Installing and Configuring an SNMP Agent on Linux

This section explains how to install and configure the SAS SNMP Agent for the SuSE Linux and Red Hat Linux operating systems.

Perform the following steps to install and configure the SAS SNMP Agent for the SuSE Linux and Red Hat Linux operating systems:

NOTE  This procedure requires that you have the Net-SNMP agent installed on the Linux machine. The RPM has not been created to support -U version. The RPM -U will probably fail with this RPM.

1.	Install the Avago SAS SNMP Agent using the rpm -ivh <sas rpm> command.

NOTE  Before installation, check whether any pass command exists that starts with 1.3.6.1.4.1.3582 OID in snmpd.conf. If so, delete all of the old pass commands that start with 1.3.6.1.4.1.3582 OID. (This situation could occur if an earlier version of the Avago SNMP Agent was installed in the system.)

NOTE  After installation, find the SAS MIB file LSI-AdapterSAS.mib under the /etc/lsi_mrdsnmp/sas directory. RPM makes the necessary modification needed in the snmpd.conf file to run the agent.

The snmpd.conf file structure should be the same as the file structure lsi_mrdsnmpd.conf. For reference, a sample configuration file (lsi_mrdsnmpd.conf) is in the /etc/lsi_mrdsnmp directory.

2.	To run an SNMP query from a remote machine, add the IP address of that machine in the snmpd.conf file, as in this example:

com2sec    snmpclient    172.28.136.112    public

Here, the IP address of the remote machine is 172.28.136.112.

3.	To receive an SNMP trap to a particular machine, add the IP address of that machine in the com2sec section of the snmpd.conf file.

For example, to get a trap in 10.0.0.144, add the following to the snmpd.conf file.

#          sec.name      source        community
com2sec    snmpclient    10.0.0.144    public

4.	To send SNMPv1 traps to a custom port, add the following configuration information to the snmpd.conf file:

Trapsink HOST [community [port] ]

Specify the custom port number; otherwise, the default SNMP trap port, 162, is used to send traps.

5.	To run or stop the snmpd daemon, enter the following command:

/etc/init.d/snmpd start
/etc/init.d/snmpd stop

6.	To start or stop the SAS SNMP Agent daemon before issuing a SNMP query, enter the following command:

/etc/init.d/lsi_mrdsnmpd start
/etc/init.d/lsi_mrdsnmpd stop

You can check the status of the SAS SNMP Agent daemon by checked by entering the following command:

/etc/init.d/lsi_mrdsnmpd status

7.	Issue an SNMP query in this format:

snmpwalk -v1 -c public localhost .1.3.6.1.4.1.3582

8.	You can get the SNMP trap from local machine by issuing the following command:

snmptrapd -P -F "%02.2h:%02.2j TRAP%w.%q from %A %v\n"

NOTE  To receive a trap in a local machine with Net-SNMP version 5.3, you must modify the snmptrapd.conf, file (generally located at /var/net-snmp/snmptrapd.conf). Add the disableAuthorization yes line in the snmptrapd.conf file and then run the sudo snmptrapd -P -F "%02.2h:%02.2j TRAP%w.%q from %A %v\n command.

NOTE  It is assumed that the snmpd.conf file is located in the /etc/snmp directory for the Red Hat operating system and the /etc directory for the SLES operating system. You can change the file location from the /etc/init.d/lsi_mrdsnmpd file.

You can install SNMP without the trap functionality. To do so, set the TRAPIND environment variable to N before running RPM.

Before you install a new version, you must uninstall all previous versions.

For the SLES 10 operating system, perform the following steps to run SNMP:

1.	Copy the /etc/snmp/snmpd.conf file to the /etc/snmpd.conf file.

2.	Modify the /etc/init.d/snmpd file, and change the SNMPDCONF=/etc/snmp/snmpd.conf entry to SNMPDCONF=/etc/snmpd.conf.

3.	Run LSI SNMP rpm.