Re: ucd-snmp:why not send trap by send_v2trap()

On 12/09/2007, ye_cl <[email protected]> wrote:
> In my snmpd agent, the trap2sink ip address will be changed sometimes,but in
> my embedded uClinux,the filesystem is read-only(romfs), so I can't change
> the trap2sink directive in file "snmpd.conf" which is in filesystem.
> Now,I delete all lines of trap2sink in snmpd.conf, and use the ucd-snmp API
> functions to implement it,but by using API functions, I find the UDP trap
> packages can't be sent out.

The 'send_v2trap' and similar API calls rely on the MIB settings configured
by the 'trap2sink' (and related) directives.   If those MIB entries are not
present, then the agent will not send any traps.

If you can't change the snmpd.conf file, then you could try setting up
equivalent
MIB entries using "snmpset" requests.   I'd start by configuring the agent with
a single "trap2sink" directive, and walk the tables:

     SNMP-NOTIFICATION-MIB::snmpNotifyTable
     SNMP-TARGET-MIB::snmpTargetAddrTable
     SNMP-TARGET-MIB::snmpTargetParamsTable

That will show you the sort of settings that are needed.

Then restart the agent using a configuration *without* the "trap2sink"
directive, and try to recreate the same settings in these three tables
using "snmpset".

Dave

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