Users Guide

Configuring SNMP Services on Linux
1. Run the command rpm -qa | grep snmp, and ensure that the net-snmp package is installed.
2. Run cd /etc/snmp to navigate to the snmp directory.
3. Open snmpd.conf in the VI editor (vi snmpd.conf).
4. Search snmpd.conf for # group context sec.model sec.level prefix read write notif and ensure that
the values for fields read, write, and notif are set to
all.
5. At the end of the snmpd.conf file, just before Further Information, enter the Open Manage Essentials
Console IP address in the following format:trapsink <OPEN MANAGE ESSENTIALS CONSOLE IP>
<community string> For example, trapsink 10.94.174.190 public.
6. Start the SNMP services (service snmpd restart).
Troubleshooting Receiving SNMP Traps
If you encounter a problem receiving SNMP traps, perform the following steps to troubleshoot and fix the
problem:
1. Check for network connectivity between the two systems. You can do this by pinging one system
from another using the ping <IP address> command.
2. Check the SNMP configuration on the managed node. Ensure that you have specified the
OpenManage Essential console IP address and the community string name in the SNMP services of
the managed node.
For information on setting SNMP on a Windows system, see Configuring SNMP Services on Windows.
For information on setting SNMP on a Linux system, see Configuring SNMP Services on Linux.
3. Ensure that the SNMP Trap service services are running in the Open Manage Essentials system.
4. Check firewall settings to allow UDP 161, 162 ports.
Troubleshooting Discovery of Windows Server 2008–Based Servers
You also have to allow the server discovery. By default, the option is disabled in Windows Server 2008.
1. Click Start → Control Panel → Network and Internet → Network and Sharing Center → Advanced
Sharing Setting.
2. Choose the drop-down arrow for the applicable network profile (Home or Work / Public) and under
Network Discovery, select Turn on network discovery.
Troubleshooting SNMP Traps for ESX or ESXi Versions 3.5, 4.x, or 5.0
Details: To generate virtual machine and environmental traps from ESX or ESXi 3.5 or 4.x hosts, configure
and enable the embedded SNMP agent. You cannot use the Net-SNMP-based agent to generate these
traps, although it can receive GET transactions and generate other types of traps.
This represents a change in behavior from ESX 3.0.x, in which the configuration file for the Net-SNMP-
based agent controlled the generation of virtual machine traps
Solution: Use the vicfg-snmp command from the Remote CLI or vSphere CLI to enable the SNMP
agent and configure trap destinations. Each time you specify a target with the vicfg-snmp command, the
settings you specify overwrite all previously specified settings. To specify multiple targets, specify them in
a single command, separated by commas.
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