SNMP Mib check results in "cannot parse OID" but testing works

[KBlasz]

Been struggling with this for a few hours, and so far I have

• Downloaded all the necessary MIBS for the cisco firewall I am using to the Ubuntu Proxy (/usr/share/snmp/mibs/)
• Installed snmpwalk on the proxy
• setup a host with snmp port and address

Running snmpwalk on the proxy server gives what seems to be the correct value as seen here:


Testing the check gives a successful response:


The MIB item for example vendor name


But when I execute the check if failes with:
snmp_parse_oid(): cannot parse OID "ENTITY-MIB::entPhysicalMfgName.1".


Any help is much appreciated.

[KBlasz]

In case anyone else gets this issue, it seems to be something to do with the mib config file, its rather strange for me since it worked when running the test or snmp walk but rerunning the commands and ensuring the config file contained the paths fixed the issue.

Extract of my commands in case its handy and I am too lazy to generalize:

download the program and check for mibs

sudo apt install snmp-mibs-downloader
sudo download-mibs

edit config, e.g this is what i did to organize my cisco mibs:

sudo nano /etc/snmp/snmp.conf

#add the lines and comment everything else
mibdirs -/usr/share/snmp/mibs/cisco
mibdirs -/usr/share/snmp/mibs/ciscov2

copy mib files to dir (e.g in my case i was copying from a windows host to ubuntu)

scp C:\AdminScripts\cisco-mibs\Zabbix-CISCO-ASA-MIBs.zip administrator@<IP Address>:/home/administrator/

move them around to the correct folders:

apt install unzip
unzip /home/administrator/Zabbix-CISCO-ASA-MIBs.zip -d /usr/share/snmp/mibs/cisco
sudo mv /usr/share/snmp/mibs/cisco/Zabbix-CISCO-ASA-MIBs/* /usr/share/snmp/mibs/cisco
mkdir /usr/share/snmp/mibs/ciscov2
sudo tar -xzf /usr/share/snmp/mibs/cisco/v2.tar.gz -C /usr/share/snmp/mibs/ciscov2
sudo mv /usr/share/snmp/mibs/ciscov2/auto/mibs/v2/* /usr/share/snmp/mibs/ciscov2

finally restart the proxy service

sudo systemctl restart zabbix-proxy

[mrnobody]

Hi
When you see something like "ENTITY-MIB::entPhysical" it's already translated, to be human readable.
Change SNMP OID entry with 1.3.6.1.2.1.47.1.1.1.1.12.1
This is the same OID without translation... Low level information, easier for machines, harder for us humans.

[KBlasz]

In case anyone else gets this issue, it seems to be something to do with the mib config file, its rather strange for me since it worked when running the test or snmp walk but rerunning the commands and ensuring the config file contained the paths fixed the issue.

Extract of my commands in case its handy and I am too lazy to generalize:

download the program and check for mibs

sudo apt install snmp-mibs-downloader
sudo download-mibs

edit config, e.g this is what i did to organize my cisco mibs:

sudo nano /etc/snmp/snmp.conf

#add the lines and comment everything else
mibdirs -/usr/share/snmp/mibs/cisco
mibdirs -/usr/share/snmp/mibs/ciscov2

copy mib files to dir (e.g in my case i was copying from a windows host to ubuntu)

scp C:\AdminScripts\cisco-mibs\Zabbix-CISCO-ASA-MIBs.zip administrator@<IP Address>:/home/administrator/

move them around to the correct folders:

apt install unzip
unzip /home/administrator/Zabbix-CISCO-ASA-MIBs.zip -d /usr/share/snmp/mibs/cisco
sudo mv /usr/share/snmp/mibs/cisco/Zabbix-CISCO-ASA-MIBs/* /usr/share/snmp/mibs/cisco
mkdir /usr/share/snmp/mibs/ciscov2
sudo tar -xzf /usr/share/snmp/mibs/cisco/v2.tar.gz -C /usr/share/snmp/mibs/ciscov2
sudo mv /usr/share/snmp/mibs/ciscov2/auto/mibs/v2/* /usr/share/snmp/mibs/ciscov2

finally restart the proxy service

sudo systemctl restart zabbix-proxy