Category: podcast

A few days after the Networking Field Day 9 event Nick Buraglio organized a virtual meetup with Brandon Carroll, Brandon Mangold, Bob McCouch and myself, and we discussed the presentations from NEC, Cumulus, Cisco and Brocade. Nick recorded the conversation and so Episode 26 of Software Gone Wild was born.

Achieving 40 Gbps of forwarding performance on an Intel server is no longer a big deal - Juniper got to 160 Gbps with finely tuned architecture - but can you do real-time optimization of a million concurrent TCP sessions on that same box at 20 Gbps?

Juho Snellman from Teclo Networks explained how they got there in Episode 25 of Software Gone Wild… and you’ll learn a ton of things about radio networks on the way.

Enjoy the show!

Even though I wrote about the challenges of routing from VXLAN VNI to VLAN segment on a certain popular chipset a while ago, many engineers obviously still find the topic highly confusing (no surprise there, it is).

Maybe a video is worth a thousand words ;) – I published the part of recent VXLAN webinar where I described the issue in as many details as I could.

How many times have you received exact specifications of the traffic the e-commerce platform you have to deploy will generate? How do you buy a load balancer (application delivery controller in marketese) to support that (somewhat unknown) amount of traffic? In most cases, you buy a box that’s several times too big for the traffic the site is receiving most of the time, and still crashes under peak load.

A week or so ago I described why a properly implemented hypervisor-based overlay virtual networking data plane is not a scalability challenge; even though the performance might decrease slightly as the total number of forwarding entries grow, modern implementations easily saturate 10GE server uplinks.

Scalability of the central controller or orchestration system is a totally different can of worms. As I explained in the Scaling Overlay Networks, the only approach that avoids single failure domain and guarantees scalability is scale-out control plane architecture.

Want to know even more about Tail-F NCS after listening to Episode 22 of Software Gone Wild? Boštjan Šuštar and Marko Tišler from NIL Data Communications continue their deep dive into the secrets of NCS in Software Gone Wild Episode 23.

Tail-F NCS implements one of the most realistic approaches to service abstraction (the cornerstone of SDN – at least in my humble opinion) – an orchestration system that automates service provisioning on existing infrastructure.

Is the product really as good as everyone claims? How hard is it to use? How steep is the learning curve? Boštjan Šuštar and Marko Tišler from NIL Data Communications have months of hands-on experience and were willing to share it in Episode 22 of Software Gone Wild.

“Thou Shalt Have No Chokepoints” is one of those simple scalability rules that are pretty hard to implement in real-life products. In the Distributed Data Plane part of Scaling Overlay Networks webinar I listed data plane components that can be easily distributed (layer-2 and layer-3 switching), some that are harder to implement but still doable (firewalling) and a few that are close to mission-impossible (NAT and load balancing).

Late last year David Gee and I wanted to test another interesting gizmo: an online virtual whiteboard. David was pondering some interesting aspect of Cisco ACI and they seemed like a perfect topic for an impromptu discussion.

When we started planning a VMware NSX-focused podcast episode with Dmitri Kalintsev, I asked my readers what topics they’d like to see covered. Two comments that we really liked were “how do I get started with VMware NSX?” and “how do I troubleshoot this stuff?”

Last spring I ran an IPv6 High Availability webinar which started (not surprisingly) with a simple question: “which network components affect availability in IPv6 world, and how is a dual-stack or an IPv6-only environment different from what we had in the IPv4 world?”

This part of the webinar is now available with Free Subscription. Enjoy the video, and don't forget to explore other IPv6 resources on ipSpace net.

Load sharing in MPLS networks is always an interesting topic, and we couldn’t possibly avoid it during our MPLS-focused Tech Talks – watch the video.

After discussing the load sharing intricacies we briefly dabbled with the concept of entropy labels.

Imagine you need a data center WAN edge router with multiple 10GE uplinks. You’d probably go for an ASR or a MX-series router, right? How about using a 2 Tbps ToR switch and an SDN solution to make it work with full Internet routing table?

If you happen to have iTunes on your computer, please spend 10 seconds rating the podcast before you start listening to it. Thank you!

One of the interesting challenges in the Software-Defined Data Center world is the integration of network and security services with the compute infrastructure and network virtualization. Palo Alto claims to have tightly integrated their firewalls with VMware NSX and numerous cloud orchestration platforms - it was time to figure out how that’s done, so we decided to go on a field trip into the scary world of security.

Highly customizable high-speed virtual switch written in Lua sounds great, but is it really that easy to use? Simon Leinen was kind enough to get me in touch with Alex Gall, his colleague at Switch, who's working on an interesting project: implementing L2VPN over IPv6 with Snabb Switch.