SNMP Config / Testing help

[Wayne]

Hi guys,
We are trying to setup Zabbix to monitor one of our main switches. I have enabled SNMP, created the user/community/auth passphrase/priv passphrase on the switch.

Zabbix is not graphing data. So I figured the next logical step is to check that output on the switch is correct.

I have tried the following command on the zabbix server:
snmpwalk -v 3 -c mycommunityname <IP address of switch>

but I receive the following error:
snmpwalk: Failure in sendto (Operation not permitted)


I have googled the error, but everything I came up with wasn't in English
Does anyone have experience setting up SNMP monitoring that could help me out just a bit?

Any help is appreciated!

[johanpre44]

Using snmpwalk utility to test SNMP

I'm using SNMP, but only versions 1 and 2c. When I test SNMP I use the following command:
snmpwalk -Os -v 1 -c <community_string> <host> [section]

<community_string> = your community string, this is usually public
<host> = your host name or ip
[section] = This is optional and i usually use "system" or "interfaces",
basically this just cuts down on the ammount of info returned
-v 1 = the version, can be changed to "-v 2c", but with "-v 3" you need a username/password or something (think it with this you need the -A, -a, -u, -x, -X switches - see "man snmpcmd" for more help - I don't have any v3 SNMP to test this with)

If I want to get and output that I can use in zabbix I will use
snmpwalk -Of -v 1 -c <community_string> <host> [section] | cut -d "." -f 8-50

the output:

interfaces.ifNumber.0 = INTEGER: 9
interfaces.ifTable.ifEntry.ifIndex.1 = INTEGER: 1
interfaces.ifTable.ifEntry.ifIndex.2 = INTEGER: 2

The part before the "=" can then be used straight in zabbix

Also check your zabbix_server log file, I forgot to compile with SNMP support and only noticed when I had a look at the log file...

I prefer to stick to SNMP v1 because most of the Cisco routers and 3com switches on my network supports it. I also cannot see the difference between v1 and 2c when I do and snmpwalk, the informations returned is the same for both.

[Wayne]

Awesome. Thank you for the info, I will be doing some testing on that today and see what we can come up with.

Thanks!