
From dromasca@avaya.com  Wed Apr  4 07:50:56 2012
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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "MIB Doctors" <mib-doctors@ietf.org>
Cc: eman@ietf.org
Subject: [eman] Entity MIBv4?
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Hi MIB Doctors,

I am not sure how many of you follow the EMAN WG which has a chartered
item for a Power and Energy Monitoring MIB -
http://www.ietf.org/id/draft-ietf-eman-energy-monitoring-mib-02.txt. One
of the issue they are encountering is the need to support a small subset
of objects from the Entity MIB composed of entPhysicalIndex,
entPhysicalName and entPhysicalUris (which in their case is read-only
and limited size). Full support of the Entity MIB as per RFC 4133 may
happen but they estimate it would be an extra-load for the devices
reporting power and energy information. A proposal was made to define
the subset of objects they need as a module compliance for small energy
reporting devices to be defined for the Entity MIB (see slides 8 and 9
in http://www.ietf.org/proceedings/83/slides/slides-83-eman-3.pdf).=20

My question is whether you see such a solution causing any problem?=20
Is it worth a v4 for the Entity MIB, or could it be done differently?=20

Thanks and Regards,

Dan




From j.schoenwaelder@jacobs-university.de  Wed Apr  4 08:18:16 2012
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From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
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Subject: Re: [eman] Entity MIBv4?
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On Wed, Apr 04, 2012 at 04:50:45PM +0200, Romascanu, Dan (Dan) wrote:
> Hi MIB Doctors,
> 
> I am not sure how many of you follow the EMAN WG which has a chartered
> item for a Power and Energy Monitoring MIB -
> http://www.ietf.org/id/draft-ietf-eman-energy-monitoring-mib-02.txt. One
> of the issue they are encountering is the need to support a small subset
> of objects from the Entity MIB composed of entPhysicalIndex,
> entPhysicalName and entPhysicalUris (which in their case is read-only
> and limited size). Full support of the Entity MIB as per RFC 4133 may
> happen but they estimate it would be an extra-load for the devices
> reporting power and energy information. A proposal was made to define
> the subset of objects they need as a module compliance for small energy
> reporting devices to be defined for the Entity MIB (see slides 8 and 9
> in http://www.ietf.org/proceedings/83/slides/slides-83-eman-3.pdf). 
> 
> My question is whether you see such a solution causing any problem? 
> Is it worth a v4 for the Entity MIB, or could it be done differently? 

Well, the IMHO biggest reason to spin the Entity MIB is to move the
physical class TC to IANA. EMAN also deals with batteries that there
is no proper physical class for it.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1, 28759 Bremen, Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>

From dromasca@avaya.com  Wed Apr  4 08:21:15 2012
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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "Juergen Schoenwaelder" <j.schoenwaelder@jacobs-university.de>
Cc: MIB Doctors <mib-doctors@ietf.org>, eman@ietf.org
Subject: Re: [eman] Entity MIBv4?
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> -----Original Message-----
> From: Juergen Schoenwaelder [mailto:j.schoenwaelder@jacobs-
> university.de]
> Sent: Wednesday, April 04, 2012 6:18 PM
> To: Romascanu, Dan (Dan)
> Cc: MIB Doctors; eman@ietf.org
> Subject: Re: [eman] Entity MIBv4?
>=20
> On Wed, Apr 04, 2012 at 04:50:45PM +0200, Romascanu, Dan (Dan) wrote:
> > Hi MIB Doctors,
> >
> > I am not sure how many of you follow the EMAN WG which has a
> chartered
> > item for a Power and Energy Monitoring MIB -
> > http://www.ietf.org/id/draft-ietf-eman-energy-monitoring-mib-02.txt.
> One
> > of the issue they are encountering is the need to support a small
> subset
> > of objects from the Entity MIB composed of entPhysicalIndex,
> > entPhysicalName and entPhysicalUris (which in their case is
read-only
> > and limited size). Full support of the Entity MIB as per RFC 4133
may
> > happen but they estimate it would be an extra-load for the devices
> > reporting power and energy information. A proposal was made to
define
> > the subset of objects they need as a module compliance for small
> energy
> > reporting devices to be defined for the Entity MIB (see slides 8 and
> 9
> > in http://www.ietf.org/proceedings/83/slides/slides-83-eman-3.pdf).
> >
> > My question is whether you see such a solution causing any problem?
> > Is it worth a v4 for the Entity MIB, or could it be done
differently?
>=20
> Well, the IMHO biggest reason to spin the Entity MIB is to move the
> physical class TC to IANA. EMAN also deals with batteries that there
> is no proper physical class for it.
>=20
> /js
>=20

[[DR]] Right, this too.=20

However, this would not be controversial (I believe) while the proposal
to define a compliance for a small subset of objects may raise some
brows.=20

Dan


From bertietf@bwijnen.net  Wed Apr  4 08:39:10 2012
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On 4/4/12 5:21 PM, Romascanu, Dan (Dan) wrote:
> [[DR]] Right, this too.
>
> However, this would not be controversial (I believe) while the proposal
> to define a compliance for a small subset of objects may raise some
> brows.

WHy would that raise brows? I think it is fine to define one
more (limited) module compliance, as long as you are clear
about what it is, what it is useful for and possibly some statements
as to which environments would be the appropriate place for them
(ala sort of a Applicabilty Statement; which could be in the
DESCRIPTION clause I would think).

Bert

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Juergen, Rolf, & Thomas,

I have reviewed the recently update to the draft Battery MIB and have the
below comments.  Most are simple syntax issues with a few issues of
substance around entPhysicalClass and unit declarations.

------------------

Sec 1 - Introduction
	"that provides means for"			-> suggest "that provides a means for"
	"Battery MIB module serves for"          -> suggest "Battery MIB module
provides for" instead
	"the Battery MIB allows to monitor"	-> suggest "allows us to monitor"

	"There is already instrumentation for monitoring battery status on many
battery-driven devices=8A"
=09
	This is a little hard to follow because you say 'already' and then
qualify it with 'many'.  Perhaps re-
	arrange this to=20
	-->"Many battery-driven devices have existing instrumentation for
monitoring battery status=8A"

"Not explicitly in scope of definitions in this document are very small
backup batteries'"=09
Sec 3.1 MIB Module Structure
-->What "definition" is being referred to here?  The EMAN requirements?


	You state "The kind of entity in the entPhysicalTable of the Entity MIB
module is indicated by the
	value of the enumeration object entPhysicalClass.  Since there is no
value called 'battery' defined for
	this object, it is RECOMMENDED that for batteries the value of this
object is chosen to be
	powerSupply(6)."

	-> Why not "other(1)"?  It seems misleading to call a battery a power
supply as traditionally a
	power supply is also a transformer that performs AC/DC conversion.  If a
managed entity for powerSupply(6)
	already exists on a device, then this might negatively affect management
tools that look for and manage
	power supplies.

	batteryLowAlarmCharge
	batteryLowAlarmVoltage

	->  Is there a reason 'Alarm' is inserted in the middle between "low" and
"charge" and not at the
	beginning or end?  I think it would be more readable if it was
batteryLowChargeAlarm.  Same for
	High/LowAlarmTemperature.

Sec 3.2 Battery Technologies

	"Battery type distinguished primary (not-rechargeable) batteries from
secondary (rechargeable) batteries."

	-> this statement is correct, but it had worried me at first because the
terms primary/secondary are not that
commonly used.   I think a sentence or two to explain primary cells and
secondary cells might be helpful here.

	"massively used technologies are often replaced by successor technologies"
	-> massively is a bold word.  You could soften this by stating "widely
used technologies=8A"

	"can be added to the IANA registry if new technologies get developed=8A"
	-> suggest "if new technologies are developed"

	-> The table with battery technology needs to be edited for case
consistency.  You have "Zinc-carbon" and
	"lithium-iron", and "Lithium ion".

Sec 4 Definitions

	batteryDesignVoltage OBJECT-TYPE
		SYNTAX		Unsigned32
		UNITS		"milllivolt"

	batteryDesignCapacity OBJECT-TYPE
		SYNTAX		Unsigned32
		UNITS		"milliampere hours"


	batteryMaxChargingCurrent
		SYNTAX		Unsigned32
		UNITS		"milliampere"


	-> For unit scale, the UPS-MIB uses 0.1 Amp DC.  I'm not sure which form
is preferred, milliamp or 0.01 Amp, so long as we are using the most
common syntax to represent scale.  Below are attributes from the UPS MIB

	upsBatteryVoltage OBJECT-TYPE
	SYNTAX     NonNegativeInteger
	UNITS      "0.1 Volt DC"

	upsBatteryCurrent OBJECT-TYPE
	SYNTAX     Integer32
	UNITS      "0.1 Amp DC"

	-> Also, should you clarify that the measured values are in DC?

	batteryActualCharge OBJECT-TYPE
		SYNTAX  Unsigned32
		UNITS "milliamphere hours"

	-> This would max-out at 4294 k-amp hours and might be best if it was an
Unsigned64 to provide greater headroom.

=09
	"This notification can be generated when the actual temperature=8A"

	-> Why 'actual'?  If its a measured temperature, it would be subject to
drift from actual.

Section 5 =AD Security Considerations

	"older and less performant as required for stable operation"

	-> suggest "then required for"

	"this may on one side lead to a costly too early replacement of a
battery.  But it may also cause
	That too old or too weak batteries are used.  This may have the
consequence that a battery
	cannot long enough provide power."

	-> needs to be re-phrased

	"that have legitimate rights to indeed GET or SET"

	-> the 'indeed' needs to be re-phrased or just removed

Section 6.2 =AD Battery Technology Registration

	"18 values for =8A"

	-> Generally, you should not start a sentence with a number, use
"Eighteen values for=8A"

Section 9.2 =AD Informative References
	[I-D.ietf-eman-framework]=8A  Silver, L.
	[I-D.ietf-eman-energy-monitoring-mib] .. Silver, L.

	-> You've swapped the town I reside in for my name.  It should be
"Schoening, B."




Regards,

Brad Schoening
Little Silver, New Jersey



On 3/7/12 8:48 AM, "internet-drafts@ietf.org" <internet-drafts@ietf.org>
wrote:

>
>A New Internet-Draft is available from the on-line Internet-Drafts
>directories. This draft is a work item of the Energy Management Working
>Group of the IETF.
>
>	Title           : Definition of Managed Objects for Battery Monitoring
>	Author(s)       : Juergen Quittek
>                          Rolf Winter
>                          Thomas Dietz
>	Filename        : draft-ietf-eman-battery-mib-05.txt
>	Pages           : 30
>	Date            : 2012-03-07
>
>   This memo defines a portion of the Management Information Base (MIB)
>   for use with network management protocols in the Internet community.
>   In particular, it defines managed objects that provide information on
>   the status of batteries in managed devices.
>
>
>A URL for this Internet-Draft is:
>http://www.ietf.org/internet-drafts/draft-ietf-eman-battery-mib-05.txt
>
>Internet-Drafts are also available by anonymous FTP at:
>ftp://ftp.ietf.org/internet-drafts/
>
>This Internet-Draft can be retrieved at:
>ftp://ftp.ietf.org/internet-drafts/draft-ietf-eman-battery-mib-05.txt
>
>_______________________________________________
>eman mailing list
>eman@ietf.org
>https://www.ietf.org/mailman/listinfo/eman


From bclaise@cisco.com  Mon Apr 16 02:01:01 2012
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From: Benoit Claise <bclaise@cisco.com>
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Subject: Re: [eman] [MIB-DOCTORS] Entity MIBv4?
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Hi Dan,

The most important reason to have an ENTITY-MIB v4 is the addition of a 
proper read-only UUID, as opposed to using the entPhysicalUris, or even 
defining an EMAN specific UUID.
So I support this work.

Regards, Benoit (as a contributor)
> Hi MIB Doctors,
>
> I am not sure how many of you follow the EMAN WG which has a chartered
> item for a Power and Energy Monitoring MIB -
> http://www.ietf.org/id/draft-ietf-eman-energy-monitoring-mib-02.txt. One
> of the issue they are encountering is the need to support a small subset
> of objects from the Entity MIB composed of entPhysicalIndex,
> entPhysicalName and entPhysicalUris (which in their case is read-only
> and limited size). Full support of the Entity MIB as per RFC 4133 may
> happen but they estimate it would be an extra-load for the devices
> reporting power and energy information. A proposal was made to define
> the subset of objects they need as a module compliance for small energy
> reporting devices to be defined for the Entity MIB (see slides 8 and 9
> in http://www.ietf.org/proceedings/83/slides/slides-83-eman-3.pdf).
>
> My question is whether you see such a solution causing any problem?
> Is it worth a v4 for the Entity MIB, or could it be done differently?
>
> Thanks and Regards,
>
> Dan
>
>
>
> _______________________________________________
> MIB-DOCTORS mailing list
> MIB-DOCTORS@ietf.org
> https://www.ietf.org/mailman/listinfo/mib-doctors
>
>


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From: "Mouli Chandramouli (moulchan)" <moulchan@cisco.com>
To: "Romascanu, Dan (Dan)" <dromasca@avaya.com>, "MIB Doctors" <mib-doctors@ietf.org>
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Thanks Dan.=20

As you have suggested some of the desirable features for ENTITY MIB V4
from an EMAN point of view shall be=20

 -  entPhysicalClass to be an IANA controlled list  =20
 -  is it possible to have a smaller set of ENTITY MIB objects for
possible compliance with  ENTITY-MIB=20
 -  entPhysicalUris to be read-only object=20
         -  representation of UUID compliant with rfc 4122 ?=20

Thanks
Mouli

-----Original Message-----
From: eman-bounces@ietf.org [mailto:eman-bounces@ietf.org] On Behalf Of
Romascanu, Dan (Dan)
Sent: Wednesday, April 04, 2012 8:21 PM
To: MIB Doctors
Cc: eman@ietf.org
Subject: [eman] Entity MIBv4?

Hi MIB Doctors,

I am not sure how many of you follow the EMAN WG which has a chartered
item for a Power and Energy Monitoring MIB -
http://www.ietf.org/id/draft-ietf-eman-energy-monitoring-mib-02.txt. One
of the issue they are encountering is the need to support a small subset
of objects from the Entity MIB composed of entPhysicalIndex,
entPhysicalName and entPhysicalUris (which in their case is read-only
and limited size). Full support of the Entity MIB as per RFC 4133 may
happen but they estimate it would be an extra-load for the devices
reporting power and energy information. A proposal was made to define
the subset of objects they need as a module compliance for small energy
reporting devices to be defined for the Entity MIB (see slides 8 and 9
in http://www.ietf.org/proceedings/83/slides/slides-83-eman-3.pdf).=20

My question is whether you see such a solution causing any problem?=20
Is it worth a v4 for the Entity MIB, or could it be done differently?=20

Thanks and Regards,

Dan



_______________________________________________
eman mailing list
eman@ietf.org
https://www.ietf.org/mailman/listinfo/eman

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On Thu, Apr 19, 2012 at 03:35:05AM -0500, Mouli Chandramouli (moulchan) wrote:
> Thanks Dan. 
> 
> As you have suggested some of the desirable features for ENTITY MIB V4
> from an EMAN point of view shall be 
> 
>  -  entPhysicalClass to be an IANA controlled list   
>  -  is it possible to have a smaller set of ENTITY MIB objects for
> possible compliance with  ENTITY-MIB 

You can have an additional conformance statement and compliance is
to a conformance statement not the ENTITY-MIB.

>  -  entPhysicalUris to be read-only object 

That won't happen; you can have a complaince statement that does not
require writable implementation.

>          -  representation of UUID compliant with rfc 4122 ? 

Not 100% sure what this means. entPhysicalUris can contain an RFC 4122
UUID URN. Perhaps you are asking for a separate entPhysicalUuid
object. If so, I am not sure you need the extra URN verbosity.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1, 28759 Bremen, Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>

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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "Juergen Schoenwaelder" <j.schoenwaelder@jacobs-university.de>, "Mouli Chandramouli (moulchan)" <moulchan@cisco.com>
Cc: MIB Doctors <mib-doctors@ietf.org>, eman@ietf.org
Subject: Re: [eman] Entity MIBv4?
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See in-line.=20

Regards,

Dan




> -----Original Message-----
> From: Juergen Schoenwaelder [mailto:j.schoenwaelder@jacobs-
> university.de]
> Sent: Thursday, April 19, 2012 11:54 AM
> To: Mouli Chandramouli (moulchan)
> Cc: Romascanu, Dan (Dan); MIB Doctors; eman@ietf.org
> Subject: Re: [eman] Entity MIBv4?
>=20
> On Thu, Apr 19, 2012 at 03:35:05AM -0500, Mouli Chandramouli
(moulchan)
> wrote:
> > Thanks Dan.
> >
> > As you have suggested some of the desirable features for ENTITY MIB
> V4
> > from an EMAN point of view shall be
> >
> >  -  entPhysicalClass to be an IANA controlled list
> >  -  is it possible to have a smaller set of ENTITY MIB objects for
> > possible compliance with  ENTITY-MIB
>=20
> You can have an additional conformance statement and compliance is
> to a conformance statement not the ENTITY-MIB.


[[DR]] Exactly.

>=20
> >  -  entPhysicalUris to be read-only object
>=20
> That won't happen; you can have a complaince statement that does not
> require writable implementation.
>=20

[[DR]] Of course. Other classes of entities will use the compliance
statement(s) that requires read-write access


> >          -  representation of UUID compliant with rfc 4122 ?
>=20
> Not 100% sure what this means. entPhysicalUris can contain an RFC 4122
> UUID URN. Perhaps you are asking for a separate entPhysicalUuid
> object. If so, I am not sure you need the extra URN verbosity.
>=20
[[DR]] This is the only issue that seems open in my view - meaning the
slides and discussions at the meeting did not seem to lead to a
conclusion. Do we expect cases where both a RFC 4122 compliant UUID
representation and also another entPhysicalUri format will be needed?

Dan
=20
> /js
>=20


From moulchan@cisco.com  Thu Apr 19 02:42:20 2012
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From: "Mouli Chandramouli (moulchan)" <moulchan@cisco.com>
To: "Romascanu, Dan (Dan)" <dromasca@avaya.com>, "Juergen Schoenwaelder" <j.schoenwaelder@jacobs-university.de>
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Cc: MIB Doctors <mib-doctors@ietf.org>, eman@ietf.org
Subject: Re: [eman] Entity MIBv4?
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Thanks. Replies inline.=20

Mouli

-----Original Message-----
From: Romascanu, Dan (Dan) [mailto:dromasca@avaya.com]=20
Sent: Thursday, April 19, 2012 2:32 PM
To: Juergen Schoenwaelder; Mouli Chandramouli (moulchan)
Cc: MIB Doctors; eman@ietf.org
Subject: RE: [eman] Entity MIBv4?

See in-line.=20

Regards,

Dan




> -----Original Message-----
> From: Juergen Schoenwaelder [mailto:j.schoenwaelder@jacobs-
> university.de]
> Sent: Thursday, April 19, 2012 11:54 AM
> To: Mouli Chandramouli (moulchan)
> Cc: Romascanu, Dan (Dan); MIB Doctors; eman@ietf.org
> Subject: Re: [eman] Entity MIBv4?
>=20
> On Thu, Apr 19, 2012 at 03:35:05AM -0500, Mouli Chandramouli
(moulchan)
> wrote:
> > Thanks Dan.
> >
> > As you have suggested some of the desirable features for ENTITY MIB
> V4
> > from an EMAN point of view shall be
> >
> >  -  entPhysicalClass to be an IANA controlled list
> >  -  is it possible to have a smaller set of ENTITY MIB objects for
> > possible compliance with  ENTITY-MIB
>=20
> You can have an additional conformance statement and compliance is
> to a conformance statement not the ENTITY-MIB.


[[DR]] Exactly.
[ycm] OK. A clarification from a novice. Those conformance statements
should included in the ENTITY-MIB conformance section ?=20

>=20
> >  -  entPhysicalUris to be read-only object
>=20
> That won't happen; you can have a complaince statement that does not
> require writable implementation.
>=20

[[DR]] Of course. Other classes of entities will use the compliance
statement(s) that requires read-write access
[ycm] OK



> >          -  representation of UUID compliant with rfc 4122 ?
>=20
> Not 100% sure what this means. entPhysicalUris can contain an RFC 4122
> UUID URN. Perhaps you are asking for a separate entPhysicalUuid
> object. If so, I am not sure you need the extra URN verbosity.
>=20
[[DR]] This is the only issue that seems open in my view - meaning the
slides and discussions at the meeting did not seem to lead to a
conclusion. Do we expect cases where both a RFC 4122 compliant UUID
representation and also another entPhysicalUri format will be needed?

[ycm] Two possible approaches for UUID representation as given in the
mailing list and slides=20
[ycm] http://www.ietf.org/mail-archive/web/eman/current/msg01287.html









Dan
=20
> /js
>=20


From dromasca@avaya.com  Thu Apr 19 02:51:54 2012
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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "Mouli Chandramouli (moulchan)" <moulchan@cisco.com>, "Juergen Schoenwaelder" <j.schoenwaelder@jacobs-university.de>
Cc: MIB Doctors <mib-doctors@ietf.org>, eman@ietf.org
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Hi,

See in-line.=20

Regards,

Dan




> -----Original Message-----
> From: Mouli Chandramouli (moulchan) [mailto:moulchan@cisco.com]
> Sent: Thursday, April 19, 2012 12:42 PM
> To: Romascanu, Dan (Dan); Juergen Schoenwaelder
> Cc: MIB Doctors; eman@ietf.org
> Subject: RE: [eman] Entity MIBv4?
>=20
> Thanks. Replies inline.
>=20
> Mouli
>=20
> -----Original Message-----
> From: Romascanu, Dan (Dan) [mailto:dromasca@avaya.com]
> Sent: Thursday, April 19, 2012 2:32 PM
> To: Juergen Schoenwaelder; Mouli Chandramouli (moulchan)
> Cc: MIB Doctors; eman@ietf.org
> Subject: RE: [eman] Entity MIBv4?
>=20
> See in-line.
>=20
> Regards,
>=20
> Dan
>=20
>=20
>=20
>=20
> > -----Original Message-----
> > From: Juergen Schoenwaelder [mailto:j.schoenwaelder@jacobs-
> > university.de]
> > Sent: Thursday, April 19, 2012 11:54 AM
> > To: Mouli Chandramouli (moulchan)
> > Cc: Romascanu, Dan (Dan); MIB Doctors; eman@ietf.org
> > Subject: Re: [eman] Entity MIBv4?
> >
> > On Thu, Apr 19, 2012 at 03:35:05AM -0500, Mouli Chandramouli
> (moulchan)
> > wrote:
> > > Thanks Dan.
> > >
> > > As you have suggested some of the desirable features for ENTITY
MIB
> > V4
> > > from an EMAN point of view shall be
> > >
> > >  -  entPhysicalClass to be an IANA controlled list
> > >  -  is it possible to have a smaller set of ENTITY MIB objects for
> > > possible compliance with  ENTITY-MIB
> >
> > You can have an additional conformance statement and compliance is
> > to a conformance statement not the ENTITY-MIB.
>=20
>=20
> [[DR]] Exactly.
> [ycm] OK. A clarification from a novice. Those conformance statements
> should included in the ENTITY-MIB conformance section ?
>=20


[[DR]] Yes, they are added to the existing conformance clauses.=20

> >
> > >  -  entPhysicalUris to be read-only object
> >
> > That won't happen; you can have a complaince statement that does not
> > require writable implementation.
> >
>=20
> [[DR]] Of course. Other classes of entities will use the compliance
> statement(s) that requires read-write access
> [ycm] OK
>=20
>=20
>=20
> > >          -  representation of UUID compliant with rfc 4122 ?
> >
> > Not 100% sure what this means. entPhysicalUris can contain an RFC
> 4122
> > UUID URN. Perhaps you are asking for a separate entPhysicalUuid
> > object. If so, I am not sure you need the extra URN verbosity.
> >
> [[DR]] This is the only issue that seems open in my view - meaning the
> slides and discussions at the meeting did not seem to lead to a
> conclusion. Do we expect cases where both a RFC 4122 compliant UUID
> representation and also another entPhysicalUri format will be needed?
>=20
> [ycm] Two possible approaches for UUID representation as given in the
> mailing list and slides
> [ycm] http://www.ietf.org/mail-archive/web/eman/current/msg01287.html
>=20
>=20
>
[[DR]] So, are you arguing that there is a need for a separate object?=20


From j.schoenwaelder@jacobs-university.de  Thu Apr 19 03:26:42 2012
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On Thu, Apr 19, 2012 at 04:42:11AM -0500, Mouli Chandramouli (moulchan) wrote:
 
> > >          -  representation of UUID compliant with rfc 4122 ?
> > 
> > Not 100% sure what this means. entPhysicalUris can contain an RFC 4122
> > UUID URN. Perhaps you are asking for a separate entPhysicalUuid
> > object. If so, I am not sure you need the extra URN verbosity.
> > 
> [[DR]] This is the only issue that seems open in my view - meaning the
> slides and discussions at the meeting did not seem to lead to a
> conclusion. Do we expect cases where both a RFC 4122 compliant UUID
> representation and also another entPhysicalUri format will be needed?
> 
> [ycm] Two possible approaches for UUID representation as given in the
> mailing list and slides 
> [ycm] http://www.ietf.org/mail-archive/web/eman/current/msg01287.html

The question is whether it is wise to encode a UUID, which is
essentially 16 binary octets, in a representation that requires 45
octets. I am pretty optimistic that a DISPLAY-HINT definition can be
provided that renders 16 binary octets into something like
"f81d4fae-7dec-11d0-a765-00a0c91e6bf6".

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1, 28759 Bremen, Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>
