If you have set RBM and you can’t log into your Datapower appliance:
Open a an SSH session and login to your appliance (if SSH is enable on appliance)
Putty -> <DataPower IP> -> Port 22 -> enter Super Admin Username and Password
Execute to following commands to reset RBM:
xi50>co
xi50 (config)>rbm
xi50(config rbm)>reset
xi50(config rbm)>exit