[c-nsp] Sup720 image

[Will Hargrave]

Phil Mayers wrote:

> I can't actually *test* it since the serial console in question is 
> actually via a 2511 serial breakout not a real console, but I'm guessing 
> it'll be like the *modem on the 2691 - a totally broken red herring, or 
> possibly unable to transfer files of the size required for sup720 images?

Cisco standard would be to have the command be accepted but silently 
fail giving no error. ;-)

I had a quick look at the XMODEM spec and couldn't see a max size limit; 
the block size count is designed to wrap. Of course any modern image 
would take so long to transfer it would fail due to demise of the 
operator :) Ymodem (-g?) would work better.

> FWIW I had the same experience with a 2691 ages ago - that is, without 
> another 2691 it can be nigh-on impossible to recover the image.

Maybe it would be a good SOP to dd the CF image from new boxes so 
there's something to recover from should it go wrong.

-- 
Will