Install Ansible on Ubuntu

The installation environment is Ubuntu 19.10. Upgrade packages Install Ansible Verification ansible.cfg: This is the ansible configuration file.hosts: The hosts file includes the device information( IP address, etc.). Documentation Installing Ansible on Ubuntu https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html#installing-ansible-on-ubuntu

Configure network with netplan on Ubuntu

I installed new Ubuntu 19.10 server and realized that I need to use netplan to configure the network. The following is my configuration. Configure the IP address and DNS Configure proxy Save configuration We...

Configure 802.1X on 9800 series WLC and ISE

1. Configure AAA Add the ISE address to the 9800 WLC. Configure Server Groups (optional, not required). Configure AAA Method (required), If not configured, authentication will fail, which will be discussed in 6. Verification....

Embedded Event Manager simple example

EEM can be used for monitoring, or triggered by specified conditions (change configuration, etc.). The following is Cisco official document. Embedded Event Manager (EEM) is a distributed and customized approach to event detection and...

Configure guestshell on Cisco CSR 1000V

1. Enable IOx 2. Confirm IOx status We can see IOx service (IOxman): Not Ready. This may take a few minutes. 3. Configure port If the port is not configured correctly, the following error...

Upgrade a Cisco Catalyst 9800 Series Wireless Controller

1. Delete old installation files install remove inactive 2. Copy files from ftp server to flash memory copy ftp://username:password@image flash: 3. Confirm copied file dir flash:*.bin 4. Install to bootflash install add file bootflash:image...

Tips for saving teraterm logs

In the previous article I shared how to save putty logs, this time I will share how to save Tera Term logs automatically. Setup – Additional settings Set directory and file name For the...

Tips for saving putty logs

Admittedly, putty is a good tool. I often need to copy the putty logs to a txt file for analysis. I would like to share here two tips for using putty. Let putty output...

Configure color theme for putty

For network engineers, you may use putty every day at work. Some people who are willing to share have made the putty color theme, and we only need to download it to easily configure...

How to configure Splash Page Redirect (WLC + ISE)

In this post I will show how to configure Splash Page Redirect. The logic of Splash Page Redirect is to use 802.1X for identity authentication. When the authenticated user tries to access the webpage,...

How to Decrypt WPA packet with Wireshark

When troubleshooting wireless issues, we often need to analyze OTA packets. The annoying thing is that most of these packets are encrypted, and we can’t see the contents inside. Fortunately, we can use Wireshark...