I had a hard time returning to the stable R77.20.87 (990173004) firmware ! I tried to upload the firmware for install in vain as the update process was failing every time. I then managed to do the revert using CLI which is quite easy !
# pfrm2.0/opt/fw1/bin/firmware_ver.sh
Usage: firmware_ver.sh [-d |-r|-v]
-d : Download from given URL to given path and verify checksum
-r : Revert to saved image
-v : Display firmware versions
I currently have:
[Expert@seven-eleven]# pfrm2.0/opt/fw1/bin/firmware_ver.sh -v
77 20 87 990173004 /dev/mtd2 77 20 87 990173042 /dev/mtd4
The first one shown is active, and "Revert to saved image" installs the older firmware shown on the right hand while keeping the current configuration - pretty simple...
CCSE / CCTE / CTPS / CCME / CCSM Elite / SMB Specialist