Re: length of snmpEngineID

On Tue, Apr 23, 2024 at 09:51:08AM +0530, Pushpa Thimmaiah wrote:
> Hi All,
> 
> Could you please let me know length of snmpEngineID.  Is it 12 octets or 32
> octets.
> 
> In RFC 3411 (https://www.ietf.org/rfc/rfc3411.txt) ,
> mib object 'snmpEngineID' says  12 octets in description and 32 octet in

You have to read the whole text.

An snmpEngineID has a syntax of OCTET STRING (SIZE(5..32))

If the first bit of the snmpEngineID is 0 and it is 12 octets long then it
might have been generated using the algorithm described in bullet 2 which is
copied from rfc1910.

If the first bit is 1 then it is generated in accordance with one of the
methods in bullet 3 (or RFC5343) but it is important to notice that bullets
1-3 are just an recommended algorithm, not a mandatory one so you should
treat snmpEngineID a a variable length string and not attempt to parse it.

/MF