Troubleshooting
Problem
APAR SE19172 includes an API that allows a user to enable proxy ARP from command line versus using iSeries Navigator GUI.
Resolving The Problem
APAR SE19172 includes an API that allows a user to enable proxy ARP from command line versus using
iSeries Navigator GUI.
Following is an example for using the QTOCC4IF API. Once this CL program is created, pass the virtual IP
address as the parameter. This will turn proxy ARP on for that interface.
Example:
PGM PARM(&VIPAIFC)
/* Declare the parameters passed into this module. */
DCL VAR(&VIPAIFC) TYPE(*CHAR) LEN(15)
/* Declare the variables for calling QTOCC4IF. */
DCL VAR(&IFCINF) TYPE(*CHAR) LEN(24)
DCL VAR(&FORMAT) TYPE(*CHAR) LEN(8) +
VALUE('IFCH0100')
DCL VAR(&ERRCODE) TYPE(*CHAR) LEN(8) +
VALUE(X'0000000000000000')
CHGVAR VAR(%SST(&IFCINF 1 4)) VALUE(X'00000018')
CHGVAR VAR(%SST(&IFCINF 5 15)) VALUE(&VIPAIFC)
CHGVAR VAR(%SST(&IFCINF 20 1)) VALUE(X'00')
CHGVAR VAR(%SST(&IFCINF 21 4)) VALUE(X'00000001')
/* Change the virtual IP interface to enable proxy ARP */
CALL PGM(QSYS/QTOCC4IF) PARM(&IFCINF &FORMAT +
&ERRCODE)
ENDPGM
QTOCC4IF API Information
The Change IPv4 Interface (QTOCC4IF) API is used to change selected parameters for an IPv4 interface that
is defined in the system's TCP/IP configuration.
| Required Parameter Group 1 Interface information Input Char(*) 2 Format name Input Char(8) 3 Error code I/O Char(*) |
| Default Public Authority: *USE |
| Threadsafe: Yes |
| Authorities and Locks The caller of this API must be running under a user profile that has input/output system configuration (*IOSYSCFG) special authority. |
| Required Parameter Group Interface Information INPUT; CHAR(*) Contains the characteristics of the IPv4 interface being changed. Format name INPUT; CHAR(8) The format of the interface information parameter. The format name supported is: IFCH0100 Format for adding or changing an IPv4 interface parameter. For the format of the structure, see IFCH0100 Format. Error code I/O; CHAR(*) The structure for returning error information. For the format of the structure, refer to Error Code Parameter documentation in the iSeries Information Center. |
| IFCH0100 Format For detailed descriptions of the fields in this table, see Field Descriptions. ------------------------------------------------------------- |Offset | | | |-----------| | | | Dec | Hex | Type | Field | |-----|-----|-----------|-----------------------------------| | 0 | 0 | BINARY(4) | Length of fixed interface | | | | | information | |-----|-----|-----------|-----------------------------------| | 4 | 4 | CHAR(15) | Internet address | |-----|-----|-----------|-----------------------------------| | 19 | 13 | CHAR(1) | Reserved | |-----|-----|-----------|-----------------------------------| | 20 | 14 | BINARY(4) | Proxy ARP allowed | ------------------------------------------------------------- Field Descriptions Internet address. The IPv4 internet address, in dotted decimal notation, of an interface. Length of fixed interface information. This field contains the number of bytes specified in the fixed portion of the interface information structure. The minimum value for this field is 24. Proxy ARP allowed. This field applies to Opticonnect (*OPC) and Virtual Ethernet interfaces only. For those types of interfaces, this field indicates whether Proxy ARP (Address Resolution Protocol) has been configured to be allowed or not allowed. 0 NO - Proxy ARP not allowed. 1 YES - Proxy ARP allowed. -1 The value does not change. Reserved. A reserved field. This field must be set to zero. Usage Notes Typically, if an error is detected during the change operation, a diagnostic message will be sent to the job log. This diagnostic message will contain details about the error. The API will then either signal the error message TCP2658 or return TCP2658 in the error code structure. Error Messages Message ID Error Message Text CPF3CF1 E Error code parameter not valid. CPF3CF2 E Error(s) occurred during running of &1 API. CPF9872 E Program or service program &1 in library &2 ended. Reason code &3. TCP2658 E &2 &1 not changed. TCP923C E &1 special authority is required. TCP923F E Value for parameter &2 for API &1 not valid. |
Historical Number
409849287
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Document Information
Modified date:
18 December 2019
UID
nas8N1015049