 Gb/sec or 400 Gb/sec might not have been done at the fast pace that the industry as been able to pull off.

Knowing that there are 100 million ports of switching up for grabs among these companies from 2017 through 2021 – worth tens of billions of dollars per year in revenues – is a strong motivator to get clever.

And that is precisely what …

Flattening Networks – And Budgets – With 400G Ethernet was written by Timothy Prickett Morgan at The Next Platform.

IBM Gets Machines Back Into International Business

Designing and manufacturing processors – or paying a third party foundry to do some of the work – and then manufacturing systems and updating and modernizing operating systems and middleware is tough work. And it is work that few IT vendors and about the same number of hyperscalers do these days. Despite all of the gut-wrenching changes in the datacenter over the past six decades, International Business Machines is still in the game that it largely defined so long ago.

In the fourth quarter of 2017, the company’s System z mainframes had the highest shipment level, as gauged by aggregate …

IBM Gets Machines Back Into International Business was written by Timothy Prickett Morgan at The Next Platform.

CCIE SP Written and Lab Content Updates v4.1

For those who may not have heard, Cisco recently updated their blueprint for the CCIE Service Provider Written and Lab Exams. According to Cisco, only about 10% of the overall blueprint has changed and topics on 4.1 will be similar to those on 4.0. Read on to learn more.

Domain Changes:

4.1 domain topics are almost exactly the same as 4.0 topics. The main difference in domains is that domains 1 and 3 (service provider architecture and evolution and service provider base services) have been merged into one domain. While other domain topics did not change, slight shifts were made to domain weights.

Weighting of Domains:

 

 

Topic changes within the Domains:

  • Domain 1 (Core Routing): No topics were added or removed within this domain, but some items were moved, rephrased, or merged into one single item.
  • Domain 2 (Service Provider Architecture and Services) now holds tasks of the original domain 1 and 3. Other items that were part of domain 1, such as software architecture, mobility node functions, and virtualization concepts, were rephrased to better define their scope.
  • Domain 3 (Access and Aggregation) had a few topics items removed.
  • Domain 4 (High Availability and Continue reading

Weekend Reads 011918: IoT, Cyberthreat Thinking, and Techlash

Throughout 2016 and 2017, attacks from massive botnets made up entirely of hacked IoT devices had many experts warning of a dire outlook for Internet security. But the future of IoT doesn’t have to be so bleak. Here’s a primer on minimizing the chances that your IoT things become a security liability for you or for the Internet at large. —Krebs on Security

The cybercrime and cyber terrorism raging today are the most visible symptoms of a more pervasive problem concerning cyber security. How to establish a fair and just governance regime in cyberspace and establish international rules spark a storm of controversy. The controversy reflects the competing interests and demands of three distinct cyberspace actors: the state, the citizen, and the international community. By focusing only on one’s own interests, each actor ignores the interests of the other two, resulting in the current situation in which each sticks to its own argument and refuses to reconcile. —Hao Yeli

Deputy Attorney General Rosenstein has given talks where he proposes that tech companies decrease their communications and device security for the benefit of the FBI. In a recent talk, his idea is that tech companies just save a copy of the Continue reading

Web Cache Deception Attack revisited

In April, we wrote about Web Cache Deception attacks, and how our customers can avoid them using origin configuration.

Read that blog post to learn about how to configure your website, and for those who are not able to do that, how to disable caching for certain URIs to prevent this type of attacks. Since our previous blog post, we have looked for but have not seen any large scale attacks like this in the wild.

Today, we have released a tool to help our customers make sure only assets that should be cached are being cached.

A brief re-introduction to Web Cache Deception attack

Recall that the Web Cache Deception attack happens when an attacker tricks a user into clicking a link in the format of http://www.example.com/newsfeed/foo.jpg, when http://www.example.com/newsfeed is the location of a dynamic script that returns different content for different users. For some website configurations (default in Apache but not in nginx), this would invoke /newsfeed with PATH_INFO set to /foo.jpg. If http://www.example.com/newsfeed/foo.jpg does not return the proper Cache-Control headers to tell a web cache not to cache the content, web caches may decide to cache Continue reading

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