How to get/generate the engine ID for SNMP v3?

[Sumit Mhatre]

Hi all,

       I am using Net-SNMP for generating SNMP traps in my product. So, I am just shipping snmptrap.exe which I invoke with appropriate parameters. Well, I did not face any issue with SNMP v2c.

 But with SNMP v3, I am not getting:

1.  What value should I put for -e option i.e. EngineID ?

2. Or can I set/define it to random number?

Note: I am not running(nor shipping) snmpd as I just want to add trap capability.

Please suggest.

[Pushpa Thimmaiah]

Hi Sumit,

. Refer RFC https://www.ietf.org/rfc/rfc2571.txt for engineID format.
--------------------------------------------------------------------------------------------------

snmpEngineID has a length of 12 octets.

1st bit: either '0' or '1' . '1' if you follow below mentioned formats

1-4 octets: binary equivalent of the agent's SNMP management private enterprise number

5th octet : Type of next(6-12th) octet ipaddress, mac address, random number.

            Eg: If 5th octet=3 then 6-12th octet is mac-id of the host.

--------------------------------------------------------------------------------------------------

Since SNMP engineID is unique to the host/machine on which snmpapp running ,  its better to get value for 
option'-e' from external code.  

Thank you.

Pushpa.T

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[Sumit Mhatre]

Thanks Pushpa! I will go through the link.

Regards,

Sumit