The Simple Network Management Protocol (SNMP) is part of the Internet protocol suite, as defined by the Internet Engineering Task Force (IETF). The SNMP provides a means to monitor and manage network-attached devices. For general information about SNMP, see http://www.snmplink.org/.
This section describes SNMP agents specific to SGI systems and covers the following topics:
snmpd-a4700(8) is the SGI SNMP agent for SGI Altix 450 and SGI Altix 4700 systems. It fetches configuration information, such as, blade information; for example, CPU serial numbers. It also fetches environmental information, such as, fan speed and voltage margins. The Management Information Base (MIB) file describes the data objects to be managed by an Agent within a device. You can view the contents of a MIB file in the /opt/sgi/snmpagents/mibs directory.
The snmpd-a4700 agent fetches the above information using l2cmd by contacting the appropriate L2 console attached to the system. The l2cmd is supplied with the RPM that contains the agent.
When the agent first starts, it collects configuration using the L2 console commands, blade and serial all. For environmental conditions, the L2 command env is used. For more information, see the SGI L1 and L2 Controller Software User's Guide available at http://docs.sgi.com. These operations are performed periodically; once a day for configuration information, once every 10 minutes for environmental information You can change these values using the snmpd-a4700 -C and -E options, respectively (see the snmpd-a4700(8) man page for more information).
This section describes how to configure the snmpd-a4700 agent so it can be used by the snmpd(8) daemon.
To configure the snmpd-a4700 agent to operate with the snmpd daemon, perform the following steps:
Integrate the agent MIB.
On a system running RHEL, modify or create the snmpd /etc/snmp/snmpd.options file. The easiest method is to make sure the following start-up parameters are defined:
# Original option OPTIONS="-Lsd -Lf /dev/null -p /var/run/snmpd.pid -a" # Adding SGI agent OPTIONS="${OPTIONS} -M +/opt/sgi/snmpagents/mibs -m ALL"
On a system running SLES, copy the /opt/sgi/snmpagents/mibs/sgi-a4700-smi.mib file to the /usr/share/snmp/mibs/ directory. Also, if not already done, the remaining /opt/sgi/snmpagents/mibs/ files should also be copied.
Optionally, you can apply the same changes in the global /etc/snmp/snmp.conf file by adding the following two lines:
mibs ALL mibdirs +/opt/sgi/snmpagents/mibs
Configure agent configuration file.
This is where the agent is actually called by snmpd(8) using the pass_persist protocol. Also this is where various monitored events are defined. The file itself contains configuration instructions.
Copy (or append) /opt/sgi/snmpagents/etc/snmpd.a4700.conf to
/opt/sgi/snmpagents/etc/snmpd.local.conf
Do not edit the file directly as it can be replaced later with a RPM package update.The configuration file /opt/sgi/snmpagents/etc/snmpd.local.conf require the L2 console hostname (or IP address ) to be specified. Just substitute _a_l2_hostname_ with the appropriate value.
You can change these values using the snmpd-a4700 -C and -E options, respectively (see the snmpd-a4700(8) man page for more information).
Finally, if the previous update interval intervals have been changed or if it is desired to change the monitoring intervals, the "monitor -r 300" lines should be changed also.
Integrate agent configuration file.
On a RHEL system, modify or create the snmpd /etc/snmp/snmpd.options file and set the following environment variable:
# Add SGI agent configurations OPTIONS="${OPTIONS} -c /opt/sgi/snmpagents/etc/snmpd.local.conf"
On a SLES system, a properly substituted /opt/sgi/snmpa-gents/etc/snmpd.a4700.conf file should be appended to /etc/snmp/snmpd.local.conf.
The sgi-snmpagent-a4700 RPM has the following RPM dependencies:
lkSGI net-snmp sgi-snmpagent-mibs ia32el |
 | Note: Use the chkconfig (8) command to configure ia32el on. |
The sgi-snmpagent-mibs Management Information Base (MIB) file contains all the common MIBs necessary to implement specific MIB for SGI SNMP agents. To integrate them into NET_SNMP snmpd MIB infrastructure, see snmp_config(5). For more information, see the sgi-snmpagent-mibs(8) man page.
The sgi-snmpagent-mibs RPM has no RPM dependencies.
snmpd-xe(8) is the SGI SNMP agent for Altix XE 250 systems (only).
It fetches configuration information from the base management controller (BMC). It also fetches environmental information, such as, fan speed and voltage margins. For further details, please consult the MIB file that comes with the package.
The agent also fetch information from the System Management BIOS (SMBIOS) records present in the system BIOS areas.
The snmpd-xe agent fetches environmental information using the ipmitool(1) utility. Make sure that the ipmitool tool is configured on, as follows:
# chkconfig ipmi on |
By default, unless specified by the command-line option -I, it uses -I open. The ipmitool(1) tool resides in /usr/bin. Also, because the -I open option is used, the /dev/ipmi0, normally is initiated by a /etc/init.d/ipmi start, and is expected to be present in order for ipmitool to work and communicate commands to the BMC.
When the agent first starts, it collects configuration using the ipmitool utility by sending various commands to the BMC. These commands are, as follows:
bmc info
bmc getenables
chassis status
fru print
user summary
user list
chassis poh
sensor list
The environmental operations are performed periodically, that is, once every day for configuration, once every ten minutes for environment. You can change this using command-line options -C and -E, respectively. The agent is normally not manually invoked. It is actually invoked by snmpd(8) via a configuration file. See “snmpd-xe SNMP Configuration”.
The SMBIOS information is obtained by reading /dev/mem and walking every DMI type records found in the system. Below is the list of DMI record type not currently processed by the agent:
5 Memory Controller Information ( obsoleted by record 16 ) 6 Memory Module Information ( obsoleted by record 17 ) 14 Group Associations 15 System Event Log 22 Portable Battery 31 BIS entry point 38 System Power Supply 127 Inactive Records Information 128 End of table 129-255 OEM Records |
This section describes how to configure the snmpd-xe agent so it can be used by the snmpd(8) daemon.
To configure the snmpd-xe agent to operate with the snmpd daemon, perform the following steps:
Integrate agent MIB.
On a system running RHEL, modify or create the snmpd /etc/snmp/snmpd.options file. The easiest method is to make sure the following start-up parameters are defined:
# Original option OPTIONS="-Lsd -Lf /dev/null -p /var/run/snmpd.pid -a" # Adding SGI agent OPTIONS="${OPTIONS} -M +/opt/sgi/snmpagents/mibs -m ALL"
On a system running SLES, the /opt/sgi/snmpagents/mibs/sgi-xe-smi.mib should be copied to /usr/share/snmp/mibs/ directory. Also, if not already done, the remaining /opt/sgi/snmpagents/mibs/ files should also be copied.
Optionally, apply the same changes in the global /etc/snmp/snmp.conf file by adding the following two lines:
mibs ALL mibdirs +/opt/sgi/snmpagents/mibs
Configure agent configuration file.
This is where the agent is actually called by snmpd(8) using the pass_persist protocol. Also, this is where various monitored events are defined. The file itself contains configuration instructions.
Copy (or append) /opt/sgi/snmpagents/etc/snmpd.xe.conf to
/opt/sgi/snmpagents/etc/snmpd.local.conf
Do not edit the file directly as it can be replaced later with a RPM package update.The configuration file /opt/sgi/snmpagents/etc/snmpd.local.conf may be edited if the default update interval need to be changed.
Finally, if the previous update interval intervals have been changed or if it is desired to change the monitoring intervals, the "monitor -r 300" lines should be changed also.
Integrate agent configuration file.
On a RHEL system, modify or create the snmpd /etc/snmp/snmpd.options file and set the following environment variable:
# Add SGI agent configurations OPTIONS="${OPTIONS} -c /opt/sgi/snmpagents/etc/snmpd.local.conf"
On a SLES system, a properly substituted /opt/sgi/snmpa-gents/etc/snmpd.xe.conf file should be appended to /etc/snmp/snmpd.local.conf.
The snmpd-xe RPM has the following RPM dependencies:
lkSGI net-snmp sgi-snmpagent-mibs OpenIPMI /usr/bin/ipmitool |