Users Guide

Conguring The SNMP Agent On Systems Running Supported Red Hat

Enterprise Linux

Server Administrator uses the SNMP services provided by the net-snmp SNMP agent. You can congure the SNMP agent to change the

community name, and send traps to a management station. To congure your SNMP agent for proper interaction with management

applications such as OpenManage Essentials, perform the procedures described in the following sections.

NOTE: For additional details on SNMP conguration, see the operating system documentation.

SNMP Agent Access Control Conguration

The management information base (MIB) branch implemented by Server Administrator is identied by the Object Identier (OID)

1.3.6.1.4.1.674. Management applications must have access to this branch of the MIB tree to manage systems running Server Administrator.

For Red Hat Enterprise Linux and VMware ESXi operating systems, the default SNMP agent conguration gives read-only access for the

public community only to the MIB-II system branch (identied by the 1.3.6.1.2.1.1 OID) of the MIB tree. This conguration does not allow

management applications to retrieve or change Server Administrator or other systems management information outside of the MIB-II

system branch.

Server Administrator SNMP Agent Install Actions

If Server Administrator detects the default SNMP conguration during installation, it attempts to modify the SNMP agent conguration to

give read-only access to the entire MIB tree for the public community. Server Administrator modies the SNMP agent conguration

le /etc/snmp/snmpd.conf by:

• Creating a vew to the entire MIB tree by adding the following line if it does not exist: view all included

• Modifying the default access line to give read-only access to the entire MIB tree for the public community. Server Administrator looks

for the following line: access notConfigGroup "" any noauth exact systemview none none

• If Server Administrator nds the above line, it modies the line as: access notConfigGroup "" any noauth exact all

none none

NOTE

: To ensure that Server Administrator is able to modify the SNMP agent conguration for providing proper access to

systems management data, it is recommended that any other SNMP agent conguration changes be made after installing

Server Administrator.

Server Administrator SNMP communicates with the SNMP agent using the SNMP Multiplexing (SMUX) protocol. When Server

Administrator SNMP connects to the SNMP agent, it sends an object identier to the SNMP agent to identify itself as a SMUX peer.

Because that object identier must be congured with the SNMP agent, Server Administrator adds the following line to the SNMP agent

conguration le, /etc/snmp/snmpd.conf, during installation if it does not exist:

smuxpeer .1.3.6.1.4.1.674.10892.1

Changing The SNMP Community Name

Conguring the SNMP community name determines which systems are able to manage your system through SNMP. The SNMP

community name used by management applications must match an SNMP community name congured on the system running Server

Administrator, so that the management applications can retrieve management information from Server Administrator.

To change the SNMP community name used for retrieving management information from a system running Server Administrator:

1 Open the SNMP agent conguration le, /etc/snmp/snmpd.conf.

2 Find the line that reads: com2sec publicsec default public or com2sec notConfigUser default public.

Setup And Administration