Dictionary: optic boom
optic boom
A flash produced when electrons move faster than light, akin to the boom of supersonic jets. Breaking the “light barrier” sounds like sci-fi, but physicists say it can happen in graphene sheets. The discovery could spark development of optical circuits a million times faster than silicon chips.
Link: The 21 Best New Words of 2016 | WIRED https://www.wired.com/2016j/12/21-best-new-words-2016/
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VMware NSX and SRM: Disaster Recovery Overview and Demo
In this post, I’ll briefly expand on the benefits of utilizing NSX as part of a disaster recovery (DR) solution. For additional information check out my prior multi-site and disaster recovery with NSX posts on the VMware Network Virtualization blog. Additionally, I recently presented at 2016 US VMworld and Europe VMworld on multi-site and disaster recovery solutions and recorded sessions can be viewed here: US VMworld, Europe VMworld.
Prior NSX Multi-site and Disaster Recovery Posts:
- Cross-VC NSX for Multi-site Solutions
- Enhanced Disaster Recovery with Cross-VC NSX and SRM
- NSX-V: Multi-site Options and Cross-VC NSX Design Guide
- Cross-VC NSX: Multi-site Deployments with Ease and Flexibility
- Multi-site with Cross-VC NSX: Consistent Security and Micro-segmentation Across Sites
- Multi-site with Cross-VC NSX and Palo Alto Networks Security
With disaster recovery, two challenges in general are:
- Recovering the application with the same IP address at the recovery site; this is important because typically there are other dependencies on this IP address such as possibly security, load balancer configs, DNS, application dependencies, etc.
- Ensuring security for the application is in place for the application upon disaster recovery; traditional solutions rely on manually updating or syncing security policies across the protected and recovery sites which is Continue reading
Happy New Year
Hi Everyone,
I wish you all a Happy New Year!
Currently im very busy studying for my 2nd attempt at the CCDE Practical exam.
I have it booked for the next slot, which is February 22nd in London.
Thankfully there are more and more material available for the CCDE than just a year ago. One of my primary sources are the study group which I have mentioned before, which Daniel (lostintransit.se) and I started way back.
Im also going through the INE scenarios as well as LiveLessons available through a Safari subscription. Those are really good and I highly recommend them.
One of the primary things im practicing at the moment is picking up business requirements from a given scenario. This is quite hard as im at heart an implementation-focused guy. But its good to learn something new and very useful.
If you are not following it just yet, I can highly recommend the “Unleashing CCDE” site on Cisco Learning Network (https://learningnetwork.cisco.com/blogs/unleashing-ccde). There are alot of good posts there on how to pick up these “soft” skills.
I will keep the blog updated with my study progress through February and we’ll see what happens February 22nd 
Take Care.
/Kim
Device Configurations Are Not a Good Source of Truth
One of my subscribers sent me this question after watching the second part of Network Automation Tools webinar (or maybe it was Elisa Jasinska's presentation in the Data Center course):
Elisa mentions that for a given piece of data, there should be “one source of truth”. It gets a bit muddled when you have an IPAM tool and Git source control simultaneously. It is not hard to imagine scenarios where these get out of sync especially if you consider multi-operator scenarios.
Confused? He provided a simple scenario:
Read more ...Big Changes in 2017
This past June when I was in North Carolina at Cisco's CPOC lab, I learned that there was a chance-albeit a slim one, but a chance nonetheless-that a position would be opening up on the CPOC team in the fall. By that point I had been to CPOC three times and knew many of the engineers who worked there. I spoke to them to get their feedback, met with the newly-hired manager of the team, and just generally did all the things I thought I should be doing to take advantage of my time being face to face with these folks.Reset phpipam admin password
How to reset admin password for phpipamMigrate phpipam to new server
How to migrate phpipam data to new severA Postscript to the Leap Second
The inexorable progress of time clocked past the New Year and at 23:59:60 on the 31st December 2016 UTC the leap second claimed another victim. This time Cloudflare described how the Leap Second caused some DNS failures in Cloudflare’s infrastructure. What's going on here? It should not have been a surprise, yet we still see failing systems.After Two Years, Do I Find Self-Employment Worthwhile?
In March 2015, I started working for myself exclusively. That is to say, I went from working for someone else full-time while also operating my own company full-time to working strictly for my own company. How am I feeling after nearly two years of self-employment?
Fulfillment
Working for myself has proven to be fulfilling. I like the correlations to be found among opportunity, effort, risk, reward, and failure. I can weigh all of those things, make a decision of how to proceed, and benefit (or suffer) directly in accordance with my decisions. That is fulfilling to me.
Suffering, by the way, isn’t a bad thing. We could all stand to do a bit more of it today, so that we do a bit less of it tomorrow.
Process
I am free of silly processes that cripple my ability to get things done, not that I believe process is inherently bad. With my own company, I still have to define processes, but I can keep them both streamlined and fluid. I’m also free to let the people that work with me define their own processes, with me providing only the input required to achieve the desired result.
Balance
When working for other employers as an IT professional, Continue reading
Response: Proposed server purchase for GitLab.com | GitLab
Gitlab is talking about heading into the private cloud after successfully building a cloud-ready application. The savings are substantial for a small, technology-rich company:
The cloud hosting for GitLab.com excluding GitLab CI is currently costing us about $200k per month. The capital needed for going to metal would be less than we pay for 1 quarter of hosting. The hosting facility costs look to be less than $10k per month. If you spread the capital costs over 2.5 years (10 quarters) it is 10x cheaper to host your own. (My emphasis)
This sounds about right but I don’t think this factors in head count for operating the physical infrastructure. Lets say that two extra FTEs at $15K per month are required, this still one third the cost of AWS. The reaility is $2.4MM is a substantial yearly budget for IT Infrastructure and for an application that already cloud-ready it would go a very long way
For a small company that is focussed on technology adding more headcount is good for capacity. In a team of ten people, adding 2 headcount increases diversity of thinking, ideas and approaches and can be important to spreading out the workload e. Continue reading
Iran Leaks Censorship via BGP Hijacks
Last week, we reported via Twitter that the Iranian state telecom TIC hijacked address space containing a number of pornographic websites. The relevant BGP announcement was likely intended to stay within the borders of Iran, but had leaked out of the country in a manner reminiscent of Pakistan’s block of Youtube via BGP hijack in 2008. Over the weekend, TIC performed BGP hijacks of additional IP address space hosting adult content as well as IP addresses associated with Apple’s iTunes service.
Iranian state telecom hijacking IP space that is hosting adult websites. Censorship leaking out of Iran? #bgphijack pic.twitter.com/t4XTLnQhIS
— Dyn Research (@DynResearch) January 6, 2017
In addition, in 2015 on this blog we reported that a new DNS root server instance in Tehran was being leaked outside Iran, a situation that was quickly rectified at that time. Despite the fact that the Tehran K-root is intended to only be accessible within Iran, as we will see below, it is currently being accessed by one of the largest US telecommunications companies.
Iranian BGP-based Censorship
Last week, Iranian state telecom announced a BGP hijack of address space (99.192.226.0/24) hosting numerous pornographic websites. Continue reading