Re: »Ø¸´£ºRe: about the snmpagent example

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Keep discussions to the list, where others can both learn
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2008/5/9 <javelin2008@sina.com>:
> Thanks for you reply.
>
>> ----- Original Message -----
>> From: Dave Shield <D.T.Shield@liverpool.ac.uk>
>> To: javelin2008@sina.com
>> Subject: Re: about the snmpagent example
>> Date: 08-05-09 16:38:29
>
>> 2008/5/9 <javelin2008@sina.com>:
>> > Then i've downloaded "example mib module"(nstAgentModuleObject.c)
>> > and "header file"(nstAgentModuleObject.h ) and put them into the
>> > directory:/usr/local/src/net-snmp-5.1.4/agent/mibgroup.
>
>> Is this where you unpacked the source tarball?
>> [Note that this is a very old version, and no longer being maintained.
>> But that shouldn't affect whether you can add a new MIB or not.]
>
> Yes$B!$(Bthe example mib module(nstAgentModuleObject.c) was downlaod from
> "https://sourceforge.net/search/?group_id=12694&type_of_search=mlists",
> the file .c and .h also;
>
>> > Secondly,I entered the commands in the terminal as follows:
>> > # export MIBS=ALL
>> > # ./configure --with-mib-modules="nstAgentModuleObject"
>> > # make
>> > # make install
>
>> This is from /usr/local/src/net-snmp-5.1.4/agent/mibgroup - yes?
>
> Yes,i put the .c and .h file in
> /usr/local/src/net-snmp-5.4.1/agent/mibgroup.I use net-snmp's version is
> 5-4-1.


OK - 5.4.1 is a much more sensible version to use.
That's the most recent release - 5.1.4 is obsolete.
[Please be careful when posting queries - such details can be important!]


>> Did you start the new agent?
>> How?
>
>> Is there a vendor-supplied version of the Net-SNMP agent already
>> installed?
>> Did you stop that first? (Or better, remove it completely before
>> starting with
>> the self-compiled version).
>
> First,i stop the snmpd,then recompiled the source.
>
> # ./configure --with-mib-modules="nstAgentModuleObject"
> # make
> # make install
> I use the default installation.
> Thanks very much,Dave Shield.


But *how* did you stop the (vendors supplied) agent?
What was the command you used?

How did you start the re-compiled agent?
What was the command you used?

What is the result of
ps -ef | grep snmpd
?



> I also generate a small program use mib2c,the code below:


> void
> init_sysid(void)
> {
> static oid sysid_oid[] = { 1, 3, 6, 1, 4, 1, 55555, 1, 1, 1, 1 };

> netsnmp_register_scalar(netsnmp_create_handler_reg istration
> ("sysid", handle_sysid, sysid_oid,
> OID_LENGTH(sysid_oid), HANDLER_CAN_RONLY)))

> }

OK ....


> I also put these two files copy to .../net-snmp-5.4.1/agent/mibgroup/,then
> run
> # export MIBS=ALL
> # snmptranslate -IR -On sysid
> .1.3.6.1.4.1.55555.1.1.1.1
> # ./configure --with-mib-modules="sysid"
> # make
> # make install

OK....

>
> #snmpd -f -Le -d -Ddump -Dsysid
> but when i asked for a snmpget command,it also gave me the result:
> # snmpget -v 2c -c readstring localhost .1.3.6.1.4.1.55555.1.1.1.1
> SNMPv2-SMI::enterprises.55555.1.1.1.1=No Such Object available on this agent
> at this OID

You've forgotten the instance subidentifier.
..1.3.6.1.4.1.55555.1.1.1.1 is the OID of the MIB *object*,
not the scalar instance.

Try
snmpget -v 2c -c readstring localhost .1.3.6.1.4.1.55555.1.1.1.1.0


Dave

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