Juniper

CTRL-C at boot for U-Boot

setenv loaddisk disk(n)   ( n=0 internal flash n=1 usb drive )
saveenv
boot

Space Bar at loader.conf

boot /s

Boot

request system reboot slice alternate media internal

start shell user root
cd /config/vchassis
rm vc*
exit

BACKUP/SNAPSHOT

• request system configuration rescue save
  • Turns off alarm if never done
• request system snapshot slice alternate (SRX)
  • Only works on SRX
• request system snapshot media external
  • Make a copy of everything to a USB device

ALARMS

• show system alarms
• show chassis alarms
• set chassis alarm management-ethernet link-down ignore

BPDU

• clear error bpdu interface ge-0/0/6 …
• set protocols layer2-control bpdu-block disable-timeout 30

BOOT

• run show system storage partitions
• EX series
  • request system snapshot media internal slice alternate
  • show system snapshot media internal
  • request system reboot slice alternate media internal