Tag Archives: simulation

27 May

How to change the SSL certificate in CML 2.0

How to change the SSL certificate in CML 2.0

In the previous article I described my first impressions after launching the successor to Cisco VIRL, the Cisco Modeling Labs 2.0. I pointed out that one of the potentially strong points of CML 2.0 will be its API. However, for the proper functioning of the API, it would be appropriate to change the default SSL certificate. I have prepared an instructions on how to do it – this is unfortunately not an easy task, but anyone can install their own SSL certificate in CML 2.0

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15 May

Why CML 2.0 is quite a disappointment

Why CML 2.0 is quite a disappointment

Finally, after weeks of waiting, I could test the successor of the famous VIRL – the Cisco Modeling Labs 2.0. Earlier, the product was known under the working name VIRL2, but it was finally renamed as CML 2.0. Yes, I know. There are already a lot of reviews on the web, both written or in the form of video. Unfortunately, I am not a Cisco employee to have access to internal versions for a long time, or user of the Enterprise version that was released a month earlier and due to the price probably not available for many companies. Fortunately, CML 2.0 Personal is out, and I had the opportunity to take a look at it. This is my first impression. There are a few things that I think deserve attention (this is not a complete list for sure).

This article has been originally posted on my polish blog Szkoła DevNet (DevNet School)

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18 Aug

Generate multicast​ traffic in VIRL using Ostinato

Cisco and VIRL logos

Ostinato is a traffic generator. You can use it to craft packets and send flow into your network. You can even send multiple streams if required. It is a tool that network admins and developers should use for testing the system or application against various scenarios. Ostinato is by default available on Cisco VIRL so we can use it as a packet generator in our simulations.

Ostinato consists of two components – the LXC image run in a simulation that generates the traffic and GUI frontend. In this article, I will show you how to use it to generate a multicast stream in VIRL simulation.

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01 Jun

How to manage simulation in VIRL from local network

Cisco and VIRL logos

I’ve been using Cisco VIRL for over two years for both learning technologies and testing new solutions as PoC. Accessing devices in simulation via embedded console link is easy but not efficient. I always wanted to manage simulation in VIRL from my laptop not desktop PC. Also in many scenarios you  may want to connect external servers like netflow collector or IPAM software you wanna test. Also it’s quite handy to have access to running simulation form Internet, isn’t it?

Let me show you how I connect Cisco VIRL running simulation to other devices in my network and to Internet. In this tutorial I assume that you didn’t change default VIRL networking configuration.

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