| Parameter | Description | Value |
|---|---|---|
| inbound | Specifies SA parameters for incoming packets. | - |
| outbound | Specifies SA parameters for outgoing packets. | - |
| ah | Specifies SA parameters for Authentication Header (AH). If the security proposal applied to an SA uses AH, ah must be configured in the sa string-key command. | - |
| esp | Specifies SA parameters for Encapsulating Security Payload (ESP). If the security proposal applied to an SA uses ESP, esp must be configured in the sa string-key command. | - |
| plain | Indicates the plaintext used for authentication. | - |
| string-plain-key | Specifies the plaintext key. | The value is a string of 1 to 127 case-sensitive characters. |