Re: [CCAMP] Benjamin Kaduk's Discuss on draft-ietf-ccamp-alarm-module-08: (with DISCUSS and COMMENT)

stefan vallin <stefan@wallan.se> Wed, 10 April 2019 06:21 UTC

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From: stefan vallin <stefan@wallan.se>
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Date: Wed, 10 Apr 2019 08:21:49 +0200
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Cc: The IESG <iesg@ietf.org>, draft-ietf-ccamp-alarm-module@ietf.org, Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, ccamp-chairs@ietf.org, ccamp@ietf.org
To: Benjamin Kaduk <kaduk@mit.edu>
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Subject: Re: [CCAMP] Benjamin Kaduk's Discuss on draft-ietf-ccamp-alarm-module-08: (with DISCUSS and COMMENT)
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Hi Benjamin!

> On 10 Apr 2019, at 04:30, Benjamin Kaduk <kaduk@mit.edu>; wrote:
> 
>> An alarm might not have an underlying fault as a cause. For example,
>> imagine a bad Mean Opppinion Score (MOS) alarm from a Voice Over IP
>> (VOIP) probe and the cause being non-optimal QoS configuration.
>>> 
>>>  o  Alarm Type: An alarm type identifies a possible unique alarm state
>>>     for a resource.  Alarm types are names to identify the state like
>>>     "link-alarm", "jitter-violation", "high-disk-utilization".
>>> 
>>> Are these only intended for human consumption?
>> No, these are YANG identities and intended for automation software as well
> 
> I think my follow-up question was going to be whether there was value in a
> registry for them, to avoid proliferation of nearly-identical types from
> different vendors.  (I honestly don't know.)

Well the YANG modules are the “registry”, the important thing here is that 
identities are hierarchical, this will avoid the pollution problem. In some
previous alarm standards we have certainly had a registration/pollution problem
when alarm types where defined as flat enums (probable cause in X733 and derivatives).

See 3.2.  Alarm Type

br Stefan