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I have to manage an Ethernet traffic card (my Linux target board(mips32)) having net-snmp 5.5 installed on it.

I want to upgrade it to latest net-snmp 5.7.3 and have successfully compiled net-snmp.

After that I had changed the all the libnetsnmp* library files, MIB text files and snmpd and snmptrapd daemons...but it gives errors like failed to open shared library ....can not find libnesnmp.so.20 files Why it is throwing this error even though I have updated net-snmp library files.

I am confused that what files of 5.5 has to be replaced by the 5.7.3, in order to upgrade my net-snmp package.

Also please guide me the steps to install a Fresh net-snmp package on any Linux board.

k1eran
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tapeesh
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1 Answers1

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The net-snmp suite comes in 3 distinct Linux packages.

  • net-snmp (the snmpd agent and snmptrapd daemons, documentation, etc)
  • net-snmp-utils (various utilities e.g. for interrogating SNMP agents, sending traps, etc )
  • net-snmp-libs (runtime libraries)

Have a look at https://stackoverflow.com/a/32093525/449347 to a more detailed listing of files in each.

Make sure you have updated ALL that you have installed.

EDIT ...

Paraphrasing http://www.betweendots.com/topic/45-install-the-latest-version-of-net-snmp/

When you have a CentOS box and type "yum install net-snmp", you'll get version 5.5. If for some reason you want the latest version (5.7 at the time of writing), then here's what you have to do:

  1. yum remove net-snmp net-snmp-utils

  2. Install dependencies: yum install perl-ExtUtils-CBuilder perl-ExtUtils-MakeMaker

  3. Unpack and install net-snmp:

    tar zvxf net-snmp-*.tar.gz
cd net-snmp-*
./configure
make
make install
  4. Create an snmpd.conf and put it in /usr/local/share/snmp.

But follow above link for more info!

Community
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k1eran
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  • Thanks man... I am concerned with NET-SNMP only but my doubt persists that.... why it throws error like "failed to open shared library ....can not find libnesnmp.so.20 files".... why it is throwing this error even though i have updated netsnmp library files. Two points i want to discuss here 1. Is there any other file/files apart from mentioned above in my question that has to be changed? 2. what are the steps to install a new Fresh NET-SNMP package on a target board. – tapeesh Dec 16 '15 at 12:21
  • I had overcome the error in opening the shared library by creating sym link of all the net-snmp *.s0.30.0.3 file in /usr/lib by following way:-- ln -s /lib/libnesnmp.so.30.0.3 /usr/lib/libnesnmp.so.20 But now i am getting Following Error netsnmp_get_table_handler(NULL) called netsnmp_inject_handler() called illegally NET-SNMP version 5.7.3 AgentX subagent connected example-demon is up and running. So why my NET-SNMP version 5.7.3 AgentX subagent connected??? – tapeesh Dec 18 '15 at 10:12
  • Also I am able to send snmptraps on command line but not the snmpget/snmpset commands.... Can anyone figure out this problem? – tapeesh Dec 18 '15 at 10:15