Building up a Cisco mobility express environment

First, order a new PoE+ Injector with 30 Watt output (IEEE 802.3at) -.- after some hours, not seeing the SSID, I figured out that the new 2800 and 3800 access points won’t start their radio-interfaces if the AP doesn’t get enough power. You can convert any controller-based access point to a “configurable” (formerly (autonomous) by changing … Read more

Cisco WLC HA with 2504 series

I already posted a tutorial about Cisco WLC HA with 5500er series but I want to show you how to configure an N+1 high availability system with 2504 WLC from Cisco. Our main WLC will be a Cisco 2504 AIR-CT2504-5-K9 (supports five access points) and a HA unit Cisco 2504 AIR-CT2504-HA-K9. Here is the basic-configuration … Read more

Cisco switch “inline power denied”

I had a curios problem with the new Cisco Aironet access points “AIR-AP2702I-UXK9”. This are universal (country-independent) APs. After several seconds, the access points from this series (connected directly to the PoE switches) made a power reset. Powering this APs with PoE-Injector solved the problem. The Cisco switches used in the environment are 3550 series. The installed firmware … Read more

Cisco Right to Use (RTU) Licensing

Cisco AP licensing on wireless lan controller was always a little bit “messy”. You need to add AP-adder licenses to your current license by activating a PAK (Product activation key) on with your Cisco CCO ID, downloaded the lic file and upload it to your controller AND (!) restarting the whole machine. The last days, … Read more

Multiple SSIDs with Cisco Access Points

In this example I will show you how to configure multiple SSIDs on a dual-band autonomous Cisco access point. The interface “Dot11Radio0” is for 2.4 GHz and “Dot11Radio1” for 5 GHz. We will configure three SSIDs for different VLANs. Create your VLANs for your wireless network: dot11 vlan-name Intern vlan 1 dot11 vlan-name Scanner vlan 10 … Read more

The meaning of the Cisco WLC Ports

“management” Main-Interface that is bound to the physical interfaces. For the WLC 5520, the “management” interface lies on the installed 10 Gbit Ports “Port 1” and “Port 2”. When you activate the LAG function, all physical ports (except the yellow copper ports) will be bound to one LAG. Enabling or disabling the LAG option is … Read more

Ekahau Site Survey 8.5.1 released

The software that I’m using for WiFi Site Surveys is Ekahau Site Survey. Version 8.5.1 was released yesterday. What is Ekahau? Over 12 years in the making, ESSTM maintains its reputation as the easiest to use, enterprise-grade Wi-Fi design and maintenance tool for Wi-Fi professionals. With crystal clear heat maps and easy-to-use reports, ESS makes it simple … Read more

Cisco access point rescue installation

You can freshly install a software image for the cisco access points from boot CLI (like rmon on routers). If there is no image on the flash device, the device will automatically boot to the CLI otherwise you can press Esc while booting up. First you need to configure an IP address: set IP_ADDR … Read more

Cisco WLC HA failure scenario

Some days ago I tested the HA WLC cluster at one of my customer. This is the environment: – First WLC (let’s call it “Main-WLC”) with (with shared management IP – Second WLC (let’s call it “HA-WLC”) with (with shared management IP We powered-off the Main-WLC, the access points and wireless … Read more

Cisco WLC DHCP Option 43

You can provide the Cisco Aironet Wireless Controller address to your access point via DHCP option 43, so you don’t need to configure manually every AP itself. In my case, I had a Cisco WLC 5508 HA cluster on the headquarter and Cisco 2700 access points at a remote location. Open your DHCP management console at … Read more