The value of this object identifies the authentication password of Level-2 Hello packets. The password is a string of characters.
If the packet authentication mode is simple, the password is a string of 0 to 16 characters.
If the packet authentication mode is MD5, the password is a string of 0 to 392 characters.
If the packet authentication mode is keychain, the name is a string of 0 to 47 characters.
The length 0 indicates that the authentication password of Level-2 Hello packets is not configured.
When read, it always returns length 0.