Missing Virtual Interfaces On Linux With net-snmp

I'm currently testing the NPM application in an environment with both linux and windows nodes but just realized that NPM is unable to find virtual interfaces created on linux hosts. net-snmp is installed and an snmpwalk does show the virtual interfaces ip addresses yet when I try to manually add a device, only the primary interfaces (i.e eth0, eth1 and lo) show up in the list of resources to monitor! Am I missing something here? Any help or insight will be greatly appreciated.

P.S: Im using Orion NPM v10 on a Windows Server 2008 R2.

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JaroslawLadyga

I got similar problem with snmp-linux devices before (Debian Linux on Kuro Box). It was a case of snmp config files for device.

I found what necessary SNMP configuration changes are to do on Kuro config files:

in snmpd.conf file:first step# sec.name source communitycom2sec readonly default <your Orion snmp com. string>#com2sec readonly default public#com2sec readwrite default private

#com2sec paranoid default publiccom2sec local 127.0.0.1 <your Orion snmp com. string>com2sec localNet <IP mask for local net, ex:10.5.0.0> /24 <your Orion snmp com. string>#com2sec readwrite default private

Second Step

##### Second, map the security names into group names:# sec.model sec.namegroup MyROSystem v1 paranoidgroup MyROSystem v2c paranoidgroup MyROSystem usm paranoidgroup MyROGroup v1 readonlygroup MyROGroup v2c readonlygroup MyROGroup usm readonlygroup MyRWGroup v1 readwritegroup MyRWGroup v2c readwritegroup MyRWGroup usm readwritetogroup MyROSystem v1 localgroup MyROSystem v2c localgroup MyROSystem usm localgroup MyROGroup v1 localnetgroup MyROGroup v2c localnetgroup MyROGroup usm localnetgroup MyRWGroup v1 localgroup MyRWGroup v2c localgroup MyRWGroup usm localThird Step##### Third, create a view for us to let the groups have rights to:# incl/excl subtree maskview all included .1 80view system included .iso.org.dod.internet.mgmt.mib-2.systemDon't chnage anything here leave this one as default settingFinal Step##### Finally, grant the 2 groups access to the 1 view with different# write permissions:# context sec.model sec.level match read write notifaccess MyROSystem "" any noauth exact system none noneaccess MyROGroup "" any noauth exact all none noneaccess MyRWGroup "" any noauth exact all all noneDon't change anything here leave this one as default setting. Then change in snmp.conf as below:com2sec paranoid default public#com2sec readonly default public#com2sec readwrite default privateto:#com2sec paranoid default publiccom2sec readonly 127.0.0.1 <your Orion snmp com. string>#com2sec readwrite default privateAbove are explained at www.debianhelp.co.uk/snmp.htm Please have a look - maybe it can help you.

boobsymalone

Hi Jaroslaw,

I tested your configuration but still no luck: adding the linux node still doesnt show the virtual interfaces. I honestly doubt that the issue was really the snmp configuration in the first place but rather with solarwinds. As I previously mentioned, an snmpwalk does show all the virtual interfaces and I even used the solarwinds mib walk tool and confirmed that they are indeed showing! Any other insight? Thanks in advance.