IBM AS/400 Monitoring Principles
The following protocols are used to monitor an AS/400 host:
- SNMP: SNMP must be configured on the AS/400 host, and the ServiceNav Box must also be configured
- Via telnet: direct command execution on the AS/400 and syntax analysis of the results on the ServiceNav Box side. A user is required on the AS/400.
- Via API and calling functions of the monitoring library (RPG) installed on the AS/400 host: an AS/400 user is required
- Via Java API JTOpen/TCP: a user is required on the AS/400 side
The AS/400 must be able to communicate with the ServiceNav Box. Therefore, Option 12 'Host Servers' must be installed and active on the AS/400.
The UDP/161 port must be open from the ServiceNav Box to the AS/400. All UDP ports must be open from the AS/400 to the ServiceNav Box.
Set up SNMP community : public => CFGTCP / option 20 / option 1 / option 2 = Work with communities for SNMP
Make sure that the SNMP service auto starts : => CFGTCP / option 20 / option 1 / option 1 =Change SNMP attributes param AUTOSTART *YES
AS/400 communicates via SNMP on UDP ports other than UDP/161. You must therefore allow incoming communication on all UDP ports from the AS/400.
- Connect via SSH to the ServiceNav Box
- Locate the local network interface name of the ServiceNav Box
- Edit /etc/init.d/iptables.sh
- Add the following lines:
## Accept incoming UDP connections to receive AS400 SNMP responses
iptables -A INPUT -p udp -i <The ServiceNav Box's local interface -s -j ACCEPT
- Reload the ServiceNav Box firewall configuration by executing the command:
To check the configuration, perform a ServiceNav discovery of the AS/400 host using the ServiceNav Box, as shown here.
AS/400 configuration for API use
The following TCP ports must be open from the ServiceNav Box to the AS/400 host: 8470, 8473, 8475, 8476 and 449.
An AS/400 user must be specified. The minimum rights of this user must be the same as those of a local AS/400 user having access to the data collected by the service template, and therefore depends on the used service templates. A user with the following profile will work:
User class: *SYSOPR
NAGIOS user profile Display sign-on information *NO ==> - CHGUSRPRF USRPRF(NAGIOS) DSPSGNINF(*NO)
The following service templates use telnet and parse the received information on the ServiceNav Box:
On the ServiceNav Box, the language to be configured in the services, in the OS languagefield, is that of the AS400 user:
Collection via JAVA API
The following service templates require access to the JAVA API on the AS/400 host:
Collection via JAVA API and calling of RPG functions
The following service templates require a library to be installed on the AS/400 server:
This library is available from the software editor through the usual product support channel.
To install the library on the AS/400:
- Download the two SAVF files to the AS/400
- Run the RSTLIB command for each file