Packet Size, It Matters
As I mentioned in a previous post, I have been studying the materials for the Cisco CCDE. One thing that has come up only a time or two is that of MTU. MTU, or maximum transmission unit, is the maximum size a chunk of data can be for a given interface. In this article, we are speaking specifically of IP MTU and this is an important distinction that I will clarify later. Network design should incorporate a clear understanding of MTU challenges and operators need to understand what to look for when it is not properly built and configured.
A simplistic example of a problematic design is when there is a link with a smaller MTU somewhere between two endpoints capable of creating larger packets (see the image below). While this environment may work fine, understanding the interaction required between the hosts and the network devices is very important to network design.
A few years ago I wrote an article that outlined some of the behavior that can be witnessed when there are MTU discovery issues. Let’s quickly recount what path MTU discovery (PMTU-D) is, how it works, how it fails and some logic around appropriate design.
General Facts Around Continue reading
Pain in the XaaS: Rise of FaaS, CaaS Adds to Cloud Orchestration Woes
The latest cloud orchestration report indicates that CIOs, cloud architects, and other IT infrastructure managers need to educate themselves on an increasingly wide variety of options.
Deutsche Telekom Demonstrates 5G Network Architecture With Third-Party VNFs
DT deployed a network data layer using HPE’s shared data environment. The shared layering helps the network handle a large variety of workloads while maintaining agility.
GitLab Ditches Microsoft Azure for Google Cloud, Kubernetes
The move is tied to the company’s desire to further exploit Google's Kubernetes support. Although the timing is interesting given Microsoft's recent announcement that it is purchasing GitHub.
Google Becomes Platinum Member of The Linux Foundation
Sarah Novotny, the head of open source strategy for Google Cloud Platform, will join The Linux Foundation board of directors.
Dell, VMware Still Dominate HCI Charts, Says IDC
For the second quarter in a row Dell Technologies’ brands ranked No. 1 in hyperconverged hardware and software sales.
FOX Networks Trials Barefoot Networks’ Tofino Programmable Chip
Broadcast networks are increasingly moving to IP, and this gives them the opportunity to take advantage of a programmable forwarding plane.
DevOps Players CloudBees, Puppet Score $100M in Funds
The DevOps market was worth nearly $2.8 billion in 2016, and is predicted to grow at an 18.6 percent CAGR through 2025, according to a Grand View Research report.
Comcast machineQ Brings IoT to Golf Courses, Mines, and Wines
The IoT business unit of Comcast, machineQ, named new customers that represent new industries and use cases for its low-power wide area network.
I Didn’t Even Know I Was Sick
This piece was originally published in the Packet Pushers’ Human Infrastructure Magazine, a publication about the human side of working in technology. HIM is sent every other week or so to Packet Pushers Ignition members. Sign up for free.
I recently tweeted…
I’ve become okay with only having so much time in my schedule. Would adding this { new | random | unexpected } thing to the mix stress me out? Yes? Then I can’t do it. Have to leave some space. Have to execute well on the things already on the list.
I grabbed a couple of replies that especially impacted me.
Cutting Things Loose Has A Cost
The hard part for me is deciding when to cut things loose in order to make room for new things that are more valuable. Sometimes it’s natural, like a job transition, but most of the time it’s not. I’d rather make intentional choices, not wait until I’m burned out. Of course, often the major problem with intentionally stopping a project is the social cost. Disappointing people is expensive for multiple reasons. And it’s very difficult to weigh that against the benefit of doing something new.
Benson crammed a whole lot Continue reading
I Didn’t Even Know I Was Sick
This piece was originally published in the Packet Pushers’ Human Infrastructure Magazine, a publication about the human side of working in technology. HIM is sent every other week or so to Packet Pushers Ignition members. Sign up for free.
I recently tweeted…
I’ve become okay with only having so much time in my schedule. Would adding this { new | random | unexpected } thing to the mix stress me out? Yes? Then I can’t do it. Have to leave some space. Have to execute well on the things already on the list.
I grabbed a couple of replies that especially impacted me.
Cutting Things Loose Has A Cost
The hard part for me is deciding when to cut things loose in order to make room for new things that are more valuable. Sometimes it’s natural, like a job transition, but most of the time it’s not. I’d rather make intentional choices, not wait until I’m burned out. Of course, often the major problem with intentionally stopping a project is the social cost. Disappointing people is expensive for multiple reasons. And it’s very difficult to weigh that against the benefit of doing something new.
Benson crammed a whole lot Continue reading
Episode 29 – MPLS Part 2 – VPNs
In a continuation of our MPLS deep-dive series, Nick Russo, Russ White, Jordan Martin, and Eyvonne Sharp return to discuss some of the operational considerations when using MPLS VPNs.
We would like to thank Core BTS for sponsoring this episode of Network Collective. Core BTS focuses on partnering with your company to deliver technical solutions that enhance and drive your business. If you’re looking for a partner to help your technology teams take the next step, you can reach out to Core BTS by emailing them here.
We also would also like to thank Cumulus Networks for sponsoring this episode of Network Collective. Cumulus is bringing S.O.U.L. back to the network. Simple. Open. Untethered. Linux. For more information about how you can bring S.O.U.L. to your network, head on over to https://cumulusnetworks.com/networkcollectivehassoul. There you can find out how Cumulus Networks can help you build a datacenter as efficient and as flexible as the worlds largest data centers and try Cumulus technology absolutely free.
Show Notes:
- When enterprise use the term “MPLS”, SP provided VPNS is often what they mean
- Generally means a private WAN service, L2 or L3VPN
- Quick packet Continue reading
Datanauts 140: Exploring End User Compute
There s a lot to be said about consuming technology remotely. Heck, the cloud is just that – someone else stands up infrastructure and services, and you consume them.
But what about for the desktop environment, which for many is their main working environment and something of a tug-of-war when it comes to ownership, management, and administration?
In today s episode of the Datanauts, join us as we de-mystify the exotic world of End User Compute, or EUC.
Our guest is Sean Massey, Senior Technical Architect at AHEAD. You can follow him on Twitter at seanpmassey and check out his blog at TheVirtualHorizon.com.
We discuss what EUC encompasses, including technologies such as VDI as well as mobile devices, laptops, and desktops. We also look at how SaaS and cloud apps affect end users and application delivery, and explore the impact of EUC/VDI on the data center.
Show Links:
Carl Stalhood – Filling gaps in EUC vendor documentation
The Virtual Horizon – Sean Massey’s blog
The post Datanauts 140: Exploring End User Compute appeared first on Packet Pushers.
