Re: Net-snmp: How to receive a trap with random engine ID?

Hi
On 6/3/2011 1:39 AM, chengkeke wrote:
> Hi All,
>
> *I have a issue about receiving snmp v3 trap.*
> Is it possible to receive a trap if use a random engine id when send 
> the trap? If yes, how can I config it?

That is likely impossible and is maybe especially true for authPriv 
Traps, without knowing a fixed engineID, there is no way for snmptrapd 
to process config file and localize the pass-phrases you specified into 
correspondent keys.

It is also wrong for a SNMP agent to send out traps using random 
engineIDs, it must use its own engineIDs. For Inform PDU it should use 
the receiver's engineID.


Xiang
> [Notes: In MIB browser, it can parsing trap information with random 
> engineid. ]
>
> _If use a fix engine id, I can see the trap information by the 
> following steps:_
> 1. Create a snmptrapd.conf
> createUser -e 0x80001F88807053AC784DC8E6F3 test-read MD5 12345678 DES 
> 12345678
> createUser ruckus-read MD5 12345678 DES 12345678
> authUser log,execute,net test-read
> 2. In my computer, start snmptrapd with the comamnd: snmptrapd -c 
> snmptrapd.conf -f -Le -d
> 3. Use snmptrap send a trap from our device. [With the engine id 
> '0x80001F88807053AC784DC8E6F3']
> 4. We can see v3 trap information in my computer.
>
> Thanks all.
>
> Cherry Cheng
>
>
>
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-- 
Xiang Li
http://www.champnms.com

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