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LAP Name ip address can't change on WLC

     

     

    Introduction

    When LAP name and IP address is changed on Wireless LAN Controller, It warns with the following message "Controller name is mandatory when controller IP is configured". Why we are getting this message?

    AP无法改名字.png

    Hardware

    Wireless LAN Controller 5508 version 7.0.116

    Solution

    The error message is referring to the High Availability tab on the AP configuration.  You likely have an IP address in the Primary/Secondary/Tertiary field without actually having a Controller Name.   For High Availability, the IP is optional but the name is a requirement.

    When you hit APPLY  there is a config check on the GUI seeing this mismatch in configuration and is warning you that it can't apply the configuration because you are missing the WLC name.   solution would be to remove the IP address from High Availability or to properly configure it with WLC names.

    Configure primary, secondary, and tertiary backup controllers for a specific access point as follows:

    • a.Choose Access Points > All APs to open the All APs page.
    • b.Click the name of the access point for which you want to configure primary, secondary, and tertiary backup controllers.
    • c.Choose the High Availability tab to open the All APs > Details for (High Availability) page

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    • d.If desired, enter the name and IP address of the primary backup controller for this access point in the Primary Controller text boxes.

    Note

    Entering an IP address for the backup controller is optional in this step and the next two steps. If the backup controller is outside the mobility group to which the access point is connected (the primary controller), then you need to provide the IP address of the primary, secondary, or tertiary controller, respectively. The controller name and IP address must belong to the same primary, secondary, or tertiary controller. Otherwise, the access point cannot join the backup controller.

    • e.If desired, enter the name and IP address of the secondary backup controller for this access point in the Secondary Controller text boxes.
    • f.If desired, enter the name and IP address of the tertiary backup controller for this access point in the Tertiary Controller text boxes.
    • g.Click Apply to commit your changes.

    Click Save Configuration to save your changes.

    Details

    High Availability Tab

    The high availability feature is used to help an AP move over to a controller when the current controller fails. The backup and secondary are the 4th and 5th in the order of controllers if primary, secondary, and tertiary controllers are configured under the AP. If the primary, secondary, and tertiary controllers are not configured, then the AP will use the backup primary if the current controller fails.

    Note

    AP does not retain any of the backup primary or secondary controller information if it is rebooted.

    Note

    The backup primary and secondary controller information does not work with the AP fallback feature.

    Note

    If the AP is moved to a new controller with different global backup controllers configured, the AP will take on the new backup controllers.

    Note

    Entering an IP address for the backup controller is optional. If the backup controller is outside the mobility group to which the access point is connected (the primary controller), then you need to provide the IP address of the primary, secondary, or tertiary controller, respectively. The controller name and IP address must belong to the same primary, secondary, or tertiary controller. Otherwise, the access point cannot join the backup controller.

    High Availability Tab

    Parameter

    Description

    Primary Controller

    Name and management IP address of the primary controller.

    Secondary Controller

    Name and management IP address of the secondary controller.

    Tertiary Controller

    Name and management IP address of the tertiary controller.

    AP Failover Priority

    Priority for the access point:

    • Low—Assigns the access point to the level 1 priority, which is the lowest priority level. This is the default value.
    • Medium—Assigns the access point to the level 2 priority.
    • High—Assigns the access point to the level 3 priority.
    • Critical—Assigns the access point to the level 4 priority, which is the highest priority level.

     

    Reference

    This document was generated from the following discussion: LAP Name ip address can't change on WLC

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