45 -
SNMP BASICS -P2
HOW TO INSTAALL AND
CONFIGURE SNMP IN LINUX (RHEL6 & RHEL7),
The purpose of installing
SNMP (Simple Network Transfer Protocol) is to monitor host resources like CPU,
Memory, Network and Disk Utilization etc.
Required
Packages,
net-snmp,
net-snmp-libs, net-snmp-utils
net-snmp The SNMP Agent Daemon and documentation. This
package is required for exporting performance data.
net-snmp-libs The netsnmp library and the bundled
management information bases (MIBs). This package is required for exporting
performance data.
net-snmp-utils SNMP clients such as snmpget and snmpwalk. This
package is required in order to query a system's performance data over SNMP.
Default Configuration File,
/etc/snmp/snmpd.conf
Daemon,
snmpd
[root@rhel7-server ~]# cat /etc/sysconfig/snmpd
#
snmpd command line options
#
'-f' is implicitly added by snmpd systemd unit file
#
OPTIONS="-LS0-6d"
What
is this “OPTIONS” flag in /etc/sysconfig/snmpd
SNMP
daemon startup attribute(s)
L Logging
S Syslog
D Daemon
-Ls Log messages via syslog
Syslog
Daemon Options
-Lsd Log Syslog Daemon (default)
-Lsd Log Syslog Warning Message
-LSwd
or -Ls4d Log Syslog Error Message
Logging
Facility Table
Numeric
Character Log Logging
Purpose
-Value -Value -Type
0 ! LOG_EMERG Emergencies
– System is unusable
1 a LOG_ALERT Alerts
– Immediate action needed
2 b LOG_CRIT Critical
– Critical conditions
3 c LOG_ERR Error
– Error conditions
4 e LOG_WARNING Warnings
– Warning conditions
5 n LOG_NOTICE Notifications
– Informational messages
6 i LOG_INFO Informational – Normal but significant
conditions
7 d LOG_DEBUG Debug – Debugging messages
Let’s
search snmp packages are available in our system or not,
[root@rhel7-server ~]# rpm -qa |grep net-snmp*
net-snmp-5.7.2-18.el7.x86_64
net-snmp-libs-5.7.2-18.el7.x86_64
net-snmp-agent-libs-5.7.2-18.el7.x86_64
net-snmp-utils-5.7.2-18.el7.x86_64
All
required packages are available, if not available then we can install them via
yum install.
# yum install -y net-snmp net-snmp-utils net-snmp-libs
Loaded plugins: langpacks, product-id,
subscription-manager
This system is not registered to Red Hat
Subscription Management. You can use subscription-manager to register.
localrepo
| 2.9 kB 00:00:00
Package 1:net-snmp-5.7.2-18.el7.x86_64 already
installed and latest version
Package 1:net-snmp-utils-5.7.2-18.el7.x86_64 already
installed and latest version
Package 1:net-snmp-libs-5.7.2-18.el7.x86_64 already
installed and latest version
Nothing to do
# mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.org
If
we cat the default “/etc/snmp/snmpd.conf” file, we can see it’s a long and
heavily commented file.
To
see the uncommented values,
# grep -v "^$" /etc/snmp/snmpd.conf | grep -v '^ *#'
com2sec notConfigUser default
public
group
notConfigGroup v1
notConfigUser
group notConfigGroup v2c notConfigUser
view
systemview included .1.3.6.1.2.1.1
view
systemview included .1.3.6.1.2.1.25.1.1
access
notConfigGroup ""
any noauth exact
systemview none none
syslocation Unknown (edit /etc/snmp/snmpd.conf)
syscontact Root <root@localhost> (configure
/etc/snmp/snmp.local.conf)
dontLogTCPWrappersConnects yes
Intersection of snmpd.conf
com2sec NAME SOURCE COMMUNITY
This
directive specifies the mapping from a source/community pair to a security
name. SOURCE can be a hostname, a subnet, or the word "default". A subnet can be specified as IP/MASK or
IP/BITS. For example, given a directive "com2sec myLocal 10.10.10.0/24
public" then this would match requests from IP addresses 10.10.10.0
through to 10.10.10.255, but not one from 10.10.11.1 or similar. The first
source/community combination
that
matches the incoming packet is selected.
DEFAULT VALUE,
# sec.name source
community
com2sec
notConfigUser default public
REPLACE WITH,
com2sec
local localhost public
com2sec
mynetwork 192.168.0.0/24 public
group NAME MODEL SECURITY
This
directive defines the mapping from securitymodel/security-name
to group. MODEL is one of v1, v2c, or usm.
DEFAULT VALUE,
# groupName securityModel securityName
group notConfigGroup v1 notConfigUser
group notConfigGroup v2c notConfigUser
REPLACE WITH,
group
MyRWGroup v1 local
group
MyRWGroup v2c local
group
MyRWGroup usm local
group
MyROGroup v1 mynetwork
group
MyROGroup v2c mynetwork
group
MyROGroup usm mynetwork
view NAME TYPE SUBTREE [MASK]
This
defines the named view. TYPE is either
included or
excluded. MASK is a list of hex octets, separated by
'.' or
':'.
The MASK defaults to "ff" if not specified.
The
reason for the mask is, that it allows you to control access
to
one row in a table, in a relatively simple way.
.1
will give access to entire tree.
DEFAULT VALUE,
# name incl/excl subtree mask(optional)
view systemview included
.1.3.6.1.2.1.1
REPLACE WITH,
view
all included .1 80
access NAME CONTEXT MODEL LEVEL PREFX READ WRITE NOTIFY
The
access directive maps from group/security model/security
level
to a view. MODEL is one of any, v1, v2c, or usm. LEVEL
is
one of noauth, auth, or priv. PREFX specifies how CONTEXT
should
be matched against the context of the
incoming pdu,
either
exact or prefix. READ, WRITE and NOTIFY
specifies the
view
to be used for the corresponding access.
For v1 or v2c
access,
LEVEL will be noauth, and CONTEXT will be empty.
DEFAULT VALUE,
#group
context sec.model
sec.level prefix read write notif
access notConfigGroup "" any noauth exact
systemview none none
REPLACE WITH,
access
MyROGroup "" any noauth
exact all none
none
access
MyRWGroup "" any noauth
exact all all
none
DEFAULT VALUE,
syslocation
Unknown (edit /etc/snmp/snmpd.conf)
syscontact
Root <root@localhost> (configure /etc/snmp/snmp.local.conf)
REPLACE WITH,
syslocation
MY-SNMP-LAB , 192.168.135.133
syscontact
Anurag <anurag@localhost.com>
Now final snmpd.conf will
look like as,
[root@rhel7-server ~]# cat /etc/snmp/snmpd.conf
com2sec
local localhost public
com2sec
mynetwork 192.168.0.0/24 public
group
MyRWGroup v1 local
group
MyRWGroup v2c local
group
MyRWGroup usm local
group
MyROGroup v1 mynetwork
group
MyROGroup v2c mynetwork
group
MyROGroup usm mynetwork
view
all included .1 80
access
MyROGroup "" any noauth
exact all none
none
access
MyRWGroup "" any noauth
exact all all
none
syslocation
MY-SNMP-LAB, 192.168.135.133
syscontact
Anurag anurag@localhost.com
Activate
at boot and start the snmp service,
[root@rhel7-server ~]# systemctl enable snmpd
ln -s '/usr/lib/systemd/system/snmpd.service'
'/etc/systemd/system/multi-user.target.wants/snmpd.service'
[root@rhel7-server ~]# systemctl start snmpd
[root@rhel7-server ~]# systemctl status snmpd
snmpd.service - Simple Network Management Protocol
(SNMP) Daemon.
Loaded:
loaded (/usr/lib/systemd/system/snmpd.service; enabled)
Active:
active (running) since Sat 2018-09-08 18:52:52 IST; 6 days ago
Main PID:
17803 (snmpd)
CGroup:
/system.slice/snmpd.service
└─17803 /usr/sbin/snmpd -LS0-6d -f
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 08 18:53:03 rhel7-server snmpd[17803]:
Connection from UDP: [127.0.0.1]:44373->[127.0.0.1]:161
Sep 15 17:15:50 rhel7-server systemd[1]: Started
Simple Network Management Protocol (SNMP) Daemon..
# snmpwalk -v2c -c public localhost system |more -10
SNMPv2-MIB::sysDescr.0 = STRING: Linux rhel7-server
3.10.0-121.el7.x86_64 #1 SMP Tue Apr 8 10:48:19 EDT 2014
x86_64
SNMPv2-MIB::sysObjectID.0 = OID:
NET-SNMP-MIB::netSnmpAgentOIDs.10
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks:
(17294) 0:02:52.94
SNMPv2-MIB::sysContact.0 = STRING: Anurag
<anurag@localhost.com>
SNMPv2-MIB::sysName.0 = STRING: rhel7-server
SNMPv2-MIB::sysLocation.0 = STRING: MY-SNMP-LAB,
192.168.135.133
SNMPv2-MIB::sysORLastChange.0 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORID.1 = OID:
SNMP-MPD-MIB::snmpMPDCompliance
SNMPv2-MIB::sysORID.2 = OID:
SNMP-USER-BASED-SM-MIB::usmMIBCompliance
Though
the above snmpd configuration is working but from below commands we can see
that they are unable to parse MIB’s.
# snmpget -v 1 -c "public" localhost .1.3.6.1.4.1.40310.1
Error in packet
Reason: (noSuchName) There is no such variable name
in this MIB.
Failed object: SNMPv2-SMI::enterprises.40310.1
# snmpwalk -v 1 -c public localhost .1
End
of MIB
# snmpget -v 1 -c "public" localhost
.1.3.6.1.4.1.2021.9.1.7.1
Error in packet
Reason: (noSuchName) There is no such variable name
in this MIB.
Failed object: UCD-SNMP-MIB::dskAvail.1
# snmpwalk -v 1 -c public Server_IP .1.3.6.1.4.1.2021.50
getaddrinfo: Server_IP Temporary failure in name
resolution
snmpwalk: Unknown host (Server_IP) (Resource
temporarily unavailable)
# snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.50
End
of MIB
Let’s check with another
configuration of snmpd,
[root@rhel7-server ~]# vi /etc/snmp/snmpd.conf
# sec.name
source community
com2sec
local localhost private
com2sec
mynet 192.168.135.0/24 public
com2sec
public default public
com2sec6
mynet fec0::/64 public
# sec.model sec.name
group
mygroup v1 mynet
group
mygroup v2c mynet
group
mygroup usm mynet
group
local v1
local
group
local v2c local
group
local usm local
group
public v1 public
group
public v2c public
group
public usm public
# incl/excl subtree mask
view
all included .1 80
view
system included system fe
view
mib2 included
.iso.org.dod.internet.mgmt.mib-2 fc
# context sec.model sec.level prefix
read write notify
access
mygroup "" any noauth exact mib2
none none
access
public "" any noauth exact system none none
access
local "" any noauth
exact all all all
syslocation
MY-SNMP-LAB , 192.168.135.133
syscontact
Anurag <anurag@localhost.com>
Restart
the snmpd service,
[root@rhel7-server ~]# systemctl restart snmpd
# snmpget -v 1 -c "public" localhost
.1.3.6.1.4.1.2021.9.1.7.1
Error in packet
Reason: (noSuchName) There is no such variable name
in this MIB.
Failed object: UCD-SNMP-MIB::dskAvail.1
# snmpget -v 1 -c "public" localhost .1.3.6.1.4.1.40310.1
Error in packet
Reason: (noSuchName) There is no such variable name
in this MIB.
Failed object: SNMPv2-SMI::enterprises.40310.1
[root@rhel7-server ~]# snmpwalk localhost -c public -v1
SNMPv2-MIB::sysDescr.0 = STRING: Linux rhel7-server
3.10.0-121.el7.x86_64 #1 SMP Tue Apr 8 10:48:19 EDT 2014 x86_64
SNMPv2-MIB::sysObjectID.0 = OID:
NET-SNMP-MIB::netSnmpAgentOIDs.10
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks:
(10961) 0:01:49.61
SNMPv2-MIB::sysContact.0 = STRING: Anurag
<anurag@localhost.com>
SNMPv2-MIB::sysName.0 = STRING: rhel7-server
SNMPv2-MIB::sysLocation.0 = STRING: MY-SNMP-LAB ,
192.168.135.133
SNMPv2-MIB::sysORLastChange.0 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORID.1 = OID:
SNMP-MPD-MIB::snmpMPDCompliance
SNMPv2-MIB::sysORID.2 = OID:
SNMP-USER-BASED-SM-MIB::usmMIBCompliance
SNMPv2-MIB::sysORID.3 = OID:
SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance
SNMPv2-MIB::sysORID.4 = OID: SNMPv2-MIB::snmpMIB
SNMPv2-MIB::sysORID.5 = OID: TCP-MIB::tcpMIB
SNMPv2-MIB::sysORID.6 = OID: IP-MIB::ip
SNMPv2-MIB::sysORID.7 = OID: UDP-MIB::udpMIB
SNMPv2-MIB::sysORID.8 = OID:
SNMP-VIEW-BASED-ACM-MIB::vacmBasicGroup
SNMPv2-MIB::sysORID.9 = OID:
SNMP-NOTIFICATION-MIB::snmpNotifyFullCompliance
SNMPv2-MIB::sysORID.10 = OID:
NOTIFICATION-LOG-MIB::notificationLogMIB
SNMPv2-MIB::sysORDescr.1 = STRING: The MIB for
Message Processing and Dispatching.
SNMPv2-MIB::sysORDescr.2 = STRING: The management
information definitions for the SNMP User-based Security Model.
SNMPv2-MIB::sysORDescr.3 = STRING: The SNMP
Management Architecture MIB.
SNMPv2-MIB::sysORDescr.4 = STRING: The MIB module
for SNMPv2 entities
SNMPv2-MIB::sysORDescr.5 = STRING: The MIB module
for managing TCP implementations
SNMPv2-MIB::sysORDescr.6 = STRING: The MIB module
for managing IP and ICMP implementations
SNMPv2-MIB::sysORDescr.7 = STRING: The MIB module
for managing UDP implementations
SNMPv2-MIB::sysORDescr.8 = STRING: View-based Access
Control Model for SNMP.
SNMPv2-MIB::sysORDescr.9 = STRING: The MIB modules
for managing SNMP Notification, plus filtering.
SNMPv2-MIB::sysORDescr.10 = STRING: The MIB module
for logging SNMP Notifications.
SNMPv2-MIB::sysORUpTime.1 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.2 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.3 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.4 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.5 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.6 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.7 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.8 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.9 = Timeticks: (1)
0:00:00.01
SNMPv2-MIB::sysORUpTime.10 = Timeticks: (1) 0:00:00.01
End of MIB
Checking
same from remote machine,
# snmpwalk -v 2c -c public 192.168.135.133 system
Timeout:
No Response from 192.168.135.133
You
have new mail in /var/spool/mail/root
# snmpwalk -v 2c -c public 192.168.135.133:161 system
Timeout:
No Response from 192.168.135.133:161
It might
possible that firewall is blocking the request,
Let’s
allow snmp via firewall at “192.168.135.133”
# firewall-cmd --zone=public --add-port=161/udp --permanent
success
# firewall-cmd --zone=public --add-port=161/tcp --permanent
success
# firewall-cmd --zone=public --add-port=162/udp --permanent
success
# firewall-cmd --zone=public --add-port=162/tcp --permanent
success
# firewall-cmd --reload
Success
Now check again,
# snmpwalk -v 2c -c public 192.168.135.133:161
system |head -10
SNMPv2-MIB::sysDescr.0 =
STRING: Linux rhel7-server 3.10.0-121.el7.x86_64 #1 SMP Tue Apr 8 10:48:19 EDT
2014 x86_64
SNMPv2-MIB::sysObjectID.0
= OID: NET-SNMP-MIB::netSnmpAgentOIDs.10
DISMAN-EVENT-MIB::sysUpTimeInstance
= Timeticks: (43908) 0:07:19.08
SNMPv2-MIB::sysContact.0 =
STRING: Anurag <anurag@localhost.com>
SNMPv2-MIB::sysName.0 =
STRING: rhel7-server
SNMPv2-MIB::sysLocation.0
= STRING: MY-SNMP-LAB , 192.168.135.133
SNMPv2-MIB::sysORLastChange.0
= Timeticks: (1) 0:00:00.01
SNMPv2-MIB::sysORID.1 =
OID: SNMP-MPD-MIB::snmpMPDCompliance
SNMPv2-MIB::sysORID.2 =
OID: SNMP-USER-BASED-SM-MIB::usmMIBCompliance
SNMPv2-MIB::sysORID.3 =
OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance
# snmpwalk -Os -c public -v1
192.168.135.133 SNMPv2-MIB::sysDescr.0
sysDescr.0 = STRING: Linux
rhel7-server 3.10.0-121.el7.x86_64 #1 SMP Tue Apr 8 10:48:19 EDT 2014 x86_64
# snmpwalk -Os -c public -v1
192.168.135.133 SNMPv2-MIB::sysUpTime.0
sysUpTimeInstance =
Timeticks: (89648) 0:14:56.48
OID Description
HOST-RESOURCES-MIB::hrSystem Contains general system information such as
uptime, number of users, and number of running processes.
HOST-RESOURCES-MIB::hrStorage Contains data on memory and file system
usage.
HOST-RESOURCES-MIB::hrDevices Contains a listing of all processors,
network devices, -- and file systems.
HOST-RESOURCES-MIB::hrSWRun Contains
a listing of all running processes.
HOST-RESOURCES-MIB::hrSWRunPerf Contains memory and CPU statistics on the
process table from HOST- RESOURCES-MIB::hrSWRun.
HOST-RESOURCES-MIB::hrSWInstalled Contains a
listing of the RPM database.
# snmptable -v 2c -c public
192.168.135.133 HOST-RESOURCES-MIB::hrFSTable
SNMP table:
HOST-RESOURCES-MIB::hrFSTable
hrFSIndex
hrFSMountPoint hrFSRemoteMountPoint hrFSType hrFSAccess
hrFSBootable hrFSStorageIndex hrFSLastFullBackupDate hrFSLastPartialBackupDate
1 "/" ""
HOST-RESOURCES-TYPES::hrFSOther readWrite true 31 0-1-1,0:0:0.0 0-1-1,0:0:0.0
6
"/dev/shm"
"" HOST-RESOURCES-TYPES::hrFSOther readWrite false 36 0-1-1,0:0:0.0 0-1-1,0:0:0.0
8 "/run" ""
HOST-RESOURCES-TYPES::hrFSOther readWrite false 38 0-1-1,0:0:0.0 0-1-1,0:0:0.0
9 "/sys/fs/cgroup" ""
HOST-RESOURCES-TYPES::hrFSOther readWrite false 39 0-1-1,0:0:0.0 0-1-1,0:0:0.0
29 "/home" ""
HOST-RESOURCES-TYPES::hrFSOther readWrite false 59 0-1-1,0:0:0.0 0-1-1,0:0:0.0
30 "/boot" ""
HOST-RESOURCES-TYPES::hrFSOther readWrite false 60 0-1-1,0:0:0.0 0-1-1,0:0:0.0
FILE SYSTEM AND DISK INFO,
# snmptable -v 2c -c public 192.168.135.133
HOST-RESOURCES-MIB::hrStorage
Was that a table? HOST-RESOURCES-MIB::hrStorage
# snmpwalk -v 2c
-c public 192.168.135.133 HOST-RESOURCES-MIB::hrStorage |head -10
HOST-RESOURCES-MIB::hrMemorySize.0
= INTEGER: 1079164 KBytes
HOST-RESOURCES-MIB::hrStorageIndex.1
= INTEGER: 1
HOST-RESOURCES-MIB::hrStorageIndex.3
= INTEGER: 3
HOST-RESOURCES-MIB::hrStorageIndex.6
= INTEGER: 6
HOST-RESOURCES-MIB::hrStorageIndex.7
= INTEGER: 7
HOST-RESOURCES-MIB::hrStorageIndex.8
= INTEGER: 8
HOST-RESOURCES-MIB::hrStorageIndex.10
= INTEGER: 10
HOST-RESOURCES-MIB::hrStorageIndex.31
= INTEGER: 31
HOST-RESOURCES-MIB::hrStorageIndex.36
= INTEGER: 36
HOST-RESOURCES-MIB::hrStorageIndex.38
= INTEGER: 38
# snmptable -v
2c -c public 192.168.135.133 HOST-RESOURCES-MIB::hrStorageTable
SNMP table:
HOST-RESOURCES-MIB::hrStorageTable
hrStorageIndex hrStorageType hrStorageDescr hrStorageAllocationUnits
hrStorageSize hrStorageUsed hrStorageAllocationFailures
1
HOST-RESOURCES-TYPES::hrStorageRam Physical memory 1024 Bytes
1079164 958184 ?
3
HOST-RESOURCES-TYPES::hrStorageVirtualMemory Virtual memory 1024 Bytes
3176312 958184 ?
6
HOST-RESOURCES-TYPES::hrStorageOther
Memory buffers 1024 Bytes 1079164
884 ?
7
HOST-RESOURCES-TYPES::hrStorageOther
Cached memory 1024 Bytes 424120
424120 ?
8
HOST-RESOURCES-TYPES::hrStorageOther
Shared memory 1024 Bytes 1020
1020 ?
10
HOST-RESOURCES-TYPES::hrStorageVirtualMemory
Swap space 1024 Bytes 2097148 0
?
31 HOST-RESOURCES-TYPES::hrStorageFixedDisk /
4096 Bytes 3069440 1777321
?
36 HOST-RESOURCES-TYPES::hrStorageFixedDisk
/dev/shm 4096 Bytes 134895 20 ?
38 HOST-RESOURCES-TYPES::hrStorageFixedDisk /run
4096 Bytes 134895 234 ?
39
HOST-RESOURCES-TYPES::hrStorageFixedDisk
/sys/fs/cgroup 4096 Bytes 134895
0 ?
59
HOST-RESOURCES-TYPES::hrStorageFixedDisk
/home 4096 Bytes 259584 8301 ?
60 HOST-RESOURCES-TYPES::hrStorageFixedDisk /boot
4096 Bytes 127147 30323 ?
CPU & MEMORY INFO,
# snmpwalk -v2c localhost -c public
UCD-SNMP-MIB::systemStats
UCD-SNMP-MIB::ssIndex.0 =
INTEGER: 1
UCD-SNMP-MIB::ssErrorName.0
= STRING: systemStats
UCD-SNMP-MIB::ssSwapIn.0 =
INTEGER: 0 kB
UCD-SNMP-MIB::ssSwapOut.0
= INTEGER: 0 kB
UCD-SNMP-MIB::ssIOSent.0 =
INTEGER: 6 blocks/s
UCD-SNMP-MIB::ssIOReceive.0
= INTEGER: 0 blocks/s
UCD-SNMP-MIB::ssSysInterrupts.0
= INTEGER: 55 interrupts/s
UCD-SNMP-MIB::ssSysContext.0
= INTEGER: 90 switches/s
UCD-SNMP-MIB::ssCpuUser.0
= INTEGER: 0
UCD-SNMP-MIB::ssCpuSystem.0
= INTEGER: 0
UCD-SNMP-MIB::ssCpuIdle.0
= INTEGER: 99
UCD-SNMP-MIB::ssCpuRawUser.0
= Counter32: 47221
UCD-SNMP-MIB::ssCpuRawNice.0
= Counter32: 228
UCD-SNMP-MIB::ssCpuRawSystem.0
= Counter32: 31699
UCD-SNMP-MIB::ssCpuRawIdle.0
= Counter32: 26955948
UCD-SNMP-MIB::ssCpuRawWait.0
= Counter32: 10044
UCD-SNMP-MIB::ssCpuRawKernel.0
= Counter32: 0
UCD-SNMP-MIB::ssCpuRawInterrupt.0
= Counter32: 1
UCD-SNMP-MIB::ssIORawSent.0
= Counter32: 890896
UCD-SNMP-MIB::ssIORawReceived.0
= Counter32: 766650
UCD-SNMP-MIB::ssRawInterrupts.0
= Counter32: 6863783
UCD-SNMP-MIB::ssRawContexts.0
= Counter32: 10381886
UCD-SNMP-MIB::ssCpuRawSoftIRQ.0
= Counter32: 3785
UCD-SNMP-MIB::ssRawSwapIn.0
= Counter32: 0
UCD-SNMP-MIB::ssRawSwapOut.0
= Counter32: 0
UCD-SNMP-MIB::ssCpuRawSteal.0
= Counter32: 0
UCD-SNMP-MIB::ssCpuRawGuest.0
= Counter32: 0
UCD-SNMP-MIB::ssCpuRawGuestNice.0
= Counter32: 0
# snmpwalk -v2c localhost -c public
UCD-SNMP-MIB::memory
UCD-SNMP-MIB::memIndex.0 =
INTEGER: 0
UCD-SNMP-MIB::memErrorName.0
= STRING: swap
UCD-SNMP-MIB::memTotalSwap.0
= INTEGER: 2097148 kB
UCD-SNMP-MIB::memAvailSwap.0
= INTEGER: 2097148 kB
UCD-SNMP-MIB::memTotalReal.0
= INTEGER: 1079164 kB
UCD-SNMP-MIB::memAvailReal.0
= INTEGER: 119592 kB
UCD-SNMP-MIB::memTotalFree.0
= INTEGER: 2216740 kB
UCD-SNMP-MIB::memMinimumSwap.0
= INTEGER: 16000 kB
UCD-SNMP-MIB::memShared.0
= INTEGER: 1020 kB
UCD-SNMP-MIB::memBuffer.0
= INTEGER: 884 kB
UCD-SNMP-MIB::memCached.0
= INTEGER: 423816 kB
UCD-SNMP-MIB::memSwapError.0
= INTEGER: noError(0)
UCD-SNMP-MIB::memSwapErrorMsg.0
= STRING:
FINDING LOAD AVERAGES,
# snmptable -v2c localhost -c public
UCD-SNMP-MIB::laTable
SNMP table:
UCD-SNMP-MIB::laTable
laIndex laNames laLoad laConfig laLoadInt
laLoadFloat laErrorFlag laErrMessage
1
Load-1 0.00 12.00 0
0.000000 noError
2
Load-5 0.01 12.00 1
0.010000 noError
3 Load-15 0.05
12.00 5 0.050000
noError
FINDING DISK I/O,
# snmptable -v2c localhost -c public
UCD-DISKIO-MIB::diskIOTable
SNMP table:
UCD-DISKIO-MIB::diskIOTable
diskIOIndex diskIODevice diskIONRead
diskIONWritten diskIOReads diskIOWrites diskIOLA1 diskIOLA5 diskIOLA15
diskIONReadX diskIONWrittenX
1 sda
392479744 458726400 18630 67266 0 0 0
392479744 458726400
2 sda1 4781568 2109440 2082 2055 0 0 0
4781568 2109440
3 sda2
386883072 456616960 16361 65211 0 0 0
386883072 456616960
4 sr0 49152 0 12
0 0 0 0 49152 0
5 dm-0
384059392 453672448 16433 69155 0 0 0
384059392 453672448
6 dm-1 1110016 0 271 0 0 0 0
1110016 0
7 dm-2 1414656 2944512 587 257 0 0 0
1414656 2944512
NETWORK INFO,
# snmptable -v2c localhost -c public
IF-MIB::ifTable
SNMP table: IF-MIB::ifTable
ifIndex ifDescr ifType ifMtu ifSpeed
ifPhysAddress ifAdminStatus ifOperStatus ifLastChange ifInOctets
ifInUcastPkts ifInNUcastPkts ifInDiscards ifInErrors ifInUnknownProtos
ifOutOctets ifOutUcastPkts ifOutNUcastPkts ifOutDiscards ifOutErrors
ifOutQLen ifSpecific
1
lo softwareLoopback 65536
10000000 up up 0:0:00:00.00 1082538 12923 0 0
0 0 1082538 12923 0 0 0 0 SNMPv2-SMI::zeroDotZero
2
eth0 ethernetCsmacd 1500 1000000000 0:c:29:9:e3:b8 up
up 0:0:00:00.00 6660791 87786 0 0 0 0 63286964 50468 0 0 0 0 SNMPv2-SMI::zeroDotZero
3
eth1 ethernetCsmacd 1500 1000000000 0:c:29:9:e3:cc up
up 0:0:00:00.00 3030356 43856 0 0 0 0 3927 25 0 0 0 0 SNMPv2-SMI::zeroDotZero
4
eth2 ethernetCsmacd 1500 1000000000 0:c:29:9:e3:c2 up up 0:0:00:00.00 2927462 43486 0 0 0 0 112282 458 0 0 0 0 SNMPv2-SMI::zeroDotZero
INTERFACES,
# snmpwalk -v2c localhost -c public
IF-MIB::ifDescr
IF-MIB::ifDescr.1 =
STRING: lo
IF-MIB::ifDescr.2 =
STRING: eth0
IF-MIB::ifDescr.3 =
STRING: eth1
IF-MIB::ifDescr.4 =
STRING: eth2
PACKEST IN/OUT FROM PARTICULAR INTERFACES,
# snmpwalk -v2c localhost -c public
IF-MIB::ifOutOctets
IF-MIB::ifOutOctets.1 = Counter32: 1108507
IF-MIB::ifOutOctets.2 = Counter32: 63465468
IF-MIB::ifOutOctets.3 = Counter32: 3927
IF-MIB::ifOutOctets.4 = Counter32: 113330
# snmpwalk -v2c localhost -c public
IF-MIB::ifInOctets
IF-MIB::ifInOctets.1 = Counter32: 1109250
IF-MIB::ifInOctets.2 = Counter32: 6878263
IF-MIB::ifInOctets.3 = Counter32: 3062944
IF-MIB::ifInOctets.4 = Counter32: 2959002
References and Good Read
(Very thanks to all for your great Contribution)
https://www.freebsd.org/cgi/man.cgi?query=snmpd.conf&apropos =0&sektion=0&manpath=FreeBSD+5.2-RELEASE +and+Ports&format=html
Highly descriptive blog, I loved that a lot. Will there be a part 2?
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