Whenever there’s a weird request to do something totally illogical with BGP, there’s a knob in Cisco IOS to get it done (and increase the heartburn of CCIE candidates). Conditional Route Injection (the ability to insert more specific prefixes into BGP without having them in the IP routing table) is one of them.
Keep in mind: being a MacGyver is not a long-term strategy. Just because you can doesn’t mean that you should.
Read more ...Every year I reflect upon how my predictions compare to actual outcomes. Once again, that time has come, so let’s take a walk together down 2014’s memory lane, while also looking forward to exciting industry developments in 2015. Clearly innovation in networking is returning as we are seeing venture capitalists once again investing in networking innovation!
Prediction #1: The rise in server virtualization is driving network virtualization deployments.
Evaluation #1: Half True.
One can transcend network boundaries at both L2 and L3, building seamless virtual and physical networks with VXLAN as the key L2 over L3 foundation. The VXLAN specification co-authored by Arista and VMware, and in a similar vein the NVGRE specification co-authored by Arista and Microsoft, were key turning points for network virtualization. Arista’s strategic partnership announced in August 2014 with VMware (NSX, vSphere and vCloud Director) and multivendor interoperability with other controllers from Nuage Networks, OpenStack and the OpenFlow community were key milestones in 2014. New protocols take time to be adopted – usually 3-5 years. VXLAN is at that tipping point for broader implementations in place of the proprietary, vendor-specific options we have seen.
Prediction #2: “SDN” is no more “Still Don’t Know”.
Evaluation #2: Continue reading
The blog migration is finally complete! It’s taken quite a while, but I’ve finally managed to migrate the over 1,600 posts from my original WordPress installation over to Jekyll hosted on GitHub Pages. I’ll have another post later that goes into more detail on the process that I followed (and why) as well as some of the tools that I used in the migration.
As of right now, there are 2 outstanding issues:
While all the content is here, what’s not here is the comments (yet). I’m still working through some issues with Disqus, but I hope to have the issues resolved soon.
Also, depending on when you read this, my original domain (“blog.scottlowe.org”) may or may not be working with the new content.
I appreciate your patience as I work through these issues.
I’d also appreciate it if you could let me know if you find anything that’s not working, such as links to other blog posts, code listings, images, etc. Because this entire site is a GitHub repo, if you’re so inclined you’re welcome to clone the repo, fix the problems, and submit a pull request. If you don’t feel like doing that, just drop me Continue reading
Newsletters are a crucial tool of online marketing; get yours right and your audience will pay attention to you and whatever you’re trying to promote. Get it wrong and if you’re lucky people will just route your newsletter straight to the trash. If you really goof up, you’ll be swamped with abuse and unsubscribe requests. So, to help keep you on the path of digital righteousness here's a selection of the best ways for you to screw up your newsletter:
#1. Be boring. This is the simplest path to a failed newsletter. To really be boring ensure that your newsletter is in plain text, short, minimally formatted, and contains absolutely no graphics.
To read this article in full or to leave a comment, please click here
Ben Pfaff, Justin Pettit, and Ethan Jackson are core contributors to the Open vSwitch (OVS) project. What’s OVS? OVS is a virtual switch that’s growing in popularity as an open source vSwitch. The more you dig into open source networking projects, the more you see OVS showing up. One of the OVS gotchas in the past has […]
The post Show 219 – Open vSwitch Obtains Ludicrous Speed appeared first on Packet Pushers Podcast and was written by Ethan Banks.
lab-catalyst#show spanning-tree mst configuration
Name [lab]
Revision 3 Instances configured 4
Instance Vlans mapped
-------- ---------------------------------------------------------------------
0 4-9,40-99,101-199,201-299,301-4094
1 1,10-19,100
2 2,20-29,200
3 3,30-39,300
-------------------------------------------------------------------------------
lab-catalyst#show spanning-tree mst configuration digest
Name [lab]
Revision 3 Instances configured 4
Digest 0x37D94E0098E3418C046F217A71077FB1
Pre-std Digest 0xFC2190275BBB19CD9A6F1BB116DB10E7
lab-catalyst#
lab-procurve# show spanning-tree mst-config
MST Configuration Identifier Information
MST Configuration Name : different
MST Configuration Revision : 4
MST Configuration Digest : 0x37D94E0098E3418C046F217A71077FB1
IST Mapped VLANs : 4-9,40-99,101-199,201-299,301-4094
Instance ID Mapped VLANs
----------- ---------------------------------------------------------
1 1,10-19,100
2 2,20-29,200
3 3,30-39,300
lab-procurve#
Ansible's VP of Community, Greg DeKoenigsberg, compiled a nice statistical look back at our 2014.
Here is a nice example of Ansible's growth on GitHub:
Read the full post on Greg's blog.
Automation is going to be fundamental in all networking products. I’ve been working a lot on integrating Juniper products in existing and standard software. There are many different ways to automate something on a network running Junos. Using REST (or RESTful) APIs is one way of doing this. The reason I’m using REST is that it’s fairly easy to understand, but the best thing is that a large amount of existing products supports REST to integrate with it.
The goal of this blog is to explain how Junos products support REST, compatibility with older versions and how it scales.
REST (REpresentational State Transfer) is a simple stateless architecture that generally runs over HTTP. There are 4 commonly supported commands. When you issue a command your input data consists of a URL, HTTP headers and a body holding the data.
HTTP Headers are used for things like Authentication and a Content Type to let the application know what data format the body will contain.
The URL specifies which data you want to receive from the application or you want to change.
The body is empty in a request for data, when you want to change some data this Continue reading
This post is the first in a series I plan to publish over the next few months regarding frequently asked questions in networking. Each post will cover a different subject, roughly following the outline I shared last summer. I hope people find this useful!
Original content from Roger's CCIE Blog Tracking the journey towards getting the ultimate Cisco Certification. The Routing & Switching Lab Exam
In this ever advancing world of technology there has never been a better time to be able to get things done anywhere, but there has also never been so many distractions stopping you getting things done. With the constant connectivity to the internet, facebook, twitter, etc etc we are now absorbing more information every hour... [Read More]
Post taken from CCIE Blog
Original post The Most Important Skill to learn for 2015
The cyberterrorists who hacked Sony Pictures Entertainment’s computer servers have threatened to attack an American news media organization, according to an FBI bulletin obtained by The Intercept.
On 20 December, the GOP posted Pastebin messages that specifically taunted the FBI and USPER2 for the "quality" of their investigations and implied an additional threat. No specific consequence was mentioned in the posting.Which was refering to this pastebin with the vague threat:
P.S. You have 24 hours to give us the Wolf.Today, @DavidGarrettJr took credit for the Pastebin, claiming it was a hoax. He offered some evidence in the form of the following picture of his browser history:
Welcome to a new year finally divisible by five! This is a year devoid of extra February days, Olympics, or anything else. It’s a chance for us to take a look at technology and make things better and easier for users and IT staff. It’s also probably going to be called the year of VDI, NFV, and SDN. Again.
Rather than writing a wrap up post for the end of 2014 like so many other sites, I like to look at what I said I was going to do 365 days ago and see if I followed through on them. It’s a way to keep myself honest and also to see how the year transformed around me and my goals.
Thankfully, my goals for 2014 were modest. I wanted to get more involved with the people in the IT industry. And I did that in a big way. I went to a ton of conferences and events through the year. Cisco Live, VMworld, and HP Discover Barcelona were all on my list this year, as well as all of the Tech Field Day events I took part in as an organizer. It was a grand Continue reading