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Link level security is a session level security protocol exchanged during session activation to confirm the identity of the partner LU. This confirmation 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 other LU analyzes the encrypted data to determine whether the password is correct.
The password is a 2- to 16-byte hexadecimal string. The string is defined on the DEFLINK command 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 X'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.
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