[ECOS] problem after telnet to target

Gary Thomas gary@mlbassoc.com
Fri Dec 20 17:44:00 GMT 2002

On Fri, 2002-12-20 at 08:52, Shivaji Navale _01307908 wrote:
> can someone  help me on this issue.
> On Thu, 19 Dec 2002, Shivaji Navale _01307908 wrote:
> > Hi,
> >
> > We prepared redboot bootable binary from latest CVS.
> > after telnet to i486 target, we got the redboot prompt.
> > But there was no response for any commands.
> > The target was able to be  ping'ed.
> > However, when on target console all was fine.
> > The connection times out for gdb (ethernet) for the same target.

This makes sense - nothing is getting into the board.

> > when using the prebuilt binary obtained from redhat source page, all
> > worked fine.

Why are you building your own image?

You could always force network debugging on (look in the RedBoot
code) to see what's happening when you try and send data to the
box (the debug info should come out on the serial port).

> > But when using the same boot image  on another i486 target,
> > didnt give above problems.

Since PC platforms are all so different, this also makes sense.

> >
> > PS: target when pinged by packet size > 150 bytes doesn't respond,
> > this happened also for the bin image from redhat source page.
> >

Are you sure that you don't mean > 1500 bytes?  The RedBoot stack
does not support IP fragments which are required for such large

Gary Thomas                 |
MLB Associates              |  Consulting for the
+1 (970) 229-1963           |    Embedded world
http://www.mlbassoc.com/    |
email: <gary@mlbassoc.com>  |
gpg: http://www.chez-thomas.org/gary/gpg_key.asc

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