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vlog. Episode 5. NetLdn: Networking for Networkers

Hello my friends,

It is always cool to talk about various network technologies with the engineers from industry, and to meet some awesome chaps. I had a pleasure to attend such an event in London in the last months. Learn my findings on that.

In this episode, together with James Bensley and Richard Patterson from Sky we discuss the the NetLdn event series. The event, where you can discuss network technoligies with the peers and, perhaps, make some friends.

Don’t forget to subscribe for the channel, put likes and repost the video if you like that!

Support us

P.S.

If you have further questions or you need help with your networks, I’m happy to assist you, just send me message. Also don’t forget to share the article on your social media, if you like it.

BR,
Anton Karneliuk

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2-Minute Linux Tip: The env command

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Two AMD Epyc processors crush four Intel Xeons in tests

Tests by the evaluation and testing site ServeTheHome found a server with two AMD Epyc processors can outperform a four-socket Intel system that costs considerably more.If you don’t read ServeTheHome, you should. It’s cut from the same cloth as Tom’s Hardware Guide and AnandTech but with a focus on server hardware, mostly the low end but they throw in some enterprise stuff, as well.ServeTheHome ran tests comparing the AMD Epyc 7742, which has 64 cores and 128 threads, and the Intel Xeon Platinum 8180M with its 28 cores and 56 threads. The dollars, though, show a real difference. Each Epyc 7742 costs $6,950, while each Xeon Platinum 8180M goes for $13,011. So, two Epyc 7742 processors cost you $13,900, and four Xeon Platinum 8180M processors cost $52,044, four times as much as the AMD chips.To read this article in full, please click here

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Two AMD Epyc processors crush four Intel Xeons in tests

Tests by the evaluation and testing site ServeTheHome found a server with two AMD Epyc processors can outperform a four-socket Intel system that costs considerably more.If you don’t read ServeTheHome, you should. It’s cut from the same cloth as Tom’s Hardware Guide and AnandTech but with a focus on server hardware, mostly the low end but they throw in some enterprise stuff, as well.ServeTheHome ran tests comparing the AMD Epyc 7742, which has 64 cores and 128 threads, and the Intel Xeon Platinum 8180M with its 28 cores and 56 threads. The dollars, though, show a real difference. Each Epyc 7742 costs $6,950, while each Xeon Platinum 8180M goes for $13,011. So, two Epyc 7742 processors cost you $13,900, and four Xeon Platinum 8180M processors cost $52,044, four times as much as the AMD chips.To read this article in full, please click here

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Running sflowtool using Docker

The sflowtool command line utility is used to convert standard sFlow records into a variety of different formats. While there are a large number of native sFlow analysis applications, familiarity with sflowtool is worthwhile since it provides a simple way to verify receipt of sFlow, understand the contents of the sFlow telemetry stream, and build simple applications through custom scripting.

The sflow/sflowtool Docker image provides a simple way to run sflowtool. Run the following command to print the contents of sFlow packets:

$ docker run -p 6343:6343/udp sflow/sflowtool
startDatagram =================================
datagramSourceIP 10.0.0.111
datagramSize 144
unixSecondsUTC 1321922602
datagramVersion 5
agentSubId 0
agent 10.0.0.20
packetSequenceNo 3535127
sysUpTime 270660704
samplesInPacket 1
startSample ----------------------
sampleType_tag 0:2
sampleType COUNTERSSAMPLE
sampleSequenceNo 228282
sourceId 0:14
counterBlock_tag 0:1
ifIndex 14
networkType 6
ifSpeed 100000000
ifDirection 0
ifStatus 3
ifInOctets 4839078
ifInUcastPkts 15205
ifInMulticastPkts 0
ifInBroadcastPkts 4294967295
ifInDiscards 0
ifInErrors 0
ifInUnknownProtos 4294967295
ifOutOctets 149581962744
ifOutUcastPkts 158884229
ifOutMulticastPkts 4294967295
ifOutBroadcastPkts 4294967295
ifOutDiscards 101
ifOutErrors 0
ifPromiscuousMode 0
endSample   ----------------------
endDatagram   =================================

The -g option flattens the output so that it is more easily filtered using grep:

$ docker run -p 6343:6343/udp sflow/sflowtool -g | grep ifInOctets
2019-09-03T22:37:21+0000 10.0.0.231  Continue reading

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IT Hero Culture

I’ve written before about rock stars and IT super heroes. We all know or have worked with someone like this in the past. Perhaps we still do have someone in the organization that fits the description. But have you ever stopped to consider how it could be our culture that breeds the very people we don’t want around?

Keeping The Lights On

When’s the last time you got recognition for the network operating smoothly? Unless it was in response to a huge traffic spike or an attack that tried to knock you offline, the answer is probably never or rarely. Despite the fact that networks are hard to build and even harder to operate, we rarely get recognized for keeping the lights on day after day.

It’s not all that uncommon. The accounting department doesn’t get recognized when the books are balanced. The janitorial staff doesn’t get an exceptional call out when the floors are mopped. And the electric company doesn’t get a gold star because they really did keep the lights on. All of these things are examples of expected operation. When we plug something into a power socket, we expect it to work. When we plug a router Continue reading

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Hurricane Dorian: We Are Not Dormant

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The Caribbean remains vulnerable to natural disasters and this has a huge impact on the social and economic development of the region. According to Professor Jamal Saghir, former World Bank executive, and other experts, 20 percent of the Caribbean GDP is spent on natural disaster recovery.  You must realize that we are talking about Small Islands Developing States (SIDS) that are already prone to all kinds of challenges due to their small economies.

Natural disasters are not going away and we can even expect them to have greater destructive power in the future. Although we cannot fight against nature, doing nothing is not an option.

At the Internet Society we work for an Continue reading

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Intent-Based Networking with Batfish on Software Gone Wild

Imagine you would have a system that would read network device configurations, figure out how those devices might be connected, reverse-engineer the network topology, and be able to answer questions like “what would happen if this link fails” or “do I have fully-redundant network” or even “how will this configuration change impact my network”. Welcome to Batfish.

Interested? You’ll find more in Episode 104 of Software Gone Wild.

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HPE’s vision for the intelligent edge

It’s not just speeds and feeds anymore, it's intelligent software, integrated security and automation that will drive the networks of the future.That about sums up the networking areas that Keerti Melkote, HPE's President, Intelligent Edge, thinks are ripe for innovation in the next few years.He has a broad perspective because his role puts him in charge of the company's networking products, both wired and wireless.Now see how AI can boost data-center availability and efficiency “On the wired side, we are seeing an evolution in terms of manageability," said Melkote, who founded Aruba, now part of HPE. "I think the last couple of decades of wired networking have been about faster connectivity. How do you go from a 10G to 100G Ethernet inside data centers? That will continue, but the bigger picture that we’re beginning to see is really around automation.” To read this article in full, please click here

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HPE’s vision for the intelligent edge

It’s not just speeds and feeds anymore, it's intelligent software, integrated security and automation that will drive the networks of the future.That about sums up the networking areas that Keerti Melkote, HPE's President, Intelligent Edge, thinks are ripe for innovation in the next few years.He has a broad perspective because his role puts him in charge of the company's networking products, both wired and wireless.Now see how AI can boost data-center availability and efficiency “On the wired side, we are seeing an evolution in terms of manageability," said Melkote, who founded Aruba, now part of HPE. "I think the last couple of decades of wired networking have been about faster connectivity. How do you go from a 10G to 100G Ethernet inside data centers? That will continue, but the bigger picture that we’re beginning to see is really around automation.” To read this article in full, please click here

0

HPE’s vision for the intelligent edge

It’s not just speeds and feeds anymore, it's intelligent software, integrated security and automation that will drive the networks of the future.That about sums up the networking areas that Keerti Melkote, HPE's President, Intelligent Edge, thinks are ripe for innovation in the next few years.He has a broad perspective because his role puts him in charge of the company's networking products, both wired and wireless.Now see how AI can boost data-center availability and efficiency “On the wired side, we are seeing an evolution in terms of manageability," said Melkote, who founded Aruba, now part of HPE. "I think the last couple of decades of wired networking have been about faster connectivity. How do you go from a 10G to 100G Ethernet inside data centers? That will continue, but the bigger picture that we’re beginning to see is really around automation.” To read this article in full, please click here

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Weak Chinese Switch Market Quashes Global Growth, Says Dell’Oro

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