Re: [IPFIX] Initial review of draft-ietf-ipfix-mib-variable-export-03

On 11/03/2013 11:05 AM, Juergen Schoenwaelder wrote:
> On Fri, Nov 01, 2013 at 04:47:05AM +0100, Brian Trammell wrote:
>> (3) Clarifying and SNMP-naif question on 11.2.2 mibObjectIdentifier: it
>> seems from the examples that the intention is that the OID will be
>> encoded in the document as a Unicode string of digits and "."
>> characters? Is this the way OIDs are encoded in SNMP? The encoding of
>> fundamentally binary data in strings is not very IPFIXish (7013 section
>> 4.2 para 6), and I kind of expected these to be encoded as octetarrays
>> of unsigned integers of a specified size, or something similar. However,
>> if encoding-as-string is how things are done on the wire in SNMP, it's
>> the right thing to do here too (7013 section 4.5). The same comment
>> applies to 11.2.4.
>>
> SNMP uses ASN.1/BER and this gives you are much more compact encoding
> of OIDs (but this is of course a much less human/programmer friendly
> representation).

So, would a simple octetArray like Brian asked about make sense?  I'm
still not sure.

>> IpAddress -> ipv4Address (side question: how do you do V6 with SNMP?)
> The IPv6 address types are an OCTET STRING on the wire (not a tagged
> type anymore).

I've occasionally wondered if an ipAddress type (varlen 4 or 16 octets)
would be useful in IPFIX.

-Andrew
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