Re: Help wanted Regarding SNMPTRAP (URGENT)

The ICMP response usually indicates that nothing is
listening to the port (in this case 162). I am
guessing that snmptrapd only sends traps and does not
listen for incoming traps or you need to configure
snmptrapd to listen for incoming traps. Either way,
the traps are arriving, but there is nothing on your
server to process them. There is probably
documentation on the website or in the source files on
how to achieve what you want.

Robert Wilcox

--- RajChandrasekaran@inautix.com wrote:

>
> I did a TCPDUMP and found tht the traps do reach the
> server from the router
> ...bit of relief !!! :-)))
>
> But the server sends back a icmp request to the
> router and reports that the
> udp port is unreachable ...
>
> Here's the output of TCPDUMP
>
> 11:23:36.745041 172.25.63.23.55549 >
> inatpuxpms01.snmptrap:
> C=permitadp Trap(36) E:cisco.1.110
> 172.25.63.23 linkDown
> 501199095 .iso.org.dod=[|snmp]
>
> 172.25.63.23 --> router
> inatpuxpms01 -> server
>
> and then the error in the next line
>
> 11:23:36.745049 inatpuxpms01 > 172.25.63.23: icmp:
> inatpuxpms01 udp port
> snmptrap unreachable [tos 0xc0]
>
> Iam sort of confused y this error comes .... When i
> do the same in other
> server ( which receives traps successfully )) the
> 2nd line is not there..
>
> is tht anything to do with snmpconf ??? shud we
> change any default options
> ???
>
> Thanks in advance
>
>
> regards ,
> rajasekaran C
>
>
>
>
>
> Robert Story
>
> <rstory@freesnmp.
>
> com>
> To
>
> cnelson@nycap.rr.com
> 02/15/2005 11:26
> cc
> PM
> net-snmp-coders@lists.sourceforge.n
> et,
> RajChandrasekaran@inautix.com
>
> Subject
> Please respond to Re: Help
> wanted Regarding SNMPTRAP
> net-snmp-coders@l (URGENT)
>
> ists.sourceforge.
>
> net
>
>
>
>
>
>
>
>
>
>
>
>
>
> On Tue, 15 Feb 2005 07:51:29 -0500
> cnelson@nycap.rr.com wrote:
> CRC> > My router sents traps on link-down status to
> A linux box . In the
> CRC> > routerside its sending the packets perfectly
> to server .
> CRC>
> CRC> Have you configured your trap sinks correctly?
>
> Trapsinks are for the agent (snmpd) sending traps.
> He's talking about
> receiving
> traps (snmptrapd) from another box...
>
> The first thing I'd check is if snmptrapd is
> receiving the packets. Run it
> iin the foreground with packet dumping on:
>
> snmptrapd -f -Le -d
>
> Then generate the traps and see if the incoming
> packet is printed. If not,
> then
> I'm guessing that you have a firewall running which
> is blocking the
> packets.
> You need to open up UDP port 162 to receive traps.
>
> --
> Robert Story; NET-SNMP Junkie
> Support: <http://www.net-snmp.org/>
> <irc://irc.freenode.net/#net-snmp>
> Archive: <
>
http://sourceforge.net/mailarchive/forum.php?forum=net-snmp-coders>
>
> You are lost in a twisty maze of little standards,
> all different.
>
>
>
>
>
>
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