Happy Tenth Anniversary Arista Networks!
Every year at Arista has been filled with milestones and enriching memories. I want to acknowledge and thank each and every Arista well-wisher for contributing to this incredible experience. So let’s take a walk together down memory lane and look back on our journey from start-up to a now public company. I think of Arista’s first decade as being comprised of three phases:
2004+ Our Humble Beginnings:
Funded in a unique fashion, without traditional venture capital investment, Arista (first called Arastra, located on Arastradero road in Palo Alto) was placed in a unique position. Our founders, Andy and David, were our funders, too, and they cared deeply about building the company with the right technology foundation. Ken Duda, also a founder and our EOS software genius, brought a radical, resilient and programmable network-OS for modern, disruptive applications. Bringing some of the best and brightest engineering minds together resulted in an innovative network-wide operating system that challenged legacy enterprise switching vendors. Andy Bechtolsheim and I launched the company officially in October 2008. With just 50 engineers we gained 50 customers by the end of 2008, proving what small focused teams could accomplish. Our early adopters welcomed us as a breath of Continue reading
Show 210 – SPB Implementation Fundamentals
Dominik and Ricki Cook join Packet Pushers Greg Ferro and Ethan Banks in a hands-on exploration of Shortest Path Bridging, IEEE 802.1aq. Most of us have had our hands on Avaya gear that does SPB — Ethan in the lab, and Dominik + Ricki in production environments. We go through the basic goals, setup, and commands […]
Author information
The post Show 210 – SPB Implementation Fundamentals appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Retro installation wizard
Just upgrading my soundcard drivers to some newer ones that were issued in 2012, and the wizard they use for this appears to be from 1995!
20-year-old graphics!
Ruckus Wireless User? Here’s your OS X Yosemite Warning.
A quick post today. As you may recall, I run two Ruckus Wireless APs at home – a Zoneflex 7982 AP and a Zoneflex 7363 AP managed by a Zone Director 1106. The ZF7982 and ZD1106 were provided courtesy of Ruckus … Continue reading
If you liked this post, please do click through to the source at Ruckus Wireless User? Here’s your OS X Yosemite Warning. and give me a share/like. Thank you!
Take a break and watch two recent engineering talks
Recently, I spoke at the dotGo 2014 conference in Paris and my colleague (and creator of OpenResty) Yichun Zhang spoke at the first NGINX conference in San Francisco.
If you need to take a break, go grab a drink and enjoy one of these two talks.
The Latest and Greatest from ngx_lua: New Features & Tools
Tired of writing NGINX C-modules or setting-up back-end application servers? The ngx_lua module was created to save time and pain, while opening up new possibilities in the world of NGINX. The ngx_lua module embeds the Lua dynamic language into the NGINX core, turning NGINX into a highly scriptable proxy server. Many use it as a non-blocking full-stack web application server as well--also known as OpenResty.
Led by ngx_lua co-creator and sole-maintainer, CloudFlare’s Yichun Zhang, this presentation will introduce all the latest features implemented in the ngx_lua module as well as other new tools. Yichun will focus on features including: light threads, websockets, timers, NGINX worker initialization hooks, SSL/TLS coroutine-based sockets (or “cosockets”), full-duplex cosockets and more.
. .
The session wraps-up covering new advanced tools to troubleshoot and profile ngx_lua-based systems including dynamic tracing utilities based on Systemtap and GDB extension commands.
I came for the Continue reading
The Power of Correlated Visualization
I am sure our work environment is not all that different from many others. There are large whiteboards everywhere and you cannot find a meeting room that does not have circles, lines and squares drawn on them. Some of our favorite bloggers have written blogs about network drawing tools and aids. Probably not restricted to just networking folks, but we certainly love to visualize the things we do. Out of all the customers I have visited, the amount of them where one of us did not end up on a whiteboard can probably be counted on one hand.
It is not surprising that we are drawn to diagrams of the networks we have created. We build our network one device at a time, then use network links to connect the next and on we go until our network is complete. Which of course it never is. To track how we have connected all our devices we need diagrams. They tell us what devices we have, how they are attached to each other, how they are addressed and what protocols we have used to govern their connectivity. They are multi layered and the layers are semi independent.
I have previously said Continue reading
Overlay-to-Underlay Network Interactions: Document Your Hidden Assumptions
If you listen to the marketing departments of overlay virtual networking vendors, it looks like the world is a simple place: you deploy their solution on top of any IP fabric, and it all works.
You’ll hear a totally different story from the physical hardware vendors: they’ll happily serve you a healthy portion of FUD, hoping you swallow it whole, and describe in gory details all the mishaps you might encounter on your virtualization quest.
The funny thing is they’re all right (not to mention the really fun part when FUDders change sides ;).
Read more ...MTR style traceroute on Juniper
Having used MTR on my mac and on Linux system I was always frustrated with the lack of this option from the Junos CLI. You have always been able to start a shell and run MTR as below:- nick@ScoobyDoo> start … Continue reading
Junosphere Bugbears
I’ve always thought Junosphere was great, and it certainly makes setting up test scenarios really really easy. However there are a few things that really niggle when using it. They don’t seem to be getting much better, which makes me wonder if there’s much development work going on with the platform. Messages to the “junosphere-contactme” email address given get no reply.
Anyway, here’s the list of niggles:
1. Sometimes MXes start up with their management IP address in the wrong place – see this post.
2. If you have a saved set of configs for Junosphere which you import from your hard disk, it doesn’t create a network diagram.
3. Topmost annoyance: every time you start up your topology the routers get different IP addresses. Argh.
4. To edit a predefined config for a device, you have to stop the whole topology. This makes setting up topologies for training courses quite a laborious process because the routers take such a long time to start up and shut down while you try to get the base config right.
5. It would be really nice to have the IP addresses and console addresses as hyperlinks you could Continue reading
How to install HP VAN SDN Controller on vanilla Ubuntu 12.04.5 LTS?
Dear HPN Community, Everyone wants to learn more around Software-Defined Networking. In order to make installation of controller really simple with only one command my colleague Shiraz Qureshi made awesome script. Shiraz shared location of the script on our GitHub … Continue reading
Great new information sources I learned
Dear HPN Community, Hope you all think that abouthpnetworking.com is providing good information. But there is always more . . . Today I learned some great new information sources from my colleague Chris Young. First web site is: http://www.wookieware.com/ This … Continue reading
MXes in Junosphere
MXes in Junosphere are unsupported, but I tend to use them because I want something a bit closer to the real thing somehow. The VJX is ok, but I like the way the MX doesn’t come with any security-related stuff, and the interfaces start at ge-0/0/0 rather than ge-0/0/1!
The only downside with the virtual MX is that it is a non-supported image, unlike the VJX.
Sometimes when usign an VMX, you find that the topology starts up but you can’t SSH to one or two of the nodes. So you console onto it and discover that (for some reason) the management IP address has been put onto em0 rather than being where it should be in the member0 group applied to fxp0:
root@S1> show configuration groups member0
system {
host-name S1;
backup-router 10.233.255.254;
}
interfaces {
fxp0 {
unit 0 {
family inet; <=== IP address missing!
}
}
}
root@S1> show configuration interfaces em0
unit 0 {
family inet {
address 10.233.248.46/20; <== Here it is.
}
}
The solution to this is to console onto the device and move Continue reading
f5 Health Monitors – More Surprises
Not content with digging into the A10 health monitors recently, I thought I should do the same for f5 LTM which has some slightly different setting and, it turns out, works really quite differently. I hate to say it again, … Continue reading
If you liked this post, please do click through to the source at f5 Health Monitors – More Surprises and give me a share/like. Thank you!
Simple bridging on MX
I’m doing some studying using Junosphere at the moment, but unfortunately Junosphere can’t emulate a LAN at the moment. Basically the same problem that GNS3 has and (as far as I know) Cisco’s VIRL/CML has as well. So you’ve got to bodge it with Integrated Routing and Bridging (IRB). What I needed topology-wise was this:
LAN segment between S1, R1 and R2
I find Junos a bit counter-intuitive when creating bridge domains. Here I need something quite simple – two ports in a bridge group (no VLANs or anything), but I need to give a VLAN tag value to identify the bridge domain.
Anyway, the process for doing this is as follows:
1. Give the physical interfaces the right encapsulation type – ethernet-bridge
2. Create a bridge domain which has a VLAN-ID and references these two interfaces
3. Create an IRB interface (irb.10) with family inet and an IP address on it
4. In the bridge domain, use “routing-interface irb.10″ to tie the bridge domain and the IP interfaces together.
The result is this:
IRB solution for LAN
The configuration I used was this:
root@S1# show interfaces
ge-0/0/0 {
description "to R1 0/0/1";
Continue reading
Blessay: Over-Capitalized and Under-Invested in Human Infrastructure
LEDE: One of the hardest parts of DevOps movement is explaining the unique value to IT Leadership in conventional organisations that rely on ITIL principles. I'm having success by framing the debate in terms of over-capitalised on assets and under-invested in human infrastructure.
The post Blessay: Over-Capitalized and Under-Invested in Human Infrastructure appeared first on EtherealMind.
Understanding IPv6: The Ping Before Solicited-Node Multicast
Denise Fishburne gets ready to walk through solicited-node multicast, analyzing an ICMP ping echo request in IPv4 and showing how it differs from IPv6.Bad Ideas and Abominations
This post SHOULD have been published on April 1st, but I need to define the terminology for another upcoming post, so here it is ;)
RFC 2119 defines polite words to use when something really shouldn’t be done. Some network designs I see deserve more colorful terminology.
2014-11-02: Updated with reference to RFC 6919 (/HT to @LapTop006)
Read more ...Small Business Gets Big Wi-Fi, Finally!
In a wireless world that’s so dependent on reliable connectivity, there’s something small business owners will tell you: Wi-Fi for small businesses really stinks. The small business sector is one of today’s most underserved and overlooked markets, and the opportunity...GNS3 1.1
I was never a big fan of GUI tools, so I used dynagen and dynamips for my network designs. But since 15.2 was the last version released for 7200, dynamips is no longer useful (especially for IKEv2 and OSPFv3 stuff)
I was hoping that Cisco would release VIRL, and they promised to do so for the past year and a half, but it looks like it will never come. Shelling out 10K$ for CML (the payed version of VIRL) is a bit too much for most of us. But there is a good alternative:
Not long time ago GNS3 version 1.0 was released and soon after version 1.1. was released too. And after long time of being a backer for their funding campaign I have decided to try GNS3 with IOU.
After installing GNS3 on both linux and windows (vmware required), I found that GNS3 is really easy to use, and that IOU is AMAZING. IOU is sooooo fast, and everything just works(tm). I wish I had it years ago!
Goodbye dynamips and dynagen, and thank you so much.
Hello IOU and GNS3. I know it will be a start of a wonderful friendship :)
JNCIE study lab setup.
Boom – you’ve got to love Junosphere. I just created the Proteus JNCIE study lab in 35 minutes flat. I made the topology of 13 routers, gave everything a hostname, loopback and interface descriptions and then just fired it up. When I did my CCIE I was there for >weeks< trying to get the right kit plugged together!
Have a look below:
