[c-nsp] copy tftp flash gives OOOOOO!OOOOOO!

[mack]

>
> Message: 5
> Date: Fri, 21 Dec 2007 10:00:23 +1100
> From: "Dale Shaw" <dale.shaw+cisco-nsp at gmail.com>
> Subject: Re: [c-nsp] copy tftp flash gives OOOOOO!OOOOOO!
> To: "Adam Greene" <maillist at webjogger.net>
> Cc: cisco-nsp at puck.nether.net
> Message-ID:
>         <3329cbb40712201500l31215b3end0887a4eddcb5201 at mail.gmail.com>
> Content-Type: text/plain; charset=WINDOWS-1252
>
> Hi all,
>
> > ----- Original Message -----
> > From: "Jeffrey Ollie" <jeff at ocjtech.us>
> > To: "Adam Greene" <maillist at webjogger.net>
> > Cc: <cisco-nsp at puck.nether.net>
> > Sent: Thursday, December 20, 2007 5:07 PM
> > Subject: Re: [c-nsp] copy tftp flash gives OOOOOO!OOOOOO!
> >
> > > The "O"s indicate that a TFTP packet was lost along the way.  As
> long
> > > as it completes the file should be OK but as Vijay says double-
> check
> > > the hashes.
>
> "O" actually means that the packet(s) arrived, but out of order.
>
> From:
> http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configu
> ration_guide_chapter09186a00800c6c63.html
>
> 8<---
>
>  General Output Conventions for Copy Operations
>
>  During a copy operation, any of the following characters may be
> printed to the screen:
>
>  ?A pound sign (#) generally means that a Flash memory device is being
> cleared and initialized. (Different platforms use different ways of
> indicating that Flash is being cleared.)
>  ?An exclamation point (!) means that ten packets have been
> transferred.
>  ?A series of "V" characters means that a checksum verification of the
> file is occurring after the file is written to Flash memory.
>  ?An "O" means an out-of-order packet.
>  ?A period (.) means a timeout.
>
>  The last line in the output indicates whether the copy was successful.
>

TFTP will not send a second until the first is acknowledged.
It will continue resending the same packet until an acknowledgement is received.
There is no windowing which would allow 'out of order' packets.

> 8<---
>
> cheers,
> Dale
>
>


--
LR Mack McBride
Network Administrator
Alpha Red, Inc.