Re: FCIP: Comment 120

[Ralph Weber <ralphoweber@compuserve.com>]

Mallikarjun,

> >... the "FC/FCIP Entity Identifier" is unique only within the scope 
> >of the given FC Entity's WWN. ... the model allows multiple FCIP 
> >Entities to be associated with the FC Fabric Entity WWN.
>
> If that is so, please add an architectural model diagram (similar to
> Figure 3, or perhaps convert Figure 3 into) which clearly shows this
> 1-to-n association.
>
> This is the only hint in the document (at least that I found) which
> suggests the stated possibility.  Figure 3 with 1-to-1 association almost
> seemed like the architectural model, but on careful reading, is only
> an example.

The fact that the "FC/FCIP Entity Identifier" is unique only within
the scope of a given FC Entity's WWN seems to be clearly stated in the
definition of the field:

  "The Source FC/FCIP Entity Identifier field SHALL contain a unique 
  identifier for the FC Entity FCIP Entity pair that generates (as opposed 
  to echoes) the Special Frame. The value is assigned by the FC Fabric 
  entity whose world wide name appears in the Source FC Fabric Entity World 
  Wide Name field.

  "Note: The combination of the Source FC Entity World Wide Name and Source 
  FCIP Entity Identifier fields uniquely identifies every FC Entity FCIP 
  Entity pair in the IP Network."

The requested figure relies on Fibre Channel concepts and thus appears
in a T11 document, FC-BB-2, ftp://ftp.t11.org/t11/pub/fc/bb-2/02-030v1.pdf.
See Figure 23 on PDF page 87, or Figure 26 on PDF page 94.

Thanks.

.Ralph

"Mallikarjun C." wrote:

>
> Ralph,
>
> > http://www.ietf.org/internet-drafts/draft-ietf-ips-fcip-wglc-01.pdf
> ....
> > Please review these comments resolutions to ensure that
> > the desired changes are described.
>
> Sorry for the delayed review, I have additional comments on wglc-01
> for Comment 120.
>
> Regards.
> --
> Mallikarjun
>
> Mallikarjun Chadalapaka
> Networked Storage Architecture
> Network Storage Solutions Organization
> Hewlett-Packard MS 5668
> Roseville CA 95747
> cbm@rose.hp.com
>
> >Comment 120
> >> 8. The FCIP Special Frame
> >......
> >> Note: The combination of the Source FC Entity World Wide Name and
> >> Source FCIP Entity Identifier fields uniquely identifies every FC
> >> Entity FCIP Entity pair in the IP Network.
> >....
> >- Also I take it that the "FC/FCIP Entity Identifier" is unique only
> >within the scope of the given FC Entity's WWN. So, does the model
> >allow multiple FCIP Entities to be associated with the FC Fabric
> >Entity WWN?
> >....
> >Response to the second bullet: Yes, the "FC/FCIP Entity Identifier"
> >is unique only within the scope of the given FC Entity's WWN. Yes,
> >the model allows multiple FCIP Entities to be associated with the FC
> >Fabric Entity WWN.
> >
>
> If that is so, please add an architectural model diagram (similar to
> Figure 3, or perhaps convert Figure 3 into) which clearly shows this
> 1-to-n association.
>
> This is the only hint in the document (at least that I found) which
> suggests the stated possibility.  Figure 3 with 1-to-1 association almost
> seemed like the architectural model, but on careful reading, is only
> an example.