> For the complete documentation index, see [llms.txt](https://docs.editran.onesait.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.editran.onesait.com/documentacion-editran/ibm-editran-v5.3-cics-en/tcp/os390-v2r5-v2r6.-procedures-and-files.md).

# OS390 V2R5-V2R6. Procedures and files

## TCP startup procedure OS390-V2R5-6 <a href="#toc149150257" id="toc149150257"></a>

```cobol
000001 //TCPIPB   PROC PARMS='CTRACE(CTIEZB00)'                               
000003 //* Communication Server/390                                           
000004 //*  SMP/E Distribution Name: EZAEB01G                                 
000006 //*     5647-A01 (C) Copr. IBM Corp. 1991,1997.                        
000007 //*     All rights reserved.                                           
000008 //*     US Government Users Restricted Rights -                        
000009 //*     Use, duplication or disclosure restricted                      
000010 //*     by GSA ADP Schedule Contract with IBM Corp.                    
000011 //*     See IBM Copyright Instructions                                 
000014 //TCPIP    EXEC PGM=EZBTCPIP,                                           
000015 //             PARM='&PARMS',                                          
000016 //             REGION=32M,TIME=1440                                    
000018 //*     The C runtime libraries should be in the system's link list     
000019 //*     or add them via a STEPLIB definition here.  If you add         
000020 //*     them via a STEPLIB, they must be APF authorized with DISP=SHR  
000022 //STEPLIB  DD DSN=TCPIP.SEZALINK,DISP=SHR                              
000023 //         DD DSN=TCPIP.SEZALNK2,DISP=SHR                              
000025 //*     SYSPRINT contains run-time diagnostics from TCPIP. It may be   
000026 //*        a data set or SYSOUT.                                       
000027 //*     ALGPRINT contains run-time diagnostics from TCPIP's Autolog    
000028 //*        task. It should be SYSOUT.                                  
000029 //*     SYSERROR contains error messages from TCPIP that occurred      
000030 //*        while processing the PROFILE.                               
000031 //*                                                                    
000032 //SYSPRINT DD SYSOUT=*,DCB=(RECFM=FB,LRECL=137,BLKSIZE=137)            
000033 //ALGPRINT DD SYSOUT=*,DCB=(RECFM=FB,LRECL=137,BLKSIZE=137)            
000034 //SYSOUT   DD SYSOUT=*,DCB=(RECFM=FB,LRECL=137,BLKSIZE=137)            
000035 //CEEDUMP  DD SYSOUT=*,DCB=(RECFM=FB,LRECL=137,BLKSIZE=137)            
000036 //SYSERROR DD SYSOUT=*                                                  
000037 //*                                                                    
000038 //*        TNDBCSCN is the configuration data set for TELNET DBCS      
000039 //*        transform mode.                                             
000040 //*                                                                    
000041 //*TNDBCSCN DD DSN=SW.TCPIP.SEZAPARM(TNDBCSCN),DISP=SHR                   
000043 //*        TNDBCSXL contains binary DBCS translation table codefiles   
000044 //*        used by TELNET DBCS Transform mode.                         
000045 //*                                                                    
000046 //*TNDBCSXL DD DSN=TCPIP.SEZAXLD2,DISP=SHR                             
000048 //*        TNDBCSER receives debug output from TELNET DBCS Transform   
000049 //*        mode, when TRACE TELNET is specified in the PROFILE data set.
000050 //*                                                                     
000051 //*TNDBCSER DD SYSOUT=*                                                
000053 //*     TCPIP reads the parameters from a data set with name           
000054 //*     TCPIP.nodename.TCPIP or with name TCPIP.PROFILE.TCPIP.         
000055 //*     See the chapter on "Configuring the TCPIP Address Space" in    
000056 //*     the Configuration Guide for more information. A sample of      
000057 //*     such a profile is included in member SAMOPROF of the            
000058 //*     SEZAINST data set.                                             
000059 //*                                                                    
000060 //PROFILE  DD DISP=SHR,DSN=SW.TCPIP.SEZAPARM(CPUBPROF)                    
000062 //*     SYSTCPD explicitly identifies which data set is to be          
000063 //*        used to obtain the parameters defined by TCPIP.DATA.        
000064 //*        The SYSTCPD DD statement should be placed in the TSO logon  
000065 //*        procedure or in the JCL of any client or server executed    
000066 //*        as a background task.  The data set can be any sequential   
000067 //*        data set or a member of a partitioned data set (PDS).       
000068 //*                                                                     
000069 //*     For more information please see "Understanding TCP/IP Data     
000070 //*     Set Names" in the Configuration Guide.                         
000071 //*                                                                    
000072 //SYSTCPD  DD DSN=SW.TCPIP.SEZAPARM(TCPDATAB),DISP=SHR                    
****** **************************** Bottom of Data ****************************
```

## OS390 V2R5-6 profile file.

```
BROWSE    SW.TCPIP.SEZAPARM(CPUBPROF) - 01.12           Line 00000000 Col 001 080
Command ===>                                                  Scroll ===> CSR 
********************************* Top of Data **********************************
;                                                                              
; TCPIP.PROFILE.TCPIP                                                          
; ===================                                                          
;                                                                               
; COPYRIGHT = NONE.                                                            
;                                                                              
; This is a sample configuration file                                          
; for the TCPIP address space.                                                 
;                                                                              
; NOTES:                                                                        
;                                                                              
;    The device configuration statements MUST be changed to match your         
;    hardware and software configuration.                                       
;                                                                              
;    The BEGINVTAM section must be changed to match your VTAM                  
;    configuration.                                                             
;                                                                              
;                                                                              
; For more information about this file, see "Configuring the TCPIP             
; Address Space" and "Configuring the Telnet Server" in the                    
; Configuration Guide.                                                         
;                                                                               
; ----------------------------------------------------------------------       
;                                                                              
;                                                                               
; ----------------------------------------------------------------------       
;                                                                              
; Flush the ARP tables every 20 minutes.                                       
;                                                                              
                                                                               
ARPAGE 20                                                                       
;                                                                              
; You can specify DATASETPREFIX in the PROFILE.TCPIP but it no longer          
; has any affect on the TCP/IP stack.                                           
;                                                                              
; ----------------------------------------------------------------------       
;                                                                               
; Set Telnet time-out to 10 minutes.                                           
;                                                                              
                                                                               
TELNETPARMS                                                                    
    PORT 23                                                                    
    INACTIVE 600                                                               
    TIMEMARK 600                                                                
    SCANINTERVAL 120                                                           
    SMFINIT STD                                                                
    SMFTERM STD                                                                
    WLMCLUSTERNAME TN3270E ENDWLMCLUSTERNAME                                   
ENDTELNETPARMS                                                                 
 
; ----------------------------------------------------------------------       
;                                                                              
; AUTOLOG the following servers.                                               
;                                                                               
                                                                               
AUTOLOG 5                                                                      
;   FTPD JOBNAME FTPD1   ; FTP Server                                           
;   FTPDB                ; FTP Server of CPU-B                              
;   LPSERVE              ; LPD Server                                          
;   NAMESRV              ; Domain Name Server                                  
;   NCPROUT              ; NCPROUTE Server                                     
;   PORTMAP              ; Portmap Server                                      
;   OROUTED              ; RouteD Server                                       
;   RXSERVE              ; Remote Execution Server                             
;   SMTP                 ; SMTP Server                                         
;   OSNMPD               ; SNMP Agent Server                                   
;   SNMPQE               ; SNMP Client                                         
;   TCPIPX25             ; X25 Server                                          
;   SAMSPROC             ; SAMS VANTAGE server                                 
ENDAUTOLOG                                                                     
                                                                               
;                                                                               
; ----------------------------------------------------------------------       
;                                                                              
; Reserve ports for the following servers.                                      
;                                                                              
; NOTES:                                                                       
;                                                                              
;    A port that is not reserved in this list can be used by any user.         
;    If you have TCP/IP hosts in your network that reserve ports               
;    in the range 1-1023 for privileged applications, you should               
;    reserve them here to prevent users from using them.                       
;                                                                              
;    The port values below are from RFC 1060, "Assigned Numbers."              
;                                                                              
                                                                               
PORT                                                                            
     7 UDP MISCSERV            ; Miscellaneous Server                          
     7 TCP MISCSERV                                                            
     9 UDP MISCSERV                                                             
     9 TCP MISCSERV                                                            
    19 UDP MISCSERV                                                            
    19 TCP MISCSERV                                                             
    20 TCP FTPDB     NOAUTOLOG ; FTP Server                                    
    21 TCP FTPDB               ; FTP Server                                    
;   20 TCP OMVS      NOAUTOLOG ; FTP Server                                     
;   21 TCP FTPD1               ; FTP Server                                    
    23 TCP INTCLIEN            ; Telnet Server                                 
    25 TCP SMTP                ; SMTP Server                                   
    53 TCP NAMESRV             ; Domain Name Server                            
    53 UDP NAMESRV             ; Domain Name Server                            
   111 TCP PORTMAP             ; Portmap Server                                
   111 UDP PORTMAP             ; Portmap Server                                
   135 UDP LLBD                ; NCS Location Broker                           
   161 UDP OSNMPD              ; SNMP Agent                                    
   162 UDP SNMPQE              ; SNMP Query Engine                             
   512 TCP RXSERVE             ; Remote Execution Server                       
   514 TCP RXSERVE             ; Remote Execution Server                       
   515 TCP LPSERVE             ; LPD Server                                    
   520 UDP OROUTED             ; RouteD Server                                 
   580 UDP NCPROUT             ; NCPROUTE Server                               
   750 TCP MVSKERB             ; Kerberos                                      
   750 UDP MVSKERB             ; Kerberos                                      
   751 TCP ADM@SRV             ; Kerberos Admin Server                         
   751 UDP ADM@SRV             ; Kerberos Admin Server                         
   777 UDP SAMSPROC            ; SAMS VANTAGE Server                           
  7777 TCP CICSSITD            ; CICS Socket   NOT REQUIRED 
 
 KEEPALIVEOPTIONS                 
     INTERVAL 2                   
 ENDKEEPALIVEOPTIONS              
                                                                               
;                                                                              
; ----------------------------------------------------------------------       
;                                                                              
; Hardware definitions:                                                        
;                                                                               
; NOTE: To use these device and link statements, update the statements         
; to reflect your installation configuration and remove the semicolon          
;                                                                               
                                                                               
;                                                                              
; LOSAB4 osa2 with a Token-Ring and Ethernet adapter.                           
;                                                                              
DEVICE LOSAB4 LCS 1002                                                         
LINK OSAB4TCP IBMTR 0 LOSAB4                                                   
;LINK ETH1  ETHERNET 1 LCS1                                                    
                                                                               
;                                                                               
; LCS2 is a 3172 Model 2 with a FDDI adapter.                                  
;                                                                              
 
;DEVICE LCS2   LCS           BE0                                               
;LINK FDDI1 FDDI     0 LCS2                                                    
                                                                               
;                                                                               
; SNALU0 is an SNA Link.                                                       
;                                                                              
                                                                                
;DEVICE SNALU0 SNAIUCV SNALINK LU000000 SNALINK                                
;LINK SNA1 IUCV     1 SNALU0                                                   
                                                                                
;                                                                              
; ----------------------------------------------------------------------       
;                                                                               
; HOME Internet (IP) addresses of each link in the host.                       
;                                                                              
; NOTE: To use this home statement, update the ipaddress and linknames         
; to reflect your installation configuration and remove the semicolon          
;                                                                              
                                                                                
HOME                                                                           
   192.168.172.088 OSAB4TCP                                                    
                                                                               
;                                                                              
; ---------------------------------------------------------------------        
;                                                                              
; The PRIMARYINTERFACE statement is used to specify which interface            
; is the primary interface.                                                    
;                                                                              
; If PRIMARYINTERFACE is not specified, then the first link in the HOME        
; statement is the primary interface, as usual.                                
;                                                                              
; NOTE: To use this primary statement, update the and linkname                 
; to reflect your installation configuration and remove the semicolon          
;                                                                              
                                                                                
  PRIMARYINTERFACE OSAB4TCP                                                    
                                                                               
;                                                                              
; ----------------------------------------------------------------------       
;                                                                              
; IP routing information for the host.  All static IP routes should            
; be added here.                                                               
;                                                                              
; NOTE: To use this GATEWAY statement, update the addresses and links          
; to reflect your installation configuration and remove the semicolon          
;                                                                              
                                                                                
GATEWAY                                                                        
;                                                                              
; Direct Routes - Routes that are directly connected to my interfaces.         
;                                                                              
; Network  First Hop  Link Name Packet Size  Subnet Mask  Subnet Value         
                                                                                
192.168.172   =       OSAB4TCP     1500           0                            
                                                                               
;                                                                               
; Indirect Routes - Routes that are reachable through routers on my            
;                   network.                                                   
;                                                                               
; Network  First Hop  Link Name Packet Size  Subnet Mask  Subnet Value         
                                                                               
; 193.12.2 130.50.10.1   TR1       2000       0                                 
; 10.5.6.4 193.5.2.10    ETH1      1500       HOST                             
                                                                               
;                                                                               
; Default Route - All packets to an unknown destination are routed             
;                 through this route.                                          
;                                                                               
; Network  First Hop  Link Name Packet Size  Subnet Mask  Subnet Value         
                                                                               
  DEFAULTNET 192.168.172.254 OSAB4TCP  DEFAULTSIZE  0                          
                                                                                
;                                                                              
; ----------------------------------------------------------------------       
;                                                                               
; orouted Routing Information                                                  
;                                                                              
; if you are using orouted, comment out the GATEWAY statement and              
; update the BSDROUTINGPARMS statement to reflect your installation            
; configuration and remove the semicolon                                       
;                                                                              
;    Link     Maxmtu   Metric   Subnet Mask     Dest Addr                      
                                                                               
; BSDROUTINGPARMS false                                                        
;    TR1       2000       0     255.255.255.0   0                              
;    ETH1      1500       0     255.255.255.0   0                              
;    FDDI1  DEFAULTSIZE   0     255.255.255.0   0                              
; ENDBSDROUTINGPARMS                                                           
                                                                               
;                                                                               
; ----------------------------------------------------------------------       
;                                                                              
; Use TRANSLATE to specify the hardware address of a specific IP               
; address.  See the Customization and Administration Guide for more            
; information.                                                                 
;                                                                               
                                                                               
TRANSLATE                                                                      
; A null translate statement issues the warning message EZZ0323I                
                                                                               
;                                                                              
; ----------------------------------------------------------------------        
;                                                                              
; Turn off all tracing.  If tracing is to be used, change the following        
; line.  To trace the configuration component, for example, change             
; the line to ITRACE ON CONFIG 1                                               
;                                                                              
                                                                               
ITRACE OFF                                                                     
                                                                               
;                                                                              
; ----------------------------------------------------------------------       
; The ASSORTEDPARMS NOFWD will prevent the forwarding of IP packets            
; between different networks.  If NOFWD is not specified, IP packets           
; will be forwarded between networks when this host is a gateway.              
;                                                                              
                                                                               
ASSORTEDPARMS                                                                   
  NOFWD                                                                        
ENDASSORTEDPARMS                                                               
; NOFWD            issues the informational message EZZ0334I                   
                                                                               
;                                                                              
; ----------------------------------------------------------------------       
;                                                                              
; Define the VTAM parameters required for the Telnet server.                   
;                                                                               
                                                                               
BEGINVTAM                                                                      
    ; Define logon mode tables to be the defaults shipped with the             
    ; latest level of VTAM                                                     
  TELNETDEVICE 3278-2-E T3270PC ; 24 line screen - default of NSX32702         
  TELNETDEVICE 3279-2-E NSX32702 ; 24 line screen - default of NSX32702        
  TELNETDEVICE 3278-3-E NSX32703 ; 32 line screen - default of NSX32702        
  TELNETDEVICE 3279-3-E NSX32703 ; 32 line screen - default of NSX32702        
  TELNETDEVICE 3278-4-E NSX32704 ; 48 line screen - default of NSX32702        
  TELNETDEVICE 3279-4-E NSX32704 ; 48 line screen - default of NSX32702        
  TELNETDEVICE 3278-5-E NSX32705 ; 132 column screen - default of NSX327       
  TELNETDEVICE 3279-5-E NSX32705 ; 132 column screen - default of NSX327       
    ; Define the LUs to be used for general users.                            
  DEFAULTLUS                                                                  
      TCP00001 TCP00002 TCP00003 TCP00004 TCP00005                            
      TCP00006 TCP00007 TCP00008 TCP00009 TCP00010                            
  ENDDEFAULTLUS                                                               
  LUSESSIONPEND    ; On termination of a Telnet server connection,            
                   ; the user will revert to the DEFAULTAPPL                  
  DEFAULTAPPL TUBESB ; Set the default application for all Telnet             
                    ; sessions to allow CLSDST Pass                           
; LINEMODEAPPL TSB ; Send all line-mode terminals directly to TSO.            
; ALLOWAPPL SAMON QSESSION  ; SAMON appl does CLSDST Pass to next appl        
; ALLOWAPPL TSO* DISCONNECTABLE ; Allow all users access to TSO               
              ; applications.                                                  
              ; TSO is multiple applications all beginning with TSO,          
              ; so use the * to get them all.  If a session is closed,        
              ; disconnect the user rather than log off the user.             
; RESTRICTAPPL IMS ; Only 3 users can use IMS.                                
;   USER USER1     ; Allow user1 access.                                      
;     LU TCPIMS01  ; Assign USER1 LU TCPIMS01.                                
;   USER USER2     ; Allow user2 access from the default LU pool.             
;   USER USER3     ; Allow user3 access from 3 Telnet sessions,                
                   ; each with a different reserved LU.                        
;     LU TCPIMS31 LU TCPIMS32 LU TCPIMS33                                       
  ALLOWAPPL *      ; Allow all applications that have not been                 
                   ; previously specified to be accessed.                      
                                                                                
;   Map Telnet sessions from this node to display USSAPC screen.               
;   USSTAB USSAPC 130.50.10.1                                                  
;                                                                              
;   Map Telnet sessions from this link to display USSCBA screen.               
    USSTCP USSNPAS2 OSAB4TCP                                                   
                                                                                
ENDVTAM                                                                        
                                                                               
;                                                                               
; ----------------------------------------------------------------------       
;                                                                              
; Start all the defined devices.                                               
;                                                                              
; NOTE: To use these START statements, update the device name                  
; to reflect your installation configuration and remove the semicolon          
;                                                                              
                                                                               
  START LOSAB4                                                                  
; START LCS2                                                                   
; START SNALU0                                                                 
******************************** Bottom of Data ********************************
```

&#x20;The differences between OS390 V2R5 and V2R6 are in the TCPCONFIG and UDPCONFIG sub-parameters:

```
PARAMETER OS390 V2R5               MINIMUM             MAXIMUM                  DEFAULT
Tcp_send_buffer_size                 256                256K                  16384 (16K)
Tcp_receive_buffer_size              256                256K                  16384 (16K)
Udp_send_buffer_size                  1                65535                    65535 
Udp_receive_buffer_size               1                65535                    65535 
 
PARAMETER OS390 V2R6               MINIMUM             MAXIMUM                  DEFAULT
Tcp_send_buffer_size                 256                256K                  16384 (16K)
Tcp_receive_buffer_size              256        tcp_max_receive_buffer_size   16384 (16K)
Tcp_max_receive_buffer_size  tcp_receive_buffer_size    512K                     256K
Udp_send_buffer_size                  1                65507                    65507 
Udp_receive_buffer_size               1                65507                    65507  
```

Starting with editran 5.1, it is possible to configure the send and receive buffers in the product panels.

## TCPDATA file OS390 V2R5-6  <a href="#toc149150259" id="toc149150259"></a>

```
BROWSE    SW.TCPIP.SEZAPARM(TCPDATAB) - 01.12           Line 00000000 Col 001 080
 Command ===>                                                  Scroll ===> CSR 
********************************* Top of Data **********************************
;                                                                               
;***********************************************************************       
;                                                                      *       
;   Name of Data Set:     TCPIP.DATA                                   *       
;                                                                      *       
;   COPYRIGHT = NONE.                                                  *       
;                                                                      *       
;   This data, TCPIP.DATA, is used to specify configuration            *       
;   information required by TCP/IP client programs.                    *       
;                                                                      *       
;                                                                      *       
;   Syntax Rules for the TCPIP.DATA configuration data set:            *       
;                                                                      *       
;   (a) All characters to the right of and including a ; will be       *       
;       treated as a comment.                                          *       
;                                                                      *       
;   (b) Blanks and <end-of-line> are used to delimit tokens.           *       
;                                                                      *       
;   (c) The format for each configuration statement is:                *       
;                                                                      *       
;       <SystemName||':'>  keyword  value                              *       
;                                                                      *       
;       where <SystemName||':'> is an optional label that can be       *       
;       specified before a keyword; if present, then the keyword-      *       
;       value pair will only be recognized if the SystemName matches   *       
;       the node name of the system, as defined in the IEFSSNxx        *       
;       PARMLIB member.  This optional label permits configuration     *       
;       information for multiple systems to be specified in a single   *       
;       TCPIP.DATA data set.                                           *       
;                                                                      *       
;       NOTE:  You should define the SystemName in the IEFSSNxx        *       
;              PARMLIB member to be the same as your JES2 or JES3      *       
;              node name.  This is required for correct delivery of    *       
;              SMTP mail.                                              *       
;                                                                      *        
;***********************************************************************       
; TCPIPJOBNAME specifies the name of the started procedure that was            
; used to start the TCPIP address space.    TCPIP is the default.              
;                                                                              
TCPIPUSERID TCPIPB                                                             
TCPIPJOBNAME TCPIPB                                                            
;                                                                               
; HOSTNAME specifies the TCP host name of this system.  If not                 
; specified, the default HOSTNAME will be the node name specified              
; in the IEFSSNxx PARMLIB member.                                              
;                                                                              
; For example, if this TCPIP.DATA data set is shared between 2                 
; systems, OURMVSNAME and YOURMVSNAME, then the following 2 lines              
; will define the HOSTNAME correctly on each system.                           
;                                                                              
;OURMVSNAME:    HOSTNAME  OURTCPNAME                                            
;YOURMVSNAME:   HOSTNAME  YOURTCPNAME                                          
;                                                                              
HOSTNAME  OS390B                                                                
;                                                                              
; DOMAINORIGIN specifies the domain origin that will be appended               
; to host names passed to the resolver.  If a host name contains                
; any dots, then the DOMAINORIGIN will not be appended to the                  
; host name.                                                                   
;                                                                              
DOMAINORIGIN  TEL.INDRA.ES                                                     
;                                                                              
; NSINTERADDR specifies the IP address of the name server.                     
; LOOPBACK (127.0.0.1) specifies your local name server.  If a name            
; server will not be used, then do not code an NSINTERADDR statement.          
; (Comment out the NSINTERADDR line below).  This will cause all names         
; to be resolved via site table lookup.                                        
;                                                                              
;NSINTERADDR  127.0.0.1                                                        
NSINTERADDR  172.29.2.41                  (DNS SERVER)                     
NSINTERADDR  192.168.1.30                 (DNS SERVER)                    
;                                                                              
; NSPORTADDR specifies the foreign port of the name server.                    
; 53 is the default value.                                                     
;                                                                              
NSPORTADDR 53                                                                  
;                                                                              
; RESOLVEVIA specifies how the resolver is to communicate with the             
; name server.  TCP indicates use of TCP virtual circuits.  UDP                
; indicates use of UDP datagrams.  The default is UDP.                         
;                                                                              
RESOLVEVIA TCP                                                                  
;                                                                              
; RESOLVERTIMEOUT specifies the time in seconds that the resolver              
; will wait to complete an open to the name server (either UDP or TCP).        
; The default is 30 seconds.                                                   
;                                                                              
RESOLVERTIMEOUT 30                                                              
;                                                                              
; RESOLVERUDPRETRIES specifies the number of times the resolver                
; should try to connect to the name server when using UDP datagrams.            
; The default is 1.                                                            
;                                                                              
RESOLVERUDPRETRIES 1                                                           
;                                                                               
; TRACE RESOLVER will cause a complete trace of all queries to and             
; responses from the name server or site tables to be written to               
; the user's console.  This command is for debugging purposes only.            
;                                                                              
; TRACE RESOLVER                                                               
;                                                                              
;                                                                              
; You can specify DATASETPREFIX in the PROFILE.TCPIP and TCPIP.DATA            
; data sets.  The character string specified as a parameter on                 
; DATASETPREFIX takes precedence over both the distributed or modified         
; data set prefix name as changed by the EZAPPRFX installation job.            
; If this statement is used in a profile or configuration                      
; data set that is allocated to a client or a server, then                     
; that client or server dynamically allocates additional required data         
; sets using the value specified for DATASETPREFIX as the data set name        
; prefix.  The DATASETPREFIX parameter can be up to 26 characters long         
; and the parameter must NOT end with a period.                                
;                                                                              
; For more information please see "Understanding TCP/IP Data Set               
; Names" in the Customization and Administration Guide.                        
;                                                                               
DATASETPREFIX TCPIP                                                            
;                                                                              
;                                                                               
; MESSAGECASE MIXED indicates to the FTP server, FTP client, TELNET            
; client, and PING client that all messages should be displayed in             
; mixed case.  MESSAGECASE UPPER indicates to the FTP server, FTP              
; client, TELNET client, and PING client that all messages should              
; be displayed in uppercase.  Mixed case inserts in messages will              
; will not be uppercased.                                                       
; If MESSAGECASE is not specified, mixed case messages will be used.           
;                                                                              
; MESSAGECASE MIXED                                                             
; MESSAGECASE UPPER                                                            
;                                                                              
; LOADDBCSTABLES indicates to the FTP server and FTP client which DBCS         
; translation tables should be loaded at initialization time. Remove           
; from the list any tables that are not required. If LOADDBCSTABLES is         
; not specified, no DBCS tables will be loaded.                                
;                                                                              
; LOADDBCSTABLES JIS78KJ JIS83KJ SJISKANJI EUCKANJI HANGEUL KSC5601            
; LOADDBCSTABLES TCHINESE BIG5 SCHINESE                                        
;***********************************************************************       
;                                                                              
; End of file.                                                                  
;                                                                              
******************************** Bottom of Data ********************************
```

NOTE: In OS390 2.6 it adds only one parameter compared to 2.5 (TRACE SOCKET)

## Startup of CICS OS390-V2R5-6.     <a href="#toc149150260" id="toc149150260"></a>

```cobol
 ********************************* TOP OF DATA **********************************
       1 //CICSSITD JOB (EXPL,EXA,1439,200),SYSTEMS,CLASS=G,TIME=1439,       
         //     MSGLEVEL=(1,1),USER=SITD,                                     
         //     MSGCLASS=H                                                    
         //*************************************************                  
         //*     C. I. C. S.  T E S T   S I T E        *                  
         //*                                               *                  
         //*     SNCE    - COBOL II AMODE(31)              *                  
         //*     EDIREAL - COBOL II AMODE(31)              *                  
         //*     EDITRAN - COBOL II AMODE(31)              *                  
         //*************************************************                  
       2 //CICSD    EXEC PGM=DFHSIP,TIME=1439,REGION=32M,                     
         // PARM='SIT=SP,START=COLD'                                          
         //*                                                                  
         //*                                                                  
         //* STEPLIB  DD  DSN=CEE.SCEERUN,DISP=SHR                              
       3 //STEPLIB  DD  DSN=DB2.V3R1M0.SDSNLOAD,DISP=SHR                      
       4 //         DD  DSN=CICS410.SDFHAUTH.SITO,DISP=SHR                    
         XX       DD DSN=TCPIP.DESA.SEZALINK,DISP=SHR
         //*                                                                  
         //********************************************************           
         //*    LOADABLE MODULE LIBRARIES                    *           
         //********************************************************           
       5 //DFHRPL   DD  DSN=CEE.SCEECICS,DISP=SHR                             
       6 //         DD  DSN=CEE.SCEERUN,DISP=SHR                              
       7 //         DD  DSN=CICS410.SDFHLOAD.SITO,DISP=SHR                    
       8 //         DD  DSN=CICS410.SDFHEXCI.SITO,DISP=SHR                    
       9 //         DD  DSN=KI.SGDC.SSASST.LOAD7003,DISP=SHR                  
      10 //         DD  DSN=KI.SGDC.SSASST.LOADEURO,DISP=SHR   3              
      11 //         DD  DSN=KI.SGDC.DSO.LOADV1R0,DISP=SHR      1              
      12 //         DD  DSN=KI.EGDC.LOADINCI,DISP=SHR          1              
      13 //      DD  DSN=KI.EGDC.ZTBP.LOAD,DISP=SHR      1               
      14 //         DD  DSN=KI.SGDC.SSASST.LOADV1R0,DISP=SHR  16               
      15 //         DD  DSN=KI.EGDC.EDI.LOAD31,DISP=SHR                     
      16 //         DD  DSN=KI.EGDC.INT.LOAD,DISP=SHR         13              
      17 //         DD  DSN=CICS410.SIST.MODULOS,DISP=SHR      1              
      18 //         DD  DSN=KI.GCDA.CIFRADO.LOAD,DISP=SHR     16              
      19 //         DD  DSN=KI.EGDC.APL.LOAD31,DISP=SHR       16              
      20 //         DD  DSN=KI.EGDC.ZTBP.LOAD31,DISP=SHR      10              
      21 //         DD  DSN=KI.SGDC.SNPACH.LOADV1R0,DISP=SHR   7              
      22 //         DD DSN=SYS1.SYSVIEW.V72.LOADLIB,DISP=SHR  1               
      23 //         DD  DSN=KI.EIDC.ZTBG.LOAD.VSE,DISP=SHR                    
      24 //         DD  DSN=CW.LOAD,DISP=SHR                                  
      25 //         DD  DSN=TCPIP.SEZATCP,DISP=SHR                            
         //********************************************************           
         //*          RESTART FILES                      *           
         //********************************************************           
         //*                                                                  
      26 //DFHRSD   DD  DSN=CICS410.DFHRSD.SITD,DISP=SHR                      
      27 //DFHGCD   DD  DSN=CICS410.DFHGCD.SITD,DISP=SHR                      
      28 //DFHLCD   DD  DSN=CICS410.DFHLCD.SITD,DISP=SHR                      
      29 //DFHJ01A  DD  DSN=CICS410.JOURNAL1.SITD,DISP=SHR                    
         //*                                                                  
         //********************************************************           
         //*          DUMP FILES                            *           
         //********************************************************           
      30 //DFHDMPA  DD  DSN=CICS410.DFHDMPA.SITD,DISP=SHR                     
      31 //DFHDMPB  DD  DSN=CICS410.DFHDMPB.SITD,DISP=SHR                     
         //***********************************************************        
      32 //COUT     DD  SYSOUT=*,DCB=(RECFM=V,LRECL=132,BLKSIZE=136)          
      33 //SALIDA   DD  SYSOUT=*,DCB=(RECFM=V,LRECL=128,BLKSIZE=136)          
      34 //CSDLOG   DD  SYSOUT=*,DCB=(RECFM=V,LRECL=120,BLKSIZE=128)          
      35 //CEEMSG   DD  SYSOUT=*,DCB=(RECFM=V,LRECL=161,BLKSIZE=165)          
      36 //CEEOUT   DD  SYSOUT=*,DCB=(RECFM=V,LRECL=133,BLKSIZE=137)          
         //**********************************************************         
         //*          C.I.C.S. FILES                        *         
      37 //DMPTABLA DD  DSN=CICS410.DMPTABLA.SITD,DISP=SHR                    
         //*                                                                   
      38 //DFHINTRA DD  DSN=CICS410.DFHINTRA.SITD,DISP=SHR                    
      39 //DFHTEMP  DD  DSN=CICS410.DFHTEMP.SITD,DISP=SHR                     
      40 //DFHCSD   DD  DSN=CICS410.DFHCSD.SITD,DISP=SHR                      
         //********************************************************           
         //*    TD QUEUE                                           *           
         //********************************************************           
         //*                                                                  
      41 //DDEITD   DD  DSN=KI.EIDC.EITD,DISP=SHR                             
      42 //NXC1INTR DD  SYSOUT=(A,INTRDR)                                     
      43 //NXCEINTR DD  SYSOUT=(A,INTRDR)                                     
         //*                                                                  
         //********************************************************           
         //*          TRACE FILES                           *           
         //********************************************************           
         //*                                                                   
      44 //DFHAUXT  DD  DSN=KI.SNCE.TRACE.SITD,DISP=SHR                       
         //*                                                                  
      45 //EDI1INTR   DD  SYSOUT=(A,INTRDR)                                   
      46 //ZTB1INTR   DD  SYSOUT=(A,INTRDR)                                   
      47 //ZTB2INTR   DD  DSN=KI.EIDC.ZTBG.INTR,DISP=MOD                      
      48 //ZTB1INTR   DD  SYSOUT=(A,INTRDR)                                   
         //********************************************************************
      49 //TCPCICS    DD  SYSOUT=H,DCB=(DSORG=PS,RECFM=V,BLKSIZE=136)         
      50 //SYSTCPD    DD  DSN=SW.TCPIP.SEZAPARM(TCPDATAB),DISP=SHR               
         //********************************************************************
         //*                                                                  
         //*   S E Q U E N T I A L   T E R M I N A L S   S I T O      
         //*                                                                   
         //********************************************************************
         //*                                                                  
         //*                                                                  
      51 //CIEG1   DD  UNIT=VIO,SPACE=(TRK,1)                                 
      52 //CIEG2   DD  UNIT=VIO,SPACE=(TRK,1)                                 
      99 //UNIG1   DD  UNIT=VIO,SPACE=(TRK,1)                                 
     100 //UNIG2   DD  UNIT=VIO,SPACE=(TRK,1)                                 
         //********************************************************************
         //*                                                                   
         //*   S E Q U E N T I A L   T E R M I N A L S   E D I T R A N  
         //*                                                                  
         //********************************************************************
         //*                                                                  
         //*                                                                  
     101 //DATSI   DD DSN=KI.SNCE.CICSSITD.DATSI,DISP=SHR                      
     102 //DATSO   DD DSN=KI.SNCE.CICSSITD.DATSO,DISP=SHR                     
     103 //BATCI   DD  DSN=KI.SNCE.CICSSITD.BATCI,DISP=SHR                    
     104 //BATCO   DD  DSN=KI.SNCE.CICSSITD.BATCO,DISP=SHR                    
     105 //CBC1I   DD  UNIT=VIO,SPACE=(TRK,1)                                 
     106 //CBC1O   DD  UNIT=VIO,SPACE=(TRK,1)                                 
         //*                                                                  
         //*-------------------------------------------------------           
         //*          SYSVIEW 7.2 FILES                        *           
         //*-------------------------------------------------------           
         //*                                                                   
     107 //XPFCDUMP DD  SYSOUT=*                                              
     108 //XPFCLOG  DD  SYSOUT=*                                              
     109 //XPFCPARM DD  DSN=CA.SYSVIEW.V72.PARMLIB,DISP=SHR                   
******************************* BOTTOM OF DATA ********************************
```

The SYSTCPD tab points to TCPDATA and is essential if we want to connect via DNS.

The LE370 libraries must be ahead of the TCP libraries.


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