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...
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...
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...
Invalid Message-Authenticator is a common error in AAA authentication. The most likely cause is that the shared secret configured on the server and client do not match. If you are sure that there is...
Notepad++ is often used in my work, mainly for analyzing logs. If I can mark some important content in advance, it will greatly improve my work efficiency. So I started the ax-udl project, which...
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,...
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...
There are two common methods to recover password for Cisco lightweight access points. Reset LAP through with Controller CLI This method is limited to the case where the AP has joined the WLC. config...
Updated on May 21, 2020: If you are looking for C9800 wireless controller automation, please refer to my following article, I hope this helps you.Monitoring IOS-XE device with Netconf API + Grafana + InfluxDB...
For wireless environments, there’s competition everywhere. If an AP serves many clients, there must be delays and packet loss. Aggressive Load Balancing was created to solve this problem, the number of clients connected to...
If you are using Wave2 AP and WPA2 TKIP is enabled, it may cause client connection problems. This is because the Wave2 AP does not support WPA2 TKIP. In versions 8.4 and above, the...
If your WLC failed to load image, you may need to recovery the WLC using RTOS image. We need to contact TAC to get the RTOS image. The following are the upgrade steps. Type...
Cause Analysis Mobility Express environment allows redundancy, If the Master AP fails, another AP(MOBILITY EXPRESS CAPABLE image installed) will become the Master AP. VRRP plays an important role in the Failover process of ME,...
Configuring LAG(link aggregation) allows the AP to provide 2 Gbps uplink. Configuring WLC Use the command “config ap lag-mode support enable” to enable global LAG support. This will cause the DTLS connection to be...
We know that the asterisk in the Catalyst means <Time is not authoritative>. *—Time is not authoritative.(blank)—Time is authoritative..—Time is authoritative, but NTP is not synchronized. https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750e_3560e/software/release/12-2_55_se/configuration/guide/3750escg/swadmin.html Does AP mean the same thing? The...
Both reset system and restart can reload the WLC. But what is the difference? Why are there two commands? There are two explanations for the commands in the CLI. We can see that the...
For the 1800/2800/3800 series, there are two models, one is K9 and the other is K9C. C in K9C means Configurabule. Usually, the K9C image at the factory is Mobility Express controller software, and...
Recent Comments