Hello Bill,
Thank you for your post.
Well, I tried some configurations in my snmpd.conf, disabling ipv6, listen in
only one interface, etc.
but never tried trapsess, i.e. I already used trap2sink as ou can see in debug
dump I posted.
Do you have tried to use snmptrap to see how much duplicates your get in your
network?
An interesting fact is that if I enable IPV6 I get 128 duplicates without IPV6
I get 64…
Because of this I said that something is really wrong with the NET-SNMP network
code and how
its interpreting the network characteristics where is running.
Also with IPV6 enabled I waas unable to use agentaddress clause, with the 5.7.3
just a message saing that the end point couldnt
be used, with 5.8.dev. the message says that the end point couldn’t be used
because the address (anyone) is in use, what is
not true.
I also disabled IPV6 in my host where snmpd is running … no difference. 5.7.3
and 5.8 here
behaves exactly same duplicating packets.
And no others directives, my snmpd.conf is really simple.
Here is my snmpd.conf:
trap2sink 192.168.0.100 xyz
trap2sink 192.168.0.205 xyz
com2sec readonly default abc
com2sec readwrite default def
rocommunity abc
rwcommunity def
master agentx
agentaddress udp:192.168.0.221:161
agentXSocket /var/agentx/master
agentxperms 0660 0550 root root
agentxRetries 1
agentxTimeout 3
dontLogTCPWrappersConnects yes
agentuser root
agentgroup root
On Thu, Dec 28, 2017 at 2:02 PM, Jose Roberto Fernandez Anahia <
jrfndes@...> wrote:
> Something really .. really wrong with the network code on NET-SNMP.
>
You don't say much about *exactly* what's in your snmpd.conf, but I tried
this:
agentaddress udp:161,tcp:161,udp6:161,tcp6:161
trapsess -v 2c -c sekrit udp:172.25.24.236:162
and I got exactly one packet:
12:26:15.577079 44:4c:a8:64:2b:df > be:7e:8c:45:ca:7e, ethertype IPv4
(0x0800), length 138: (tos 0x0, ttl 59, id 43952, offset 0, flags [DF],
proto UDP (17), length 124)
172.30.188.156.57296 > 172.25.24.236.snmptrap: { SNMPv2c C="sekrit" {
V2Trap(81) R=456329610 .1.3.6.1.2.1.1.3.0=1869016
.1.3.6.1.6.3.1.1.4.1.0=.1.3.6.1.4.1.8072.4.0.3
.1.3.6.1.6.3.1.1.4.3.0=.1.3.6.1.4.1.8072.4 } }
This is using net-snmp 5.8.
Bill
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