No more variables left in this MIB View

[Eric Maynard]

Eric Maynard [http://community.zenoss.org/people/emaynard] created the discussion

"No more variables left in this MIB View"

To view the discussion, visit: http://community.zenoss.org/message/72579#72579

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Hello,


Is it Zenoss or snmpwalk that should be able to recognize the end of the MIB tree segment in this case?

snmpwalk output:
----------------------
[***@nmssvr zenoss]$ snmpwalk -v2c -mycomm  172.16.xx.xx 1.3.6.1.4.1.17373.4.1.4.1.5
SNMPv2-SMI::enterprises.17373.4.1.4.1.5.1 = *INTEGER: 923*
SNMPv2-SMI::enterprises.17373.4.1.4.1.5.1 = No more variables left in this MIB View (It is past the end of the MIB tree)

[***@nmssvr zenoss]$ snmpwalk -v2c -mycomm172.16.xx.xx 1.3.6.1.4.1.17373.4.1.4.1.5.1
SNMPv2-SMI::enterprises.17373.4.1.4.1.5.1 = No more variables left in this MIB View (It is past the end of the MIB tree)


Test Data Source output of Monitoring Template Data Source:
-------------------------------------------------------------------------------
Preparing Command...
Executing command snmpwalk -cmycomm -v2c 172.16.xx.xx 1.3.6.1.4.1.17373.4.1.4.1.5 against 172.16.xx.xx
SNMPv2-SMI::enterprises.17373.4.1.4.1.5.1 = *INTEGER: 923* SNMPv2-SMI::enterprises.17373.4.1.4.1.5.1 = No more variables left in this MIB View (It is past the end of the MIB tree)
DONE in 0 seconds


Preparing Command...
Executing command snmpwalk -cmycomm -v2c 172.16.xx.xx 1.3.6.1.4.1.17373.4.1.4.1.5.1 against 172.16.xx.xx
SNMPv2-SMI::enterprises.17373.4.1.4.1.5.1 = No more variables left in this MIB View (It is past the end of the MIB tree) DONE in 0 seconds


Other parts of this MIB seem to be processed just fine, but I just can't seem to get this one variable without also pulling in the no more vaiables left as well.  Either in addition to the actual value - highlighted examples - or just the message by itself when using the ....5.1 node by itself.

Anyone run into similar problems or know where to nudge me towards resolving this?

thanks,
Eric
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[nilie]

nilie [http://community.zenoss.org/people/nilie] created the discussion

"Re: No more variables left in this MIB View"

To view the discussion, visit: http://community.zenoss.org/message/72580#72580

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Basically snmpwalk is using a series of SNMP GETNEXT requests to query the network entity for a tree of information and in some situations there is no next OID to be returned. You can read more about this here :   http://www.net-snmp.org/wiki/index.php/TUT:snmpgetnext http://www.net-snmp.org/wiki/index.php/TUT:snmpgetnext
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[Eric Maynard]

Eric Maynard [http://community.zenoss.org/people/emaynard] created the discussion

"Re: No more variables left in this MIB View"

To view the discussion, visit: http://community.zenoss.org/message/72642#72642

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Thanks Nilie. 

I actually did consult that page and it all makes sense, but I guess I'm confused about how Zenoss is actually performing the lookup.

I do see now in the Zenoss zenperfsnmp.log where each entry references SNMP "get" not "walk" so I guess the Test button for data sources really doesn't mean much in this case.  They are actually free of any errors for this particular host.

In fact, running snmpget does indeed grab the exact value that I attempting to graph.

snmpget -cmycomm -v2c 172.16.xx.xx 1.3.6.1.4.1.17373.4.1.4.1.5.1
SNMPv2-SMI::enterprises.17373.4.1.4.1.5.1 = INTEGER: 918

So do I have a problem with Zenoss's implementation of RRD?  Other variables appear to graph without any issue.

-Eric
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