Installing SNMP Service in RHEL 6

Installing SNMP Service in RHEL 6

SNMP ( Simple Network Management Protocol (SNMP) agent ) will help us to monitor the system from management utilities. SNMP exposes management data in the form of variables on the managed systems, which describe the system configuration. These variables can then be queried (and sometimes set) by managing applications.

Configure yum repository using RHEL 6 media

1)    Create and configure yum configuration file as below using vi editor.

# vi /etc/yum.repos.d/repo.repo
[repo]

Name= RHEL 6

baseurl=file:///repo

enabled=1

gpgcheck=0

2) Create a mount point and mount the RHEL 6 media [mount point name is specified in the yum configuration file]

# mkdir /repo 

# mount /dev/cdrom /repo/

mount: block device /dev/sr1 is write-protected, mounting read-only

Configuring SNMP service

1) Install the SNMP packages as listed below.
# yum install net-snmp-utils net-snmp-libs net-snmp
# rpm -qa| grep snmp
net-snmp-utils-5.5-31.el6.x86_64
net-snmp-libs-5.5-31.el6.x86_64
net-snmp-5.5-31.el6.x86_64
2) Start the services and make sure that it is running.
# service snmpd start
Starting snmpd:                                            [  OK  ]

# service snmptrapd start
Starting snmptrapd:                                        [  OK  ]
# service snmpd status

snmpd (pid  4035) is running...

# service snmptrapd status

snmptrapd (pid  4049) is running...
3)  Configure the service to start automatically with system boot.
# chkconfig snmpd on

# chkconfig snmptrapd on
# chkconfig --list | grep snmp
snmpd           0:off   1:off   2:on    3:on    4:on    5:on    6:off
snmptrapd       0:off   1:off   2:on    3:on    4:on    5:on    6:off

4)  Edit the SNMP configuration file and add entries as per customer requirement. Below is as a example.
# vi /etc/snmp/snmpd.conf
rwcommunity STRING
5) Reload the services.
# service snmpd reload
Reloading snmpd:                                           [  OK  ]

# service snmptrapd reload

Stopping snmptrapd:                                        [  OK  ]

Starting snmptrapd:                                        [  OK  ]

Note:

We can check the snmp service functionality using the snmpwalk utility.

# snmpwalk -v2c -c STRING 10.30.32.207 system

SNMPv2-MIB::sysDescr.0 = STRING: Linux node1.erc.com 2.6.32-131.0.15.el6.x86_64 #1 SMP Tue May 10 15:42:40 EDT 2011 x86_64

SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10

DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (48233) 0:08:02.33

SNMPv2-MIB::sysContact.0 = STRING: Root <root@localhost> (configure /etc/snmp/snmp.local.conf)

SNMPv2-MIB::sysName.0 = STRING: node1.erc.com