Re: FCIP: v0.7 editorial suggestion

[Ralph Weber <ralphoweber@compuserve.com>]

Sudhir,

The people building FCIP devices place importance on
having the SF bit be the low order bit in a byte. They
believe that if SF should become a frame type field
in a yet to be considered replacement for FCIP, then
there is value in having that coded value in the low
order bits of a byte.

In short, I proposed what you suggested and got shot
down in flames.

Ralph...

Sudhir Srinivasan wrote:

> Ralph,
>
> If the bit positions are going to be changed, I still
> think it would be better to simply swap the positions
> of the Ch and SF bits in the pFlags bit. This has both
> benefits -- it allows for the "growth" of the SF bit
> as you outline below AND it makes the table consistent
> with the bit field definition and hence makes it easier
> to read/verify Figure 9.
>
> Regards,
> Sudhir
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Trebia Networks, Inc.    Sudhir.Srinivasan@trebia.com
> 978-929-0830 x139        www.trebia.com
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> > -----Original Message-----
> > From: Ralph Weber [mailto:ralphoweber@compuserve.com]
> > Sent: Wednesday, November 28, 2001 6:24 PM
> > To: Sudhir Srinivasan
> > Cc: Murali Rajagopal
> > Subject: Re: FCIP: v0.7 editorial suggestion
> >
> >
> > Sudhir,
> >
> > The FCIP authors have agreed to move the Ch bit from
> > bit 25 to bit 31. This change has the additional
> > advantage that the SF bit can grow to the 'frame type'
> > field if a compelling need arises.
> >
> > The new figure will look like this.
> >
> >        |----------------Bit--------------------|
> >        |                                       |
> >        | 31   30   29   28   27   26   25   24 |
> >        +----+-----------------------------+----+
> >        | Ch |          Reserved           | SF |
> >        +----+-----------------------------+----+
> >
> >        Fig. 8  pFlags Field Bits
> >
> > I don't know if this will fully lay to rest the
> > confusion you experienced, but it should help.
> >
> > Thanks.
> >
> > Ralph...