Re: access to agent extension problem

姜宇 (Anthony Jiang) <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <[email protected]>
2011/3/4 姜宇 (Anthony Jiang) <[email protected]>

> Hi,
>     I developed an agent extension using dlmod method and added a
> read/write user, but cannot get any output when using SNMPv3.
>
>     The situation is like this:
>     snmpget -v2c -c public localhost sysDescr.0  #This works fine
>     snmpget -v2c -c public localhost customMIB.1.1.0 #This works fine
>     snmpget -v3 -l authPriv -u user_name -a SHA -A authPhrase -x AES -X
> privPhrase localhost sysDescr.0 #This works fine
>
> but when using SNMPv3 to access customMIB.1.1.0, snmpd received the packet,
> but does not reponse.
>     snmpget -v3 -l authPriv -u user_name -a SHA -A authPhrase -x AES -X
> privPhrase localhost customMIB.1.1.0    #No reponse
>
> Could any one tell me what this problem could be?
>
>
> --
>
I tried to solve this problem for a while, and found out that shouldn't put
the blame on access control or usm configuration.
It seems that SNMPv3 has some issue on multiprocessing problem.
I forked a child to write something into a fifo( child sleeps for 2
seconds), and read from the parent process.
It works fine with SNMPv2, but fails when using SNMPv3.

-- 
Best Wishes,
姜 宇 <[email protected]>
Anthony Jiang <[email protected]>

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