The following table defines parameters for the ipsec esp command.
| Variable | Value | 
|---|---|
| <aes128gcm16-sha256> | 
                                 Specifies the AES cipher with a 128-bit encryption key and GCM block mode.  | 
                        
| <aes256-sha256> | 
                                 Specifies the AES cipher with a 256-bit encryption key and CBC block mode (for QAT performance mode).  | 
                        
| <aes256gcm16-sha256> | 
                                 Specifies the AES cipher with a 256-bit encryption key and GCM block mode.  |