[sip-clf] Using the PEN

[Chris Lonvick <[e-mail]>]

Hi,

I ran the question of using PEN=0 and PEN=<vendor id> past a few people.

IANA did not have an opinion.

David Harrington, the author of RFC5612 thinks that it would be good.
http://www.rfc-editor.org/rfc/rfc5612.txt

The best response I got was from Dan Romascanu who wrote:
>> PENs are using in various protocols and the usage of Enterprise Numbers
>> may (at least in theory) be different from protocol to protocol, so it
>> would be best if the respective protocol documents refer explicitly how
>> 'special' values like 0 are used. True, the convention that 0 is the
>> value reserved for IETF standards is widely used (for example to
>> identify standard notifications in SMI) but as SIP-CLF defines a
>> different DML I would suggest that adopting the convention is OK, and
>> mentioning it explicitly is best.

Bert Wijnen agreed with Dan.

Thanks,
Chris