How to change the DSCP value in IP header
If you need to validate your QoS configuration, this article may be helpful to you. I will discuss here how to change the DSCP value in the simplest way, including Linux and Windows systems....
Author: Haifeng
Using WifiInfoView to let Windows clients connect to a specific BSSID
Recently I was troubleshooting a wireless problem. The symptom is that the client cannot connect to a certain radio interface. However, in the test, because the client often selects other radio interfaces, the symptom...
How to capture VLAN tags
We may need to capture vlan tags during troubleshooting, the configuration method is summarized as follows. Switch side configuration Cisco switches can use Switched Port Analyzer (SPAN) to capture packets, and we need to...
Cisco Option 43 Generator
Option 43 can be used to discover WLC or convert EWC/ME to CAPWAP. This is a really useful feature, and I often need to use it in my tests. But its format conversion is...
Initially configure an ISR 1100 router
Ports Connect the GigabitEthernet port to the upstream switch. Configure the wireless interface, the configuration is the same as the GigabitEthernet port. We may also need to configure the default route. After configuration, it...
Microsoft Playwright Automation Tool
Playwright is a browser automation tool released by the Microsoft team. Another popular tool similar to it is Selenium. Playwright has a significant advantage in recording and generating code. Installation Generate code We can...
Get started with Quasar
Installing Quasar with npm. Create Quasar project folder. Start the Quasar Project. We may encounter the following errors. Use the -p parameter to change to other port.
Use Visual Studio Code Remote-SSH Plugin for Remote Development
I have multiple remote Ubuntu servers for running Python scripts. Before that, I had two choices, using SSH to login remotely for development, or copying file to the remote servers after local development. But...
8 Useful Tips & Tricks for SecureCRT
SecureCRT is powerful, high-usability terminal emulator. I found some useful tips & tricks when using SecureCRT, which are summarized below. Copy & Paste When using terminal window, we often need to copy & paste...
How to use Crontab on Ubuntu server
Crontab is a command used to execute tasks regularly in Linux/Unix operating systems. It is very suitable for repetitive tasks. I am using Ubuntu 20.04 LTS, but the crontab commands in most linux distributions...
Install FTP Server vsFTPd On Ubuntu
vsFTPd is a lightweight FTP server. After installation, we can use filezilla to upload or download files. Installation Configuration We may encounter “550 permission denied” error, which impossible to upload files. Then restart vsftpd...
Initial Configuration for Embedded Wireless Controller
Product overview Official explanation The Cisco® Embedded Wireless Controller (EWC) on Catalyst® Access Points is a software-based controller integrated into Cisco Catalyst 9100 Access Points. It is a simplified, low-cost, feature-rich Wi-Fi architecture with...
Getting Started with Vuetify
Installation Install Vue.js Creat a new Vue.js project using Vue CLI Add the Vuetify package Check Vue.js and Vuetify version Edit vue.config.js, configure as relative path Start development server Build for production References Vuetify...
How to solve AireOS raw Telnet mode problem
Given that telnet sends data in clear text, we prefer to use SSH instead of telnet for security reasons. This article does not recommend using telnet to connect to AireOS WLC, but hopes that...
Understanding RESTCONF
Basic Concepts of RESTCONF Derived from Netconf Model definition in YANG The request/response data is XML or JSON Using HTTPS methods(GET / PATCH / POST / DELETE / PUT) RESTCONF URI format: /<api-entry>/<resource-type>/<yang-module:resource> Yang...
snmp-cmds and pysnmp examples
snmp-cmds example pysnmp example
Using the Cisco UI kit
Cisco UI kit is part of DevNet and can be used to develop web applications, here is the GitHub page. Installation Create a folder and clone the UI Kit source from Github. Use the...
Paramiko and Netmiko examples
Paramiko example: Netmiko example: Common error： If the Python file name is paramiko.py or netmiko.py, the following error will occur. Changing the file name can solve this problem.
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