Cisco 5520 WLC reboot issue in HA configuration

[MParashar]

Hi,

We are using cisco WLC 5520 for our wifi connectivity with HA configured. Since last few days i am observing a strange behaviour from my standby controller which i had never observed earlier. Controller is  rebooting after the below activities:

1. If we are removing uplink patch cord from the standby controller, it starts rebooting with below reboot reason:

Reset reason : none of the ports is connected ,(Version: 8.5.171.0)

Reset time   : Sun Mar 12 05:55:27 2023

Trace back   : 0x428b9d 0x132099f 0x1384d60 0x137db5a 0x1377c9e 0x1327a23 0x3ba6c07dff 0x7f7fcea4839d

2. If we are reconnecting the uplink patch cord, it again starts rebooting with below reason code:

Reset reason : Peer-RMI, peer-RP and management default gateway are reachable ,(Version: 8.5.171.0)

Reset time   : Sun Mar 12 06:20:25 2023

Trace back   : 0x428b9d 0x132099f 0x1384d60 0x137a3fb 0x1377b15 0x1327a23 0x3ba6c07dff 0x7f500635c39d

Both of the controllers had been reconfigured last month due to certain misbehaviour and HA configuration was setup 2 days back. Before reconfiguration, i had never found this kind of misbehaviour from controller's end earlier before.

Thanks in Advance.

[Sandeep Choudhary]

What is the reason of removing uplink port from standby WLC.  I think its a normal behavior of the Cisco controllers. 

Regards

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[MParashar]

Hi Sandeep,

we had configured HA last week. just to test it, I had removed the uplink of active controller. Earlier , i had never observed this kind of behaviour earlier before. We are using cisco since 2017 with similar setup.

[balaji.bandi]

Are you doing any failover tests? why do you need to remove standby WLC uplink ports? (due to any other issues ?)

[MParashar]

Yes, Just to test HA. we are removing it.

[Rich R]

Does it reboot constantly after you reconnect the cable or just once?

Note 8.5.171.0 is quite old now - refer to links below for TAC recommended code versions.

[MParashar]

Thank you for the details. As i mentioned in my query it only reboots once if i connect or disconnects the uplink pacth cord with shared reason code.

[Rich R]

Agreed with @Sandeep Choudhary - it sounds like normal behaviour to me.