So much for going public.
Virtual Firewalls is the featured webinar in June 2016, and the featured videos (marked with a star) explain the difference between virtual contexts and virtual appliances, and the virtual firewalls taxonomy.
To view the videos, log into my.ipspace.net (or enroll into the trial subscription if you don’t have an account yet), select the webinar from the first page, and watch the videos marked with star.
If you're a trial subscriber and would like to get access to the whole webinar, use this month's featured webinar discount (and keep in mind that every purchase brings you closer to the full subscription).
Our week begins in Brussels, where we announce our newest data center. This is our 23rd data center in Europe alone, and our 81st data center globally - providing additional redundancy to nearby facilities in Amsterdam and Paris.
Millions of websites using CloudFlare are now faster in Brussels, and we are excited to exchange traffic at the Belgium National Internet Exchange (BNIX).
Brussels - which hosts several strategic European institutions such as the European Commission and the Council of the European Union - is home to over 40,000 EU employees. With the turn up of our Brussels data center, they join the rest of the country in experiencing a faster Internet. Impressively, close to 90% of Belgium's citizens are online.
We will be announcing two more data centers this week - each in one of the world’s most populous countries. Could you guess which ones?
BGP As-path is a mandatory BGP attribute which has to be sent in every BGP message. BGP as-path prepending is one of the BGP traffic engineering methods which will be explained in detail throughout this post. Outline: What is BGP As-path attribute ? Why BGP as-path attribute is used ? What is BGP as-path prepending […]
The post BGP As-path prepending – Use cases, Alternatives and Challenges appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Put your detective hat on your head and your Network Detective badge on your lapel. It is time for the Case of the Failed IPv6 Ping.
Part #1 – We hit the crime scene together and we work methodically together to
Part #2 – I give you what the problem ended up being.
Ready? Let’s PLAY!
It all started when I was going to do a post on IPv6 Multicasting. I grabbed 3 ASR1K and got them all prepped: cards, code, cables, configurations. Name the routers R1, R2, and R3. Add a couple Spirent TestCenter ports for traffic and sniffing , configure them, and we are good to go.
Time for “pre-flight check”, as it were.
Oh… crap… that didn’t work.
Let’s go to the active crime scene!
Well that didn’t work did it? Let’s check the routing table on R3.
From R3’s IPv6 routing table we see
I had Hadoop experience now for more than a year, thanks to a great series of Cloud Computing courses on Coursera.org, now after ~6 months of running via several cloud systems, I finally have time to put down some of my more practical notes in a form of an article here. I will not go much into theory, my target here would be to help someone construct his first small Hadoop cluster at home and show some of my amateur “HelloWorld” code that will count all words in all works of W. Shakespeare using the MapReduce. This should leave with with both a small cluster and a working compilation project using Maven to expand on your own later …
What I have used for my cluster is a home PC with 32G of RAM to run everything inside using vmWare Workstation. But this guide is applicable even if you run this usingVirtualBox, physical machines, or using virtual machines on some Internet cloud (e.g. AWS/Azure). The point will simply be 4 independent OS linux boxes that are together one a shared LAN to communicate between each other.
For this one there is not much to say Continue reading
So in the last blog I essentially looked at one of the most basic aspects of EVPN – a multi-site layer-2 network with nothing fancy going on, with traffic forwarding occurring between multiple sites in the same VLAN. The fact of the matter is that there was nothing going on there that you couldn’t do with a traditional VPLS configuration, however the general idea was to demonstrate the basics and take a look at the basic control-plane first.
In this update we’ll be looking at some of the more exclusive and highly useful aspects of EVPNs which make it a very attractive technology for things such as data-centre interconnect, there are a few things which are possible with EVPN which cannot be done with VPLS.
Consider the revised topology:
It’s the same topology from the first blog post, however I’ve simply added an additional VLAN (VLAN 101) to ge-0/0/22 of each EX4200 LAN switch, and an additional IXIA host.
For this post we’re going to look at a rather cool way of performing inter-VLAN forwarding between hosts in VLAN100 and VLAN101. Not that I want to spend time teaching people how to suck eggs, but generally in a simple network Continue reading
Compute is by far still the largest part of the hardware budget at most IT organizations, and even with the advance of technology, which allows more compute, memory, storage, and I/O to be crammed into a server node, we still seem to always want more. But with a tighter coupling of flash in systems and new memories coming to market like 3D XPoint, the server is set to become a more complex bit of machinery.
To try to figure out what is going on out there with memory on systems in the real world and how future technologies might affect …
Systems To Morph As Memory Options Expand was written by Timothy Prickett Morgan at The Next Platform.
“Hey Fish, how good are you at BFD? None of my BFD neighbors will come up.” Two simple sentences and I am “hooked.” I love troubleshooting! Troubleshooting is just a blast for me! It’s like being a Network Detective trying... Read More ›
The post Network Detective Series: Troubleshooting Method Ride-A-Long appeared first on Networking with FISH.