How to add Multiple SSID on Cisco AP

1) Add the SSID's to the AP and use the "mbssid guest-mode" command to broadcast it
!
dot11 ssid TESTSSID1
mbssid guest-mode
!
dot11 ssid TESTSSID2
mbssid guest-mode
!

2) enable mbssid globally on your radio-interface

!
interface Dot11Radio0
mbssid
ssid TESTSSID1
ssid TESTSSID2
!