[ippm] Update proposal for draf-ietf-ippm-storetraceroutes - adding arbitrary data

[Antonin Kral <A.Kral at sh.cvut.cz>]

Hello,

I am working on one project in CESNET (Czech NREN), this project is part
of PerfSonar project as well. We want to store more information than
only RTT for each hop. These values could contain information like
available bandwidth on particular link, or installed capacity, queue
load etc. These information are not fetched by traceroute itself, but
from other programs which are able to communicate with so called
Measurement Points. Our idea is to use XML schema proposed by you to
stored measured data. Unfortunately there is no way how to add new
attributes without schema modification in current RFC draft.

I would like to propose new attribute, which could contain arbitrary
(application-dependant) data. Support for semantic of particular
attribute will be optional (every application will have own set of
supported attributes and their meaning). My idea is something like
the following XML (not schema):

<AdditionalData>
  <Attribute name="installed_bw" dataType="Unsigned32">
    1000
  </Attribute>
  <Attribute name="available_bw" dataType="Unsigned32">
    900
  </Attribute>
  <Attribute name="queue_length" dataType="Unsigned32">
    12
  </Attribute>
  <Attribute name="ingest_interface_name" dataType="String">
    GigabitEthernet6/0/1
  </Attribute>
</AdditionalData>

<AdditionalData> attribute should be optional in measurement description
(complex type _Metadata) as well as measurement results (complex type
_Measurement).

If you like the proposed way, I will be happy to prepare relevant XML
schema for this.

Thank you, best regards,

    Antonin Kral

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