snmptrapd ignoring/dropping traps (performance issues?)

Ricardo Oliveira <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <[email protected]>
Hi,

 

I'm using snmptrapd v5.1.2 on CentOS 5.2, and I'm having some issues with traps being ignored or dropped.

I have several devices logging to the server, so I'm concerned this could be a performance issue of snmptrapd.

Otherwise, it could very well be some kind of configuration issue on my part, and that's why I'm asking for your help.

My startup options are:

 

-Ls6 -p /var/run/snmptrapd.pid

 

My snmptrapd.conf has the following:

 

--- start ---

disableAuthorization yes

traphandle SNMPv2-SMI::enterprises.9.9.41.2.0.1 /usr/local/bin/TrapHandler

--- end ---

 

The TrapHandler is a C++ executable I made which basically receives a trap, forks and dumps the trap to a file, to try and return to the snmptrapd as fast as possible (before, I had a perl script, but it was way too slow).

 

The symptoms I have are: 

 

- The trap is generated on the device

- The trap is received at the interface (seen by tcpdump)

- The traps never shows on any log file.

 

I tried:

 

- Adding -d to the options: successfully logs the number of bytes received from each host. The lost traps do NOT show on this log.

- Adding -D ALL to the options: snmptrapd inexplicably crashes/dies after a few seconds and logs nothing.

- Running snmptrapd logging to stdout in a shell: again, the traps never show on the log

 

I'm not sure how many traps per second this should be able to handle, but right now I consider I'm way bellow the number I will need to handle (I'm only receiving from less than 10 devices, although some generate a large amount of traps) and I'm concerned this daemon will not be enough for my requirements.

 

Can anyone give me any help/tips with this one?

 

Thanks in advance,

Ricardo Oliveira.

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