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SubjectRe: [RFC-2] Configuring Synchronous Interfaces in Linux
I have a vested interest in how this all turns out.  I own a Packet Over SONET
device driver for our OC-12 and OC-48 NICs that I currently pass all parameters
to the driver via arguments on the insmod. To avoid lengthy commands, we
provide the common defaults. We accept some basic ifconfig input, but with
SONET/SDH and chip specific items that needed to be controlled, ifconfig did not
seem the way to go.


Greg Parrott
Lucent Technologies, Inc.
Optical Area Networking
(919) 838-6095

Alan Cox wrote:

> > - Media: V.35, RS-232, X.21, T1, E1
> DS1, DS3, ...
> > - Protocol: Frame Relay, (Cisco)-HDLC, PPP, X.25 (not sure whether that is
> > already supported by the 'hw' option)
> Not nicely.
> > - Clock: 'ext' (or 0, which implies external clock) or some numeric value
> > > 0 (which implies internal clock); setting it to 'int' would set
> > it to some fixed numeric value > 0 (useful for T1/E1 links, just
> > to indicate master clock as opposed to slave or 'ext' clock)
> Yep
> > I'm sure that _all_ the other sync cards need to configure the _same_
> > parameters (or a subset of them), and there may be cards that need even
> And more
> Generic Z85x30 drivers can run with multiple framing CRC versions (all the
> chip can do in theory). So I think you need
> bitcoding [NRZ, NRZI]
> crctype CRC16, ...
> hunt
> > I'm willing to go for this implementation, but I wanted to know first:
> > - whether ifconfig is the right place to do it;
> > - where I should create the new ioctl's to handle these new parameters.
> I think a new ioctl would be sensible. There is a lot to go in it.

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