Link level security is a session level security protocol exchanged during session activation to confirm the identity of the partner LU. This requires the use of an eight character password known to both LUs that comprise the link. The password is not transferred on the session but used to encrypt data. The encrypted data is analyzed by the other LU to determine whether the password is correct or not.
The password is any hexadecimal string, and may be defined in the DLT, or supplied by an operator on a LINK START request. When a password is present, your product invokes LU-LU session verification processing. If verification fails for any reason then link and session activation fails.
Example: Link Level Security
To specify a password of A1B2C3D4 in a DLT definition for SYSB, enter the following command:
DEFLINK LINK=B LU=SYSB TYPE=APPC PASSWORD=A1B2C3D4
If PASSWORD is not specified when defining the DLT and a password is not given in the LINK START command, LU-LU verification is not performed.