RE: [Wbemservices-development] managing a device using WBEM only .

[Andrea W. <an...@ci...>]

Steve, The advantages of WBEM/CIM come from a single, federated data
model that addresses everything from the low level hardware, through the
network, to storage and applications. SNMP does not and will not do
this.  CMIP went in this path, although CIM/WBEM's goal is to be more
closely associated to what the providers and consumers of the data need,
vs OSI abstractions, and to run over web technologies such as HTTP.

The values are to the consumer of the data - and in development reuse of
the model. 

One thing that this industry gets beaten up for, is that we have
thousands of products with thousands of MIBs (and MIBs are good for
reading, but not writing management data). So, the questions are how to
do configuration with the same data that you use for monitoring, and why
not bring together the 80% of common data, into a common model?  These
are the goals of CIM. 

Andrea

-----Original Message-----
From: steve smith [mailto:ste...@ho...] 
Sent: Friday, May 02, 2003 3:44 AM
To: Carl.Chan@Sun.COM
Cc: wbe...@op...;
wbe...@li...
Subject: Re: [Wbemservices-development] managing a device using WBEM
only .


Hi Carl,


Thanks for the help. My next question concerns the use of WBEM in
managing 
networks. If my network consists of SNMP and CMIP devices, then I will
have 
to design SNMP and CMIP enabled providers. My manager (WBEM Client) will

send a request to my CIMOM server and this request is passed onto the 
appropriate provider. This process is slower than a simple SNMP,CMIP
manager 
talking directly to an SNMP/CMIP agent. What are the advantages of using

WBEM or incorporating it into an existing management application?  Also,
in 
my provider , must I hard-code the SNMP OIDs values or is there some
kind of 
mapping between CIM and SNMP MIBS ?

Thanks.

Steve.





>From: Carl Chan <Carl.Chan@Sun.COM>
>To: steve smith <ste...@ho...>
>CC: wbe...@op...,
>wbe...@li...
>Subject: Re: [Wbemservices-development] managing a device using WBEM
only .
>Date: Thu, 01 May 2003 16:53:54 -0400
>
>Hi Steve,
>
>I hope my answers will not be too rudimentary for you, but here goes.
>
>To enable a device to be managed by a WBEM client app ultimately 
>requires
>implementing WBEM providers for those CIM classes of the CIM schema
that 
>are appropriate for your device.
>
>So a first step is to identify the classes the CIM Schema that relate 
>to
>your device. This is not a trivial exercise if you are not familiar
with 
>the CIM data model. This list also depends upon the set of management 
>operations you wish to perform on your device and the types of
information 
>you wish to expose.
>
>After identifying the base and association classes you need, then you 
>must
>implement providers for each of them. In Java WBEM Services (JWS), the 
>provider/cimom interface is well defined. Implementing WBEM providers 
>ultimately requires writing code that maps each CIM property and method
to 
>its appropriate device specific interface.
>
>Simple example providers can be found in the sdk/examples are of the 
>JWS
>source tree.
>
>Hope this helps.
>
>steve smith wrote:
>>Hello,
>>
>>I am new to WBEM/CIM and would be grateful if someone could answer a
>>couple of questions for me ?
>>What are the steps involved in managing a device , say a router, using

>>WBEM/CIM only. Essentially I'm interested in how the device will
interact 
>>with the CIMOM. What must I incorporate into my router to allow it to 
>>become managable within a WBEM enviroment ? Or do I have to use , say
a 
>>SNMP enabled provider to interact with my router.
>>
>>Thanks,
>>
>>Steve.
>>
>>
>>
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>
>--
>Carl Chan
>Sun Microsystems Inc.
>46 Lizotte Dr
>MS: UMAR04
>Marlboro, MA 01752
>781 442-0554
>781 442-7198 fax
>email:  car...@su...
>


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