Ansible Ansible - Making Variables Optional By default, Ansible requires values for all variables in a templated expression. If a variable is not defined, it throws Suresh Vina Oct 26, 2022 1 min read
Cisco Cisco ASA Active/Passive Failover Configuration Example Overview High Availability is one of the most crucial requirements for a smooth network operation. In terms of routers or Suresh Vina Oct 24, 2022 10 min read
Python Network Device Templating using Jinja and Python Recently, I came across a task of generating configurations for a handful of Cisco switches. The most important thing of Suresh Vina Oct 15, 2022 7 min read
Palo Alto Panorama Device Groups and Templates (with examples) Overview People who follow my blog may probably know that I'm a big fan of Cisco ASA firewalls Suresh Vina Sep 20, 2022 8 min read
Cisco Cisco 3850 Switch Stack Upgrade In this blog post we will look at how to upgrade Cisco Catalyst 3850 Series Stack Switches using Install mode. Suresh Vina Sep 14, 2022 3 min read
Python Python - Read and Write CSV Files (with examples) Once you start working with Python, sooner or later you will come across having to work with CSV files. In Suresh Vina Sep 7, 2022 5 min read
ISE Everything you need to know about NAC, 802.1X and MAB In a simpler form, Network Access Control ensures that only users and devices that are authenticated and authorized can enter Suresh Vina Aug 29, 2022 7 min read
Palo Alto Palo Alto DNS Proxy (with Examples) Overview You can configure the Palo Alto Firewall to act as a DNS server. All the clients' DNS will Suresh Vina Aug 23, 2022 4 min read
PALO-REST-API Palo Alto REST API with Python In the previous post, we covered PanOS REST API fundamentals. In this post, we will go through the example and Suresh Vina Aug 18, 2022 5 min read
PALO-REST-API Getting started with Palo Alto REST API PanOS REST API is an incredibly powerful tool to manage both Palo Alto Firewalls and Panorama through various API platforms Suresh Vina Aug 15, 2022 6 min read
Cisco Cisco IOS-XE RSPAN Configuration Example RSPAN copies all the traffic that comes in and out of source ports or source VLANs to a destination port Suresh Vina Jun 23, 2022 2 min read
Python Python to find Switch & Port using Mac Address Recently, I came across a task where I had to track down the switch ports the devices are connected to Suresh Vina May 20, 2022 6 min read
Cisco Cisco 9300 IOS upgrade and Smart Licensing Introduction This blog post describes how to upgrade Cisco Catalyst C9300 Series Switch using Install mode. The example shows the Suresh Vina May 19, 2022 6 min read
Cisco Cisco ASA Syslog with Splunk In this blog post, I will show you how to send and visualize Cisco ASA syslog in Splunk. Splunk is Suresh Vina May 10, 2022 6 min read
Netmiko Python Network Automation with Netmiko - Part 2 In the previous post, we have seen how to get started with Netmiko and send a single command to a Suresh Vina May 7, 2022 5 min read
Netmiko Python Network Automation with Netmiko - Part 1 Netmiko a popular Python library used in Network Automation, providing a simple and easy-to-use interface for interacting with Networking Devices. Suresh Vina May 6, 2022 10 min read
Palo Alto A simple guide to Palo Alto Active/Passive Failover High Availability is one of the most crucial parts of network operation. In terms of routers and switches, we have Suresh Vina Apr 26, 2022 7 min read
AWS AWS NAT Gateway High Availability NAT Gateway enables instances in a private subnet to connect to the Internet but external services cannot initiate a connection Suresh Vina Apr 7, 2022 3 min read