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For example, the WLC that uses regulatory domain -A can only be used with APs that use regulatory domain -A (and so on).



This is called priming. But then I still get the message that the new AP can't JOIN to this controller. In this session, the Cisco expert covered single image orchestration changes with the Cisco IOS XE Software Release 17.2.1r for Cisco IOS XE and Cisco IOS XE SD-WAN use cases. This method should be used for companies that have a small network and do not own a local DNS server.The next easiest method of deployment is to use a DNS entry with DHCP. Where and how your employees work is changing—your workforce can... If the LAP does not receive a join response from its choice, the LAP will try the next controller in the list unless the controller is a configured controller (Primary/Secondary/Tertiary).When it receives the join reply, the AP checks to make sure it has the same image as that of the controller. Only then can the APs register with the WLC.In such cases, you will see this message on the controller in the output of the If you are using a LAP that has a console port, you will see this message when you issue the This again is a clear indication that the LAP is not part of the AP authorization list on the controller.You can view the status of the AP authorization list using this command:In order to add an LAP to the AP authorization list, use the The LAP does not join a controller because of a certificate issue.Use one of these two options in order to resolve the problem:MIC AP -Request a return materials authorization (RMA).This message means that the controller received a discovery request via a broadcast IP address that has a source IP address which is not in any configured subnets on the controller.   This problem I can manage because on the controller I can give an ip-address to the new AP.

This is a two-step process. Choose Access points can renew their IP addresses pretty quickly when trying to join a WLC, which can cause Windows DHCP servers to mark these IPs as "BAD_ADDRESS" which could quickly deplete the DHCP pool. This document gives an overview of the Wireless LAN Controller (WLC) Discovery and Join Process.

Restrict the allowed VLANs on the trunks.If a firewall is used in the enterprise network, ensure that the following ports are enabled on the firewall for the LAP to be able to join and communicate with the controller.TCP 161 and 162 for SNMP (for the Wireless Control System [WCS])These ports are optional (depending on your requirements):This is another common issue that is seen when the AP tries to join the WLC. If a single controller has multiple AP-managers on multiple interfaces, choose the AP-manager interface with the least number of APs.The controller will respond to all discovery requests without checking certificates or AP credentials. Announcing the Project Gallery! This document also provides information on some of the issues why a Lightweight Access Point (LAP) fails to join a WLC and how to troubleshoot the issues.Cisco recommends that you have knowledge of these topics:Basic knowledge of the configuration of LAPs and Cisco WLCsBasic knowledge of Lightweight Access Point Protocol (CAPWAP)In a Cisco Unified Wireless network, the LAPs must first discover and join a WLC before they can service wireless clients.However, this presents a question: how did the LAPs find the management IP address of the controller when it is on a different subnet?If you do not tell the LAP where the controller is via DHCP option 43, DNS resolution of "Cisco-capwap-controller.local_domain", or statically configure it, the LAP does not know where in the network to find the management interface of the controller.In addition to these methods, the LAP does automatically look on the local subnet for controllers with a 255.255.255.255 local broadcast.
The console of the WLC.

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