Cisco Virtual Wireless Controller Web GUI or management very slow

[mohranj396968]

hi

Cisco Virtual Wireless Controller Web GUI or management very slow to login

im test with firefox.chrome.brave.edge browser and no solve

show sysinfo

Manufacturer's Name. Cisco Systems Inc.
Product Name. Cisco Controller
Product Version... 8.3.122.0
RTOS Version. 8.3.122.0
Bootloader Version.. 8.3.15.96
Emergency Image Version. 8.3.122.0

SNMP Protocols
v1:Disabled v2c:Enabled v3:Enabled
Syslog
Disabled
HTTP Mode
Enabled
HTTPS Mode
Disabled
New Telnet Sessions Allowed
Yes
New SSH Sessions Allowed
Yes
Management via Wireless
Disabled

[Mark Elsen]

 - Check performance stats on the hypervisor  ,make sure the the WLC-VM has sufficient  resources such as CPU and Memory , also look into : https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html , advising to use latest release possible since AireOS is getting old , 

 M.

[mohranj396968]

no performance in esxi panel

cpu :2*2

ram:10

for 57 access point

[Mark Elsen]

 - As stated  consider 8.3.122.0  outdated , check https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html ,

 M.

[mohranj396968]

This problem did not exist until a few days ago
And my Accesspoint are old models, can't I update the controller??

[Mark Elsen]

- Then reboot the controller when possible and check if that can help. Also
look into modernizing your wireless infrastructure ,

M.

[mohranj396968]

Yes, I restarted, but it didn't help
Due to the high cost, we are currently unable to replace the equipment

[Mark Elsen]

- I am out of words, besides other replies urgent business needs must be
handled by TAC (cisco support), but they won't be able to help much because
of outdated software being used to start with,

M.

[balaji.bandi]

check this thread may help you (virtual or physical same issue)

https://community.cisco.com/t5/wireless/its-very-slow-to-access-wlc5508-by-gui/td-p/3867574

Another Option is, just create another VM with the same vWLC version to see is that works as expected and move any test AP to new  vWLC

[Rich R]

Like @Mark Elsen has already said 8.3.122.0 is VERY old so you could be affected by hundreds of different bugs.
@balaji.bandi has highlighted the other most likely cause (https redirection) but it be would be surprising if that suddenly appeared now without you changing anything.  If you changed something - then change it back!  Either way - if you're using https try switching to http for GUI and see if that makes a difference.  Obviously your data (including username/password on login) will then not be encrypted so you'll need to apply appropriate mitigation for that.

You have not mentioned your AP models so consult the compatibility matrix link below for which versions you can run.
At the very least you should update to the latest 8.3.150.0 which will support all the same APs as 8.3.122.0.  Be aware of the field notices linked below as you might need to change date on WLC for APs to be able to download new image (not fixed in 8.3).