Skip to content
garzum.net

garzum.net

Computer networks, network automation and SDN articles

  • Home
  • Cisco DevNet
  • Tools
  • GitLab
  • About
You are Here
  • Home
  • Operating system

Category: Operating system

Cisco, iOS, Pexpect, Python

Flow control with pexpect

13/03/2023 Radosław Kochman

Using pexpect is pretty straightforward, but what about the situations, when we don’t know in what state the device, that we’re interacting with is? In such a scenario, we have to implement logic in our script that could handle different

Read More

Leave a Comment on Flow control with pexpect
Share
Cisco, iOS, Pexpect, Python

Basic Cisco router automation workflow with pexpect

10/03/202310/03/2023 Radosław Kochman

Network automation can take many forms depending on the technologies and environments. Sometimes though, we have to dive deep into low-level automation, where we can’t use REST API or other more-convenient technologies. In this article, we will take a brief

Read More

Leave a Comment on Basic Cisco router automation workflow with pexpect
Share
Cisco, GNS3, iOS, NetStudy

TCN impact on the MST topology

28/04/202228/04/2022 Radosław Kochman

Topology changes in a spanning-tree domain are inevitable. But what actually happens, and what impact does it have on the environment? We will find it out in this article! Topology We will examine today’s scenarios on the 3-tier topology. We’ve

Read More

Leave a Comment on TCN impact on the MST topology
Share
Cisco, GNS3, iOS, NetStudy

PVST and MST (in)compatibility

27/04/202227/04/2022 Radosław Kochman

Spanning-tree protocol configurations can cause headaches among network engineers. Especially if we have mixed topology, with more than one STP implementation. In this article, we will look closer at the interoperability between the Cisco PVST and MST. Based on two

Read More

Leave a Comment on PVST and MST (in)compatibility
Share
GNS3, Nokia/Alcatel, TiMOS/SR-OS

How to add and configure Nokia VSR VM in the GNS3

13/11/202113/11/2021 Radosław Kochman

GNS3 is a powerful tool to simulate computer networks. Many images are ready to use right after the basic setup. However, sometimes we have to put in some more work to make everything work as expected. In this article, we

Read More

Leave a Comment on How to add and configure Nokia VSR VM in the GNS3
Share
Cisco, GNS3, iOS, NetStudy

OSPF with BFD case study

18/10/202118/10/2021 Radosław Kochman

While administrating the network, it’s important to think about high availability. If one network element goes down, the network can still operate properly after it’s converged. But how about the convergence time? It differs from one protocol to another, and

Read More

Leave a Comment on OSPF with BFD case study
Share
Cisco, GNS3, iOS, NetStudy

IPv6 tunneling over IPv4 GRE

17/07/202116/07/2021 Radosław Kochman

As network engineers, sometimes we have to deal with unusual problems. One of them is when we have two isolated IPv6 network parts, but we want them to be able to communicate with each other. In this article, we’re gonna

Read More

Leave a Comment on IPv6 tunneling over IPv4 GRE
Share
Cisco, GNS3, iOS, NetStudy

Layer 3 MTU case study

07/06/202103/06/2021 Radosław Kochman

In the previous article, I’ve touched the layer 2 MTU topic. This time, we will see how’s the behaviour of layer 3 MTU in 3 different scenarios. Packet structure First of all, before we touch on some case scenarios, let’s

Read More

Leave a Comment on Layer 3 MTU case study
Share
Cisco, GNS3, iOS, NetStudy

Layer 2 MTU case study

03/05/202103/05/2021 Radosław Kochman

The MTU topic seems to be confusing, especially among young network engineers. I’ve decided to into two parts. This article is focused on the layer 2 MTU aspect exclusively. I’ve prepared 3 case scenarios to present how’s switch behaves with

Read More

Leave a Comment on Layer 2 MTU case study
Share
NetStudy, Nokia/Alcatel, SR-Linux

Basic layer 2 operations on Nokia SR-Linux

19/04/202103/05/2021 Radosław Kochman

In this article, we will dive into a brand-new Nokia network operating system – SR-Linux, which is available on a Nokia 7220 series. We will focus mainly on the basic L2 operations on this platform. Topology The topology for this

Read More

Leave a Comment on Basic layer 2 operations on Nokia SR-Linux
Share
1 2 Next »

Newsletter

Recent Posts

  • Flow control with pexpect
  • Basic Cisco router automation workflow with pexpect
  • Network automation – why does it matter?
  • Cisco SD-WAN REST API calls with Python’s requests library
  • Cisco SD-WAN REST API calls with Postman

Categories

  • Cisco
  • Cisco DNA Center
  • Cisco Meraki
  • Cisco SD-WAN
  • Dell
  • DEVASC 200-901
  • FTOS
  • GNS3
  • iOS
  • Linux
  • Netmiko
  • NetStudy
  • Network automation
  • News
  • Nokia/Alcatel
  • Pexpect
  • Python
  • Quanta
  • REST API
  • SDN
  • SR-Linux
  • TiMOS/SR-OS
  • Terms and Conditions
All Right Reserved 2020. Proudly powered by WordPress | Theme: Ocius by Candid Themes.