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where is my cisco certification.19.2.2 Upgrading the APUpgrading the AP is fairly simple. In fact, if you follow the procedure previously described, you are done, as the AP will synchronize with the controller. In Figure 19.3, you verified the software version of the AP, which is the same as the controller, both of which are 4XP 192.17M (Mesh) versions. After the controller has been upgraded to software version 5.0.148.0, you can verify the client again by selecting WIRELESSAllAPs and clicking on the name of the AP that needs to be verified. In Figure 19.7, the Lobby-AP has been selected, and according to the information in Software Version, it has been upgraded to version 5.0.148.0, which matches the controller version. Remember, when the controller software is upgraded, the AP software is also automatically upgraded, but only 20 APs can be upgraded at any given time.Figure 19-7 Verifying an AP Upgrade19.2 Basic Topics 320Step 3 Select the Controller check box for the controller you want to upgrade. Select SelectaCommand > Download Software, and click the GO button. WCS displays the DownloadSoftwaretoController page. Step 4 If you are using the built-in WCSTFTP server, check the TFTPServer onWCS System check box. If you are using an external TFTP server, be (J uncheck the check box and add the external TFTP server IP address.Figure 19-7 Verifying AP Upgrades321 Chapter 19 Maintaining the Wireless NetworkAP synchronization with the controller means that the following facts hold true. And 20 If the controller has a higher version, the AP is upgraded. Ning Shio If the controller has a lower version, the AP is downgraded.If the AP leaves one controller to associate with another controller, the AP reviews that controller version and upgrades/downgrades as needed.19.2.3 Upgrading WCS