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Cisco Bug: CSCvh80539 - Controller uptime is given higher priority than the client load or AP MAC in Master AP election step

Last Modified

Sep 11, 2019

Products (1)

  • Cisco Aironet 1850 Series Access Points

Known Affected Releases

all

Description (partial)

Symptom:
We need to update the configuration and deployment guide regarding with Master AP election in case of Master AP failover.


https://www.cisco.com/c/en/us/td/docs/wireless/access_point/mob_exp/86/user_guide/b_ME_User_Guide_86/appendix.html

"This process is based on Virtual Router Redundancy Protocol (VRRP) and algorithmically determines the next master AP, based on the following parameters listed in the order of descending precedence:

    The AP configured as VRRP master, using the VRRP command config ap next-preferred-master on the controller's CLI.

    The AP with the least load in terms of the number of associated clients associated.

    Among APs with a similar client load, the AP with the lowest MAC address. "

Should be changed to;

"This process is based on Virtual Router Redundancy Protocol (VRRP) and algorithmically determines the next master AP, based on the following parameters listed in the order of descending precedence:

    The AP having higher controller uptime than other ME capable APs

    The AP configured as VRRP master, using the VRRP command config ap next-preferred-master on the controller's CLI.

    The AP with the least load in terms of the number of associated clients associated.

    Among APs with a similar client load, the AP with the lowest MAC address. "


https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-3/b_Cisco_Mobility_Express_Deployment_Guide/b_Cisco_Mobility_Express_Deployment_Guide_chapter_01001.html

"The Master AP election priorities are as follows:

    User Defined Master—"

should be changed to;

"The Master AP election priorities are as follows:

    Highest controller uptime - Access Point with the highest controller uptime gets elected as the Master AP regardless of any other below priorities.
    User Defined Master—"

Conditions:
Master AP failover
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