How to simulate a host in a real network?

How to simulate a host

Like some other posts, I didn’t think I would write this one because it seemed obvious. But, after talking to a lot of engineers and customers, I realized that not everyone knows this trick. So here it is. The question is this: how to simulate a real host in a physical network environment when you don’t have computer at your disposal? Well, let’s take an example.

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Automate file uploads to your Cisco Nexus switches

If you have more than three Cisco Nexus switches in nx-os mode, and you are not using Cisco DCNM or any other similar tool, you probably already have encountered this question: How to automate file uploads to your Cisco Nexus switches? Here is a turnkey Python script using Netmiko’s SCP function to do this.

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Cisco NX-OS Graceful Insertion and Removal (GIR)

Cisco GIR

If you operate a data-center network with Cisco Nexus, you’ve probably already faced the problem of how to perform a maintenance on one of the two switches of a vPC pair, with minimum impact and risks for the production network. Cisco NX-OS contains a feature called “Graceful Insertion and Removal” or GIR to help you for that. Here is how it works.

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100Gb Ethernet transceivers, modules and form factors on Cisco products

100Gb-Ethernet

At the time of the 400Gb Ethernet interfaces introduction, here is a summary of the different form-factors, transceivers and modules available for 100Gb Ethernet on Cisco devices. As you will see below, there are many different types of 100Gb Ethernet transceivers. And each type have its own functional mode. In a next article, I will try to explain the differences between them and will give more details about the most common: the QSFP-28.

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