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What Layer is MPLS?

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Worth Reading: End-to-end Congestion Control Cannot Avoid Latency Spikes

Found a pointer to another you cannot beat the laws of physics or networking result: you cannot avoid latency spikes with end-to-end congestion control regardless of the amount of unicorn dust or hype you’re throwing at the problem (original paper).

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Worth Reading: End-to-end Congestion Control Cannot Avoid Latency Spikes

Found a pointer to another you cannot beat the laws of physics or networking result: you cannot avoid latency spikes with end-to-end congestion control regardless of the amount of unicorn dust or hype you’re throwing at the problem (original paper).

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Rust Notes: If Conditionals

The if conditional block in Rust behaves similarly to other languages. In Rust, if blocks act as an expression and the resulting branch can be assigned to a variable. The resulting expression of an if branch can be assigned to a variable with the let keyword. If...continue reading

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Rust Notes: Chars

A char in Rust represents a single unicode scalar value. A char is defined as a single character within single quotes eg: ('a'). Char Considerations A char is not the same as a single str character. Strings DO NOT use chars internally. A char is always 4-bytes in length. continue reading

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Rust Notes: Tuples

A tuple is a sequence of values, which can be of different types. A tuple is defined with circle brackets (). Tuple Considerations The number of elements in a tuple is known as its arity. Traits are only implemented on a tuple with an arity of 12 or less. Tuples with an arity...continue reading

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Rust Notes: Arrays

An array is a sequence of values, of the same type. A tuple is defined with square brackets []. Array Considerations Arrays live on the stack by default and have a fixed size. Traits are only implemented on an array with a size of 32 or less. Arrays with a size greater than 32 lose...continue reading

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All is fair in and #NANOG Hackathons — refurbishing NAPALM drivers to build a multi-vendor…

All is fair in 💔 and #NANOG Hackathons — refurbishing NAPALM 🔥 drivers to build a multi-vendor #gNMI plug-in 🔌

We’re in Austin, Texas this week where the 84th North American Network Operators Group (NANOG) convention is taking place. Preceding that, during the Super Bowl ⅬⅤⅠ weekend (in which another blue team is about to win big), there is a Hackathon in which the teams are challenged to prepare for the networking equivalent of an epic halftime show.

Yours truly figures it would be a good idea to use this opportunity to kick-off the creation of a multi-vendor NAPALM driver. Most (if not all) NAPALM drivers to date are single vendor, see for example the Nokia SR OS NAPALM driver and the SR Linux variant. However, there is significant overlap in functionality and logic, and so I’d like to see if there is a possibility to “share the burden” by collaborating on some of the more basic (and — quite frankly — boring) parts of the drivers.

My (rough) plan is to clone the best current NAPALM driver code base — eos has been suggested — remove whatever logic it uses to talk to its vendor specific device APIs, and replace that with pyGNMI. To demonstrate this Continue reading

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Worth Reading: Crazy about VMware SD-WAN

Have to work with VMware SD-WAN (the entity formerly known as VeloCloud)? You might find interesting tidbits in Crazy about VMware SD-WAN by Alexander Marhold.

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Worth Reading: Crazy about VMware SD-WAN

Have to work with VMware SD-WAN (the entity formerly known as VeloCloud)? You might find interesting tidbits in Crazy about VMware SD-WAN by Alexander Marhold.

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Data center capex on the rise despite cloud momentum

Global capital expenditure on data center infrastructure is set to grow by 10% over the next five years, to a total of $350 billion by 2026, in spite of the general move toward cloud in the enterprise, according to a report released earlier this month by Dell’Oro Group.Part of that spending growth will be driven by hyperscalers like Google, Amazon and Microsoft buying up data center equipment for their own public clouds, but an underrecognized trend is that the cloud isn’t for every organization, according to the report’s author, research director Baron Fung.To read this article in full, please click here

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Data center capex on the rise despite cloud momentum

Global capital expenditure on data center infrastructure is set to grow by 10% over the next five years, to a total of $350 billion by 2026, in spite of the general move toward cloud in the enterprise, according to a report released earlier this month by Dell’Oro Group.Part of that spending growth will be driven by hyperscalers like Google, Amazon and Microsoft buying up data center equipment for their own public clouds, but an underrecognized trend is that the cloud isn’t for every organization, according to the report’s author, research director Baron Fung.To read this article in full, please click here

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Who Wants to Be Supported Forever?

I saw an interesting thread today on Reddit talking about using networking equipment past the End of Life. It’s a fun read that talks about why someone would want to do something like this and how you might find yourself in some trouble depending on your company policies and such. But I wanted to touch on something that I think we skip over when we get here. What does the life of the equipment really mean?

It’s a Kind of Magic

As someone that uses equipment of all kinds, the lifetime of that equipment means something different for me than it does for vendors. When I think of how long something lasts I think of it in terms of how long I can use it until it is unable to be repaired any further. A great example of this is a car. All of my life I have driven older used cars that I continue to fix over and over until they have a very high mileage or my needs change and I must buy something different.

My vehicles don’t have a warranty or any kind of support, necessarily. If I need something fixed I either fix it myself or Continue reading

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The Next – And More Profitable – 10 Percent Of Server Share For AMD

When this is all said and done, Intel will deserve some kind of award for keeping its 14 nanometer processes moving along enough as it gets its 10 nanometer and 7 nanometer processes knocked together to still, somehow, manage to retain dominant market share in the server space. …

The Next – And More Profitable – 10 Percent Of Server Share For AMD was written by Timothy Prickett Morgan at The Next Platform.

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Heavy Networking 617: Go Vs. Python For Network Engineers

Today's Heavy Networking makes the case for why network engineers should consider using the Go language instead for their automation needs. Guest Darren Parkinson makes a strong argument for adding Go to your tool kit.

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Heavy Networking 617: Go Vs. Python For Network Engineers

Today's Heavy Networking makes the case for why network engineers should consider using the Go language instead for their automation needs. Guest Darren Parkinson makes a strong argument for adding Go to your tool kit.

The post Heavy Networking 617: Go Vs. Python For Network Engineers appeared first on Packet Pushers.

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Win the Data Center Race with On-Premises Cloud

Embracing the cloud data center model for on-premises operations eliminates the need for compromise and provides the flexibility to scale as business requirements change.

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How to use the sequence command: 2-Minute Linux Tips

In this Linux tip, we’re going to look at the seq (sequence) command. It provides a very easy way to generate a sequence of numbers and gives you a lot of control.

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Video: Network Layer Addressing

After a brief excursion into the ancient data link layer addressing ideas (that you can still find in numerous systems today) and LAN addressing it’s time to focus on network-layer addressing, starting with “can we design protocols without network-layer addresses” (unfortunately, YES) and “should a network-layer address be tied to a node or to an interface” (as always, it depends).

For more details, watch the Network Layer Addressing video (part of How Networks Really Work webinar).

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Video: Network Layer Addressing

After a brief excursion into the ancient data link layer addressing ideas (that you can still find in numerous systems today) and LAN addressing it’s time to focus on network-layer addressing, starting with “can we design protocols without network-layer addresses” (unfortunately, YES) and “should a network-layer address be tied to a node or to an interface” (as always, it depends).

For more details, watch the Network Layer Addressing video (part of How Networks Really Work webinar).