Someone asked me an interesting question, whether lightweight APs can join a Catalyst 9800 Wireless LAN Controller over a mesh network. My first thought was to implement it with Ethernet Bridging, and after testing...
I recently installed Splunk 8.2.4 because older version of Splunk was affected by the Log4j vulnerability, the following is the installation process. Installation Download and install the dpkg package. Initial configuration Entering the following...
The vulnerability of the Apache Log4j Library affects a very wide range, and the Cisco Identity Services Engine also affected. In this article I will discuss how to install Log4j patch to ISE. I...
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....
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...
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...
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...
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...
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...
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.
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...
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...
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...
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...
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...
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...
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...
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...
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