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Check SNMP Cisco Traffic
Owner
Hits
164081
Files:
| File | Description |
|---|---|
| check_snmp_cisco_traffic | the plugin itself |
| check-traffic.php | pnp template |
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Check Traffic Usage of an Interface on a Cisco Device
This is a bit tricky, because cisco's snmp counter are independent from the cli output.
The snmp counters can't be reset at runtime, they online reset themself at reboot.
So in addition to the snmp values we get, we need to calculate....
We save the last check results/sums in a text file so make sure you set "tmpfile" below.
Please create it, fill in 4 zeros and make sure it is writable by the user that nagios runs as
$ touch /home/nagios/check_snmp_cisco_traffic.txt
$ echo 0 0 0 0> /home/nagios/check_snmp_cisco_traffic.txt
$ chown nagios:nagios /home/nagios/check_snmp_cisco_traffic.txt
This plugin currently only uses HC/64bit counter, because 32bit begin from zero too often.
You also have to find out the interface number yourself, i don't, yet, want the script to
search for it every runtime. Just snmpwalk your device like this:
$ snmpwalk -v2c -c community-string HOST 1.3.6.1.2.1.31.1.1.1.1
IF-MIB::ifName.1 = STRING: Fa0
This -^- is the interface-number
Version 0.1, Copyright (c) 2008 by Michael Boehm
TODO:
-definitively add multiple check support with prefix+name_of_txt_file (should be easy)
--> easier than i thought, see Update-2008-09-22 below
-testing
-maybe accepting Interface descriptions as argument
-maybe include check for 32bit counter
---------------------------------
There was surely not enough testing(-time), so please report any bugs!
I'm not quiet happy with the pnp template, if anybody got suggestions please post or send them to me. Thx
Update-2008-09-22: modified pnp template - added "--lower=$MIN[1]" for better in-out ratio
Update-2008-09-22: remark added to temp-file section:
# if you use suffix: $1 this will be the IP adress of the given device
# so different txt files for different devices are possible
tmpfile=/home/nagios/check_snmp_cisco_traffic_$1.txt
This is a bit tricky, because cisco's snmp counter are independent from the cli output.
The snmp counters can't be reset at runtime, they online reset themself at reboot.
So in addition to the snmp values we get, we need to calculate....
We save the last check results/sums in a text file so make sure you set "tmpfile" below.
Please create it, fill in 4 zeros and make sure it is writable by the user that nagios runs as
$ touch /home/nagios/check_snmp_cisco_traffic.txt
$ echo 0 0 0 0> /home/nagios/check_snmp_cisco_traffic.txt
$ chown nagios:nagios /home/nagios/check_snmp_cisco_traffic.txt
This plugin currently only uses HC/64bit counter, because 32bit begin from zero too often.
You also have to find out the interface number yourself, i don't, yet, want the script to
search for it every runtime. Just snmpwalk your device like this:
$ snmpwalk -v2c -c community-string HOST 1.3.6.1.2.1.31.1.1.1.1
IF-MIB::ifName.1 = STRING: Fa0
This -^- is the interface-number
Version 0.1, Copyright (c) 2008 by Michael Boehm
TODO:
-definitively add multiple check support with prefix+name_of_txt_file (should be easy)
--> easier than i thought, see Update-2008-09-22 below
-testing
-maybe accepting Interface descriptions as argument
-maybe include check for 32bit counter
---------------------------------
There was surely not enough testing(-time), so please report any bugs!
I'm not quiet happy with the pnp template, if anybody got suggestions please post or send them to me. Thx
Update-2008-09-22: modified pnp template - added "--lower=$MIN[1]" for better in-out ratio
Update-2008-09-22: remark added to temp-file section:
# if you use suffix: $1 this will be the IP adress of the given device
# so different txt files for different devices are possible
tmpfile=/home/nagios/check_snmp_cisco_traffic_$1.txt
Reviews (2)
Very good!
I have made a little change in order to use interface name instead of index number. My changes:
index=`snmpwalk -v2c -c $snmpstring $host IF-MIB::ifName | awk -v PORTNAME="$interface\$" '$0 ~ PORTNAME {split($1,array,"."); print array[2]}'`
# current value
trafbyteIn=`snmpget -v2c -c $snmpstring $host 1.3.6.1.2.1.31.1.1.1.6.$index |awk {'print $4'}`
trafbyteOut=`snmpget -v2c -c $snmpstring $host 1.3.6.1.2.1.31.1.1.1.10.$index |awk {'print $4'}`
I have made a little change in order to use interface name instead of index number. My changes:
index=`snmpwalk -v2c -c $snmpstring $host IF-MIB::ifName | awk -v PORTNAME="$interface\$" '$0 ~ PORTNAME {split($1,array,"."); print array[2]}'`
# current value
trafbyteIn=`snmpget -v2c -c $snmpstring $host 1.3.6.1.2.1.31.1.1.1.6.$index |awk {'print $4'}`
trafbyteOut=`snmpget -v2c -c $snmpstring $host 1.3.6.1.2.1.31.1.1.1.10.$index |awk {'print $4'}`
byembeegee, January 10, 2013
Provides a cumulative total of thru put on any port.
With a little change in math it would work.
With a little change in math it would work.
