at the u-boot prompt, i can get the device to pull down an image from tftp server:
*****
=> tftpboot junos-arm-32-15.1X53-D56.tgz
ETH LINK UP: 1000FD
Using bcmiproc_eth-0 device
TFTP from server 192.168.6.53; our IP address is 192.168.6.150
Filename 'junos-arm-32-15.1X53-D56.tgz'.
Load address: 0x61000000
Loading: #################################################################
....
########################################################
603.5 KiB/s
done
Bytes transferred = 252393868 (f0b398c hex)
=>
*****
but it doesn't do anything with it. what am i missing here? 