Reboot WLC 3504 HA Pair without wifi service outage

[santa]

Hi,

we have a pair of WLC 3504 and we need to reboot them in order to install a new certificate just uploaded. 

Is there any chance for reboot one device per time in order to don't interrupt the wireless service? 

We see the cli command: reset system self.

It will help us?

Thank you

[jagan.chowdam · Accepted solution]

As per WLC HA SSO deployment guide, certificates are not replicated from primary to secondary controller in a HA SSO scenario.

So,

• You first need to install the certificates on your active controller.
• Then issue a "redundancy force-switchover" command on your active WLC which will make your standby become active.
• Now install the certificate on the new active controller (original Standby).
• Once the pair is in sync, issue another "redundancy force-switchover" and bring up you original primary to be active.

This method will not cause any downtime.

Make sure to verify HA status before, during and after installing the certificates. 

CJ

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[Scott Fella]

@jagan.chowdam is 100% correct.  This is exactly how it's done "for anything that does not sync" between the pairs.

[patoberli]

To add one little detail. When you redundancy force-switchover the previously active WLC will actually reboot and thus activate the new certificate.