The value of the object tmnxLocUsrDbDhcpMaskSufStr specifies
a substring that is stripped off the end of the incoming string
before it is matched against the value configured in the
corresponding object in the tmnxLocUsrDbDhcpTable.
This string can only contain printable ASCII characters.
Character '*' is a wildcard that matches any substring; it can be
escaped by character '\'.
At least one of the values of tmnxLocUsrDbDhcpMaskSufNum and
tmnxLocUsrDbDhcpMaskSufStr must be equal to the default value.