Re: rap-sppi-02 EXTENDS clause instance mapping??

[Juergen Schoenwaelder <schoenw@ibr.cs.tu-bs.de>]

>>>>> Rawlins, Diana writes:

Diana> I've look closely at section 8.8 as well as the Framework PIB
Diana> and COPS-PR documents.  It must be a case of "seeing but not
Diana> understanding!"

Diana> So does the PDP specify an EXTENDs policy using two bindings?
Diana> The first binding installs the base row policy instance and the
Diana> second binding installs the EXTEND's policy instance. The PRID
Diana> of the second binding is constructed using the PRC OID of the
Diana> EXTENDs table object and the instance ID of the base instance
Diana> as the last sub-identifier. Is that how to accomplish the
Diana> mapping EXTENDS policy is installed?

I think so - although I must admit that I am not that much a COPS-PR
expert. I think the handling of AUGMENTS and EXTENDS is exactly the
same from the COPS-PR perspective. If you understand how to handle
AUGMENTS, then it should be obvious how to handle EXTENDS. ;-)

Diana> Is it true that a base row instance is not reused by multiple
Diana> EXTENDS instances?

I don't think this statement is generally true. You can have multiple
AUGMENTS on a single base row (at least in the SMIv2) and I would
expect that you can have multiple EXTENDS on a single base row. Note
that this does not imply that multiple EXTENDS on a single base row
always make semantically sense.

/js

-- 
Juergen Schoenwaelder      Technical University Braunschweig
<schoenw@ibr.cs.tu-bs.de>  Dept. Operating Systems & Computer Networks
Phone: +49 531 391 3289    Bueltenweg 74/75, 38106 Braunschweig, Germany
Fax:   +49 531 391 5936    <URL:http://www.ibr.cs.tu-bs.de/~schoenw/>