Hi,
I am using Net-snmp-5.7.3 source and compiled an agent with SNMP V3 support
and installed the agent on the Linux target.
I am able to perform GET and SET with the users added and able to send
Informs to one destination for one user. If I try to send Informs to more
than one destination with the same user or different user then just cold
start trap is being delivered to all destinations but subsequent Informs
are delivered to only the first destination in the snmpd.conf. But if I
configure one as inform destination and all other destinations are trap
destinations then its working the same trap delivered to all destinations.
If I use “snmpinform” command to send the inform then I can send informs
to any destination.
By looking into snmpd.conf man page, I could understand that the way
informs work is different from traps with V3. There is a handshake about
engine ID and then the Inform being sent.
I would like to know is it the expected behavior with Informs? or am I
doing anything wrong in the configuration? I can only have one inform
destination?
Below the details about agent configuration file.
*Details:*
Snmpd.conf:
rwuser user1 authpriv
rouser user2 authnopriv
trapsess –v 3 –Ci –r 72 –t 1200 –u user1 –a SHA –A <authkey> -x AES –X
<enckey> -l authpriv 192.168.1.100:162 (always works)
trapsess –v 3 –Ci –r 72 –t 1200 –u user2 –a SHA –A <authkey> -l authnopriv
192.168.1.101:162 (not working)
If I make it as trap then it works.
trapsess –v 3 –u user2 –a SHA –A <authkey> 192.168.1.101:162 (working)
Created users using create user directives in the persistent file. My path
is /var/net-snmp/snmpd.conf
Create user entries:
Createuser user1 SHA <authkey> AES <enckey>
Createuser user2 SHA <authkey>
When I started the agent createuser entries are properly replaced with
usmuser and hashed entries for auth and enc key.
Appreciate your response.
Raj.
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