[SNMP4J] Trap Messages using SampleAgent from the network not working

[Ver Allan N. Sumabat]

This is the part I'm not sure I understand. Correct me if I'm wrong, my
understanding is let's say PC 1 (agent) generates a trap. The trap is caused
by let's say a hardware malfunction. Shouldn't the trap message originate
from PC 1 and not PC 2 because PC 1 has the failing hardware and the agent
should simply report it to PC 2? That is, PC 2 is the trap receiver
listening on port 162?


-----Original Message-----
From: Kazantsev, Andrey V. [mailto:kazantsev at axmor.com] 
Sent: Friday, July 23, 2010 6:52 PM
To: Ver Allan N. Sumabat
Cc: snmp4j at agentpp.org
Subject: RE: [SNMP4J] Trap Messages using SampleAgent from the network not
working

Are you sure that snmp agent listens on address that is accessible for snmp
monitor? I.e., PC 1 (agent) address is 192.168.1.1 and PC 2 (monitor)
address is 192.168.1.2. Snmp agent should listen on 192.168.1.1:161, while
snmp monitor should send notifications to 192.168.1.1:161 (using its
192.168.1.2 interface).

If this is ok - check network connection between these two PCs, maybe there
is a firewall on PC 1 that is blocking 161 port?

If you work on linux, you can also use tcpdump to see what is going on
network.

-----Original Message-----
From: Ver Allan N. Sumabat [mailto:allan.sumabat at aatitechnologies.com] 
Sent: Friday, July 23, 2010 17:44
To: Kazantsev, Andrey V.
Cc: snmp4j at agentpp.org
Subject: RE: [SNMP4J] Trap Messages using SampleAgent from the network not
working

The thing is the traps and informs are received locally meaning on
127.0.0.1. When I use another machine to receive the traps, I cannot receive
them. Let me elaborate further:

Case 1:

PC 1 - has snmp agent (SampleAgent from snmp4j source), has snmp monitor
-----------------------
result: traps are received by PC 1.


Case 2:

PC 1 - has snmp agent (snmp4j agent)
PC 2 - has snmp monitor
-----------------------
Result: no traps received by PC 2


Btw, I didn't change anything in the SampleAgent source to make it run.


-----Original Message-----
From: Kazantsev, Andrey V. [mailto:kazantsev at axmor.com] 
Sent: Friday, July 23, 2010 5:30 PM
To: Ver Allan N. Sumabat
Cc: snmp4j at agentpp.org
Subject: RE: [SNMP4J] Trap Messages using SampleAgent from the network not
working

Hi,

By default traps and informs use port 162, maybe be this is the cause of
problem?

-----Original Message-----
From: snmp4j-bounces at agentpp.org [mailto:snmp4j-bounces at agentpp.org] On
Behalf Of Ver Allan N. Sumabat
Sent: Friday, July 23, 2010 16:09
To: snmp4j at agentpp.org
Subject: [SNMP4J] Trap Messages using SampleAgent from the network not
working

Hi List,

 

I'm having a problem trying to get trap messages over the network using the
SampleAgent class. I tried starting it with the following argument:
udp:127.0.0.1/161

 

Using the iReasoning MIBBrowser personal edition, I can receive trap
messages locally. When I use another pc as snmp monitor, I could no longer
receive those trap messages.

 

I tried changing the program argument to udp:192.168.x.x/161 which is the ip
address of the pc running the agent but still same result.

 

Any ideas?

 

Thanks,

Allan

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