SNMP Data Problems

Troubleshooting › SNMP Data Problems

SNMP Data Problems

If you receive any of the following errors, access to SNMP data may not be enabled:

No entries in routing table
SNMP errors returned from the stack’s IP addresses
Listener detectors always trigger

To enable access to SNMP data

Check that the SNMP subagent has been configured in the profile TCP data set.
The TCP/IP subagent must be able to connect to the SNMP agent. To do this, it uses a UNIX Stream socket represented by the file name in the dpiPathNameForUnixStream MIB object.
To set the file name for the UNIX Stream socket, do one of the following:
- Use the dpiPathNameForUnixStream statement in the OSNMPD.DATA file
- Use the -s OSNMPD initialization parameter
- The UNIX stream socket must be a UNIX System Services (USS) Special File. If the file exists, ensure that:
- It has the correct file attributes
- It has permission bits set to allow both read and write
- If the file does not exist, but the file name is specified as described above, the SNMP agent will automatically create it.
To determine the file name, issue the USS command:
```
osnmp  get dpiPathNameForUnixStream.0
```
The file name is displayed—the default file name is /tmp/dpi_socket.
To determine the attributes and permissions, issue the USS command:
```
ls -1 /tmp/dpi_socket
```
The file attributes and permissions are displayed. For example:
```
crw-r-----             1 OMVSKERN SYS1       6,  0 Jan 27 03:35 dpi_socket
```
The first character (c) indicates this is a Special File. The following nine characters show permissions. The values 6 and 0 preceding the date indicate the major and minor node type. The UNIX Stream socket must be major node type 6.
To create the file, use the MKNOD command located in the /usr/sbin directory. For example:
```
cd /usr/sbin
mknod /tmp/dpi_socket c 6 0
```
A character special file is created; major type 6, minor type 0.

For more information, see the following:

IBM's Communications Server IP Configuration for more information about configuring the SNMP Agent and configuring community names
IBM's UNIX System Services Planning Manual for more information about creating special files
IBM's UNIX System Services Command Reference for more information on how to use and interpret USS commands