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For devices with proprietary MIB's or Enterprise MIBS, you should obtain them from the vendor, Google is very helpful and add them to your MIB's in ~/mibs, before doing the SNMP walk.Commands to run:
For a large collection of MIB files which have been error corrected, you can find many MIBS on Keith Sinclair's GitHub MIB Repo
Organise your MIBS.
If you do not have any vendor MIBS, download the MIBS from the GitHub Repo
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cd ~
wget https://github.com/kcsinclair/mibs/archive/master.zip
unzip master.zip
mv mibs-master mibs |
If you have MIBS from your vendor
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mkdir ~/mibs
cp <vendor mib file(s)> ~/mibs
cp /usr/local/nmis8/mibs/traps/* ~/mibs
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Test your SNMP WALK and MIBS
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snmpwalk -m ALL -M ~/mibs -v 2c -c GOODCOMMUNITY <HOSTNAME or IP ADDRESS> system |
Does SNMP Bulk Walk work?
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snmpbulkwalk -m ALL -M ~/mibs -v 2c -c GOODCOMMUNITY <HOSTNAME or IP ADDRESS> system |
Expected output:
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SNMPv2-MIB::sysDescr.0 = STRING: Hardware: Intel64 Family 6 Model 15 Stepping 6 AT/AT COMPATIBLE - Software: Windows Version 6.1 (Build 7601 Multiprocessor Free)SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.311.1.1.3.1.1 DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (40604629) 4 days, 16:47:26.29 SNMPv2-MIB::sysContact.0 = STRING: dc_admin@opmantek.com SNMPv2-MIB::sysName.0 = STRING: kaos SNMPv2-MIB::sysLocation.0 = STRING: Head Office SNMPv2-MIB::sysServices.0 = INTEGER: 79 |
Run a full walk and redirect to a file, note that you can use snmpbulkwalk on many devices when using SNMPv2C, this greatly improves the speed of collection on very large devices.
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snmpwalk -m ALL -M ~/mibs -v 2c -c GOODCOMMUNITY <HOSTNAME or IP ADDRESS> .1 > ~/VENDOR-Product.mib
or
snmpbulkwalk -m ALL -M ~/mibs -v 2c -c GOODCOMMUNITY <HOSTNAME or IP ADDRESS> .1 > ~/VENDOR-Product.mib |
Now you have an SNMP Dump.
SNMP WALK with Numerical OIDS
If you are seeking support for device modelling, getting the SNMP walk results as numerical OID's only is very useful, as this can be used in an SNMP simulator. There is a translate tool available to map the OIDs we well, https://github.com/kcsinclair/mibs/blob/master/translate_snmpwalk.pl
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snmpwalk -v2c -c COMMUNITY String -ObentU IPADDRESS_OR_NODENAME 1.3.6 > myagent.snmpwalk |
Goal for Modelling
What is the goal for the modelling? Just standard type support, or more advanced collection, do you want to collect some performance data about how a protocol is operating, or verify the number of sessions a firewall is running.
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This page has great information about Modelling MIBS that use Indexes using the systemHealth section.