Re: oids not displayed as strings when send in traps

On Wed, Oct 1, 2014 at 8:04 AM, Dharm S <[email protected]> wrote:

> Hi All,
>
> I have the following in one of the notification template.
>
> const oid sipCommonCfgServiceStartTime_oid[] = {
> 1,3,6,1,2,1,149,1,1,1,1,3, /* insert index here */ };
>
> It has 3 index values : two integers and one string.
>

This is strange, since the sipCommonCfgServiceStartTime in the MIB has one
index value, just the applIndex.


> How am I supposed to include the string value?
>
> i tried using row->indexes->index_oid instead of the below oid.
>
> But when received at trap, it replaces string by ascii values (ACK) as
> follows
>     SIP-COMMON-MIB::sipCommonStatusCodeIns.1.65.67.75.0.183
>

 sipCommonStatusCodeIns is a different OID than you supplied above.  Its
INDEXes are applIndex,
sipCommonStatusCodeMethod, sipCommonStatusCodeValue.  That's
INTEGER, SipTCMethodName (OCTET STRING), and Unsiged32.

According to http://tools.ietf.org/html/rfc2578#section-7.7 part (3), you
have to prepend the length of the string - so the interpretation of the OID
that you provided is that there's a 65-byte string, but there are not 65
bytes left in the OID so the parser just punts on trying to represent it as
a string.  The proper encoding of that string in that OID is

SIP-COMMON-MIB::sipCommonStatusCodeIns.1.3.65.67.75.183

and if you check with the command-line tool, that does translate:

% snmptranslate SIP-COMMON-MIB::sipCommonStatusCodeIns.1.3.65.67.75.183
SIP-COMMON-MIB::sipCommonStatusCodeIns.1."ACK".183

  Bill



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