Why SSID changed?

[wfqk]

Hi The original ssid is abc, but recently it become abc 2, and the original abc has not been existed. I think it is related with security, but I do not know why. Thank you

[balaji.bandi]

you mean SSID changing automatically without any change,. then you need to audit your security config,

[wfqk]

Finally I notice once layer 2 security is enabled in wlan, the ssid change as mentioned above. once disable it, the original ssid come back. 

I want the original ssid remain there forever in any situations. Its strange

[Scott Fella]

Security changes should not change the ssid that is being broadcasted. Seems like your device is renaming the ssid to differentiate between the ssid with multiple security settings. Try to delete the old profiles on the device and add it back once you decide on the security method you want. 

[wfqk]

It might be related with PC. One of two PCs always has ssid abc, but second PC has ssid abc 2 once enabling Layer 2 WPA+WPA2/PSK

[Scott Fella]

It is... it is not related to the wireless system.

[MHM Cisco World]

https://superuser.com/questions/850438/remove-the-2-after-the-ssid-on-windows-8-0