trapsess problems

Hi 

I am currently working on implementing trap destinations using trapsess and I am running in some problems

Setup: I have 5 hosts
3 are one is using net-snmp-5.4.2.1(linux system)
1 is using net-snmp-5.4.1(linux system)
the other net-snmp-5.5(windows system)

What I want to do is to monitor traps simple by tcpdump on the linux hosts, what should work without any problems.

I added in the snmpd.conf file on the windows host the following lines

trapsess -v 3 -e 0x8000000001020304 -u snmpv3_SHA_authNoPriv_trap_dst6 -l authNoPriv -a SHA -A helloworld 10.16.10.60:162
(and similar ones for the other hosts)

However after restarting the agent(which should itself generate a trap), the snmpd.log says:

snmpd: send_trap: USM unknown security name (no such user exists) and therefore no traps are beeing sent
=>Why do i get an error like this?

I picked an example engineID which should be correct; i think the other parameters should be allright too, so as far as i see the configuration should be fine

Sending traps works, cause if i define trapsess like this:

trapsess -v 3 -u snmpv3_SHA_authNoPriv_trap_dst6 -l authNoPriv -a SHA -A helloworld 10.16.10.60:162
so without engineID the traps can be monitored by tcpdump without any problems!

I thought about if creating a user in the same config file would help, but cleary that does not make sense since the other trapsess definition works fine without any problems.

The same happens if I define trapsess on almost every other of the linux hosts, except one.

Interestengly enough the exact line like above

trapsess -v 3 -e 0x8000000001020304 -u snmpv3_SHA_authNoPriv_trap_dst3 -l authNoPriv -a SHA -A helloworld 10.16.10.60:162 

works on the host with 5.4.1, cause the log file gives

Aug 24 12:18:36 ssg3ux snmpd[14999]: Received TERM or STOP signal...  shutting down...
Aug 24 12:18:39 ssg3ux snmpd[15013]: NET-SNMP version 5.4.1

Adding the same line and config for another host however again leads to a problem...

trapsess -v 3 -e 0x8000000001020304 -u snmpv3_SHA_authNoPriv_trap_dst5 -l authNoPriv -a SHA -A helloworld 10.16.10.70:162

the log says:

Aug 24 12:21:38 ssg3ux snmpd[15036]: Received TERM or STOP signal...  shutting down...
Aug 24 12:21:38 ssg3ux snmpd[15036]: snmpd: send_trap: USM unknown security name (no such user exists)
Aug 24 12:21:40 ssg3ux snmpd[15044]: snmpd: send_trap: USM unknown security name (no such user exists)
Aug 24 12:21:40 ssg3ux snmpd[15044]: NET-SNMP version 5.4.1

which are error msgs generated when sending traps on stop&start.

I am really out of ideas why it behaves like that.
Can somebody give me a hint, what's the problem here?

I'd really appreciate it!

Greeting
Markus

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