From Net-SNMP Wiki

How do I remove a MIB from the agent?

Deleting the text file for a MIB does not affect the agent (other than to prevent it from recognising MIB object names in the config files). It's necessary to tell the agent not to activate the relevant code that actually implements these objects. There are three ways to do this:

There are three options to prevent the agent returning information from a particular MIB:

• re-run configure to exclude the given MIB module(s) from the build configuration, then recompile and reinstall:

       ./configure --with-out-mib-module=host   ....
       make
       make install

• use access control to exclude the mib from the view used to query the agent:

       com2sec public  default public
       

       group   public  v1      public
       group   public  v2c     public
       

       view    ourmib  included  system
       view    ourmib  included  printmib
       view    ourmib  excluded  host
       view    ourmib  included  privatemib
       

       access  public  "" any noauth exact ourmib none none

With v5.3 and above, this can also be done by supplying the relevant view name to the "rocommunity" or similar directive:

        rocommunity public default -V ourmib

• disable the MIB at runtime

         snmpd -I -hr_system,hr_storage,hr_device,hr_other,....

Note that this relies on knowing which modules are used to implement the relevant MIB objects. If you're not sure, you can check which MIB modules are loaded by getting the agent to report them as they are initialised:

         snmpd -Dmib_init -H

Hopefully it should then be fairly obvious which ones to turn off.

   FAQ:Agent
   

1. What MIBs are supported?
2. What protocols are supported?
3. How do I configure the agent?
4. How do I remove a MIB from the agent?
5. I've installed a new MIB file. Why can't I query it?
6. How do I add a MIB to the agent?
7. What's the difference between 'exec', 'sh' and 'pass'?
8. What's the difference between AgentX, SMUX and proxied SNMP?
9. What about 'dlmod' - what's that about?
10. Which should I use?
11. Can I use AgentX when running under Windows?
12. Can I use AgentX (or an embedded SNMP agent) in a threaded application?
13. How can I run AgentX with a different socket address?
14. How can I turn off SMUX support?
15. How can I combine two copies of the 'mib2' tree from separate subagents?
16. What traps are sent by the agent?
17. Where are these traps sent to?
18. How can I send a particular trap to selected destinations?
19. When I run the agent it runs and then quits without staying around. Why?
20. After a while the agent stops responding, and starts eating CPU time. Why?
21. How can I stop other people getting at my agent?
22. How can I listen on just one particular interface?
23. How do I configure access control?
24. I don't understand the new access control stuff - what does it mean?
25. How do I configure SNMPv3 users?
26. The 'createUser' line disappears when I start the agent. Why?
27. What's the difference between /var/net-snmp and /usr/local/share/snmp?
28. My new agent is ignoring the old snmpd.conf file. Why?
29. Why am I getting "Connection refused"?
30. Why can't I see values in the UCDavis 'extensible' or 'disk' trees?
31. Why can't I see values in the UCDavis 'memory' or 'vmstat' tree?
32. What do the CPU statistics mean - is this the load average?
33. How do I get percentage CPU utilization using ssCpuRawIdle?
34. What about multi-processor systems?
35. The speed/type of my network interfaces is wrong - how can I fix it?
36. The interface statistics for my subinterfaces are all zero - why?
37. Does the agent support the RMON-MIB?
38. What does "klread: bad address" mean?
39. What does "nlist err: wombat not found" (or similar) mean?
40. How about "Can't open /dev/kmem"?
41. The agent is complaining about 'snmpd.conf'. Where is this?
42. The system uptime (sysUpTime) returned is wrong!
43. Can the agent run multi-threaded?