#2743 HIGH Product: In manufacturing, multicast download of images is highly desirable.

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#2743: In manufacturing, multicast download of images is highly desirable.
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  Reporter:  jg                   |       Owner:  dwmw2           
      Type:  defect               |      Status:  new             
  Priority:  high                 |   Milestone:  Production Start
 Component:  ofw - open firmware  |     Version:                  
Resolution:                       |    Keywords:                  
  Verified:  0                    |  
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Comment (by dwmw2):

 I have found a consumer access point (Buffalo Airstation WHR-HP-G54) which
 allows the multicast rate to be configured. There are probably others, but
 this one seems to work. Again, I get relatively reliable sending at
 11Mb/s.

 There is an image suitable for putting on a USB stick, at
 http://david.woodhou.se/olpc-nandcast.tar.gz

 It will boot, associate with the network 'OLPCSENDER', erase the flash and
 wait to receive an image streamed to ff0f:114 port 12345. This is simple
 enough to tweak, in the /init script.

 To extract the initrd.img, 'mkdir foo ; cd foo ; zcat ../initrd.img | cpio
 -id'
 To recreate it having made changes, 'find | cpio -o -H newc | gzip -9 >
 ../initrd.img'

 Further 802.11 interoperability testing would be useful. I've been seeing
 strange behaviour from the wireless device on my test unit (it isn't
 always detected on the USB bus, doesn't always load its firmware
 successfully, and doesn't always associate successfully), but I think this
 might be the unit which Richard rejected yesterday for suspend/resume
 testing because the wireless was malfunctioning.

 If we could manage to send these packets from another libertas device,
 that would be really useful.

-- 
Ticket URL: <https://dev.laptop.org/ticket/2743#comment:3>
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