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The Final Journey Of Full Stack Journey

The Full Stack Journey is coming to an end. After five years and more than 80 episodes of deeply technical conversations about technologies, tools, and career journeys, this is the final episode of the series. I reflect on my time hosting the podcast, the challenges and pleasures of putting together a show, lessons and insights from all the conversations I've had, thoughts on the state of IT and technology, and what comes next.

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How to use the nohup command

In this episode, Sandra Henry-Stocker, author of the "Unix as a Second Language" blog on NetworkWorld, explores the use of the "nohup" (no hangup) command in Linux.

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BrandPost: Data is at the heart of your business success

The data circulatory system Data is the lifeblood of enterprise, flowing vital information through a network of IT veins and arteries to deliver resources exactly where they are needed. Like how innovations in medicine and nutrition have changed the way we live, advanced technologies like IoT, AI, machine learning, and increasingly sophisticated applications are necessitating change in where and how data lives and is processed. To read this article in full, please click here

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Cisco and Aviz coordinate support for enterprise SONiC networks

Cisco is teaming with Aviz Networks to offer an enterprise-grade SONiC offering for large customers interested in deploying the open-source network operating system.Under the partnership, Cisco’s 8000 series routers will be available with Aviz Networks’ SONiC management software and 24/7 support. The support aspect of the agreement may be the most significant portion of the partnership, as both companies attempt to assuage customers’ anxiety about supporting an open-source NOS.While SONiC (Software for Open Networking in the Cloud) is starting to attract the attention of some large enterprises, deployments today are still mainly seen in the largest hyperscalers. With this announcement, Cisco and Aviz are making SONiC more viable for smaller cloud providers, service providers, and those very large enterprises that own and operate their own data centers, said Kevin Wollenweber, senior vice president and general manager with Cisco networking, data center and provider connectivity.To read this article in full, please click here

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Cisco and Aviz coordinate support for enterprise SONiC networks

Cisco is teaming with Aviz Networks to offer an enterprise-grade SONiC offering for large customers interested in deploying the open-source network operating system.Under the partnership, Cisco’s 8000 series routers will be available with Aviz Networks’ SONiC management software and 24/7 support. The support aspect of the agreement may be the most significant portion of the partnership, as both companies attempt to assuage customers’ anxiety about supporting an open-source NOS.While SONiC (Software for Open Networking in the Cloud) is starting to attract the attention of some large enterprises, deployments today are still mainly seen in the largest hyperscalers. With this announcement, Cisco and Aviz are making SONiC more viable for smaller cloud providers, service providers, and those very large enterprises that own and operate their own data centers, said Kevin Wollenweber, senior vice president and general manager with Cisco networking, data center and provider connectivity.To read this article in full, please click here

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Introducing notifications for HTTP Traffic Anomalies

When it comes to managing Internet properties, the difference between a small technical hiccup and major incident is often a matter of speed. Proactive alerting plays a crucial role, which is why we were excited when we released HTTP Error Rate notifications — giving administrators visibility into when end users are experiencing errors.

But what if there are issues that don't show up as errors, like a sudden drop in traffic, or a spike?

Today, we're excited to announce Traffic Anomalies notifications, available to enterprise customers. These notifications trigger when Cloudflare detects unexpected changes in traffic, giving another valuable perspective into the health of your systems.

Unexpected changes in traffic could be indicative of many things. If you run an ecommerce site and see a spike in traffic that could be great news — maybe customers are flocking to your sale, or you just had an ad run on a popular TV show. However, it could also mean that something is going wrong: maybe someone accidentally turned off a firewall rule, and now you’re seeing more malicious traffic. Either way, you might want to know that something has changed.

Similarly, a sudden drop in traffic could mean many things. Perhaps Continue reading

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Forwarding BUM Frames in VXLAN Network With Static Ingress Replication

In the last post we used multicast to forward BUM frames. In this post, static ingress replication is used which removes the requirement for multicast in the underlay. Before setting this up, let’s do a comparison of multicast vs ingress replication. To make this interesting, let’s use a larger topology consisting of 2 Spines and 32 Leafs:

Assume that all Leafs have the same VNIs. In a scenario with multicast, Leaf-1 sends for example an ARP request encapsulated in multicast towards Spine-1. This is a single frame. Spine-1 then replicates this frame and sends it on all its links towards the Leafs:

This is very efficient as a single frame is sent by Leaf-1 and then 31 copies are sent on the other links to the Leafs. If the ARP request is 110 bytes, then a total of 32 x 110 = 3520 bytes have been consumed to send this ARP request. This is optimal forwarding from a resource consumption perspective and one of the strengths of multicast. Now let’s compare that to ingress replication. With ingress replication, Leaf-1 sends 31x copies of the frame (with different destination IP) towards Spine-1. Spine-1 then forwards those frames on each link towards Continue reading

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Tech Bytes: Nokia’s ChatGPT App Lets Engineers Query The Network (Sponsored)

AI is making its way into network operations, and on today’s episode, sponsored by Nokia, we talk about how Nokia has developed a ChatGPT-based application that runs on its SR Linux network OS. Network engineers can use this app to query about network state, ask troubleshooting questions, check configurations, search logs, and quickly sort through reams of documentation.

The post Tech Bytes: Nokia’s ChatGPT App Lets Engineers Query The Network (Sponsored) appeared first on Packet Pushers.

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Tech Bytes: Nokia’s ChatGPT App Lets Engineers Query The Network (Sponsored)

AI is making its way into network operations, and on today’s episode, sponsored by Nokia, we talk about how Nokia has developed a ChatGPT-based application that runs on its SR Linux network OS. Network engineers can use this app to query about network state, ask troubleshooting questions, check configurations, search logs, and quickly sort through reams of documentation.

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Network Break 453: Cisco Invests In Quantum Networking; SmartNIC Sales Surge; Intel Unplugs Another Business

Today's episode includes Cisco patching a critical vulnerability affecting IOS-XE gear, startup Prosimo releasing a cost calculator to help network engineers track their public cloud networking costs, and Juniper integrating its SD-WAN to the AWS cloud WAN. We also cover Cisco's investment in a quantum networking startup, growing DPU sales, and Intel divesting from pluggable optical modules.

The post Network Break 453: Cisco Invests In Quantum Networking; SmartNIC Sales Surge; Intel Unplugs Another Business appeared first on Packet Pushers.

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NB453: Cisco Invests In Quantum Networking; SmartNIC Sales Surge; Intel Unplugs Another Business

Today's episode includes Cisco patching a critical vulnerability affecting IOS-XE gear, startup Prosimo releasing a cost calculator to help network engineers track their public cloud networking costs, and Juniper integrating its SD-WAN to the AWS cloud WAN. We also cover Cisco's investment in a quantum networking startup, growing DPU sales, and Intel divesting from pluggable optical modules.

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Weird: vJunos Evolved 23.2R1.5 Declines DHCP Address

It’s time for a Halloween story: imagine the scary scenario in which a DHCP client asks for an address, gets it, and then immediately declines it. That’s what I’ve been experiencing with vJunos Evolved release 23.2R1.15.

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Weird: vJunos Evolved 23.2R1.5 Declines DHCP Address

It’s time for a Halloween story: imagine the scary scenario in which a DHCP client asks for an address, gets it, and then immediately declines it. That’s what I’ve been experiencing with vJunos Evolved release 23.2R1.15.

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Top Tips for a Strong Zero Trust Architecture

A zero trust architecture reduces a network's attack surface and lowers the risk of a data breach. Here are some tips when implementing such an architecture.

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Worth Exploring: BGP from Theory to Practice

My good friend Tiziano Tofoni finally created an English version of his evergreen classic BGP from theory to practice with co-authors Antonio Prado and Flavio Luciani.

I had the Italian version of the book since the days I was running SDN workshops with Tiziano in Rome, and it’s really nice to see they finally decided to address a wider market.

Also, you know what would go well with that book? Free open-source BGP configuration labs of course 😉

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Worth Exploring: BGP from Theory to Practice

My good friend Tiziano Tofoni finally created an English version of his evergreen classic BGP from theory to practice with co-authors Antonio Prado and Flavio Luciani.

I had the Italian version of the book since the days I was running SDN workshops with Tiziano in Rome, and it’s really nice to see they finally decided to address a wider market.

Also, you know what would go well with that book? Free open-source BGP configuration labs of course 😉

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Forwarding BUM Frames in VXLAN Network With Multicast in Underlay

There are two main methods that can be used to forward broadcast, unknown unicast, and multicast (BUM) frames in a VXLAN network:

• Ingress replication.
• Multicast in underlay.

In this post, we take a detailed look at how multicast can be used to forward BUM frames by running multicast in the underlay. We are using the topology from my Building a VXLAN Lab Using Nexus9000v post. The Spine switches are configured using the Nexus feature Anycast RP. That is, no MSDP is used between the RPs. To be able to forward broadcast frames such as ARP in our topology, the following is required:

• The VTEPs must signal that they want to join the shared tree for 239.0.0.1 (to receive multicast) using a PIM Join.
• The VTEPs must signal that they intend to send multicast for 239.0.0.1 on the source tree using a PIM Register.
• The RPs must share information about the sources that they know of by forwarding PIM Register messages.
• The VTEP must encapsulate ARP packets in VXLAN and forward in the underlay using multicast.

The Leaf switches have the following configuration to enable multicast:

ip pim rp-address 192.0.2.255 group-list 224. Continue reading

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Weekend Reads 102723

Passkeys are appearing more and more in tech news, with support for them increasing. Since many administrators test out new technologies themselves first, we at CIS embarked on a short project to see what happened when an intern with our CTO team had the opportunity to implement passkeys.

Draft proposals setting a “remuneration obligation” for digital platforms started to pop up in the Brazilian congress after Australia adopted its own News Media Bargaining Code.

And can companies finally trust their data to cloud providers and actually trust that CC removes the need to worry about the cloud provider as a sub-processor with access to the data?

Google says it plans to prototype a technique to mask IP addresses via network proxies in future versions of its Chrome browser, a privacy protection similar to Apple’s iCloud Private Relay service for its Safari browser.

The cryptanalytic threat of quantum computing, particularly the “store data; decrypt later” approach, is drawing ever nearer. Unsurprisingly, the U.S. government is among those most alert to the danger.

A common critique of HTTP/3 and QUIC is that they primarily benefit the big players and companies (for example, Google and Meta), who often control one or even Continue reading

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Hedge 200: Automation with Ethan Banks

We’ve been on a long streak of discussions about automation, why it works, why it isn’t working, and what the networking industry can do about it. For this episode, we’re joined by the indubitable Ethan Banks. If you don’t think there’s anything left to say, you’ve not yet listened to Ethan!

download

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Intel shows recovery in PCs but faces competition in AI, data centers

Intel’s traditional PC dominance looked to be approaching its former rude health, but that good news in its earnings report was offset by ongoing weakness in servers.