TROUBLESHOOTING
set cli timestamp (logs timestamp on cli for all commands you run. Very useful)
show system uptime
show chassis hardware
show chassis fpc detail
show chassis environment
show chassis alarms
show configuration | display detail
show configuration | display inheritance (displays inherited config from a group)
show system statistics (displays tcp, udp, icmp, arp, ...packet statistics)
show system commit (displays last 50 commits)
show system rollback compare <commit #>
<commit #> (displays the
differences between two commits)
USER MANAGEMENT
show system users (displays logged in users)
request system logout user (terminates a user's session)
request message all message
"<message>" (send
message to all logged in users)
FIREWALL
show security flow session (displays active sessions for given source,
destination parameters)
show security match-policies (displays which policy would match for given
source, destination parameters)
show configuration groups junos-defaults (displays pre-defined Junos Applications)
NAT
show security nat source [summary|rule|pool] (displays source nat rules and details)
show security nat static rule (displays static nat rules and details)
show security nat destination [summary|rule|pool] (displays destination nat rules and details)
FIBRE OPTICS
show interfaces diagnostics optics <interface
name> (displays sfp module
rx/tx power values)
SWITCHING AND ARP
show ethernet-switching table (displays mac address table)
clear ethernet-switching table <mac-address>
show arp [no-resolve] (displays ip to mac table)
clear arp [interface|hostname]
ROUTING
show route table <routing-table-name>
show route terse
show route forwarding-table
OSPF
show ospf neighbor [extensive]
show ospf overview
show ospf interface
show ospf database detail
show ospf route [abr|asbr|extern]
clear ospf neighbor <neighbor ip>
BGP
show bgp summary
show bgp neighbor <neighbor ip>
show route advertising protocol bgp (displays the advertised routes via bgp)
show route receiving protocol bgp (displays the received routes via bgp)
clear bgp neighbor <neighbor ip>
[soft|soft-inbound]
DHCP RELAY
show dhcp relay statistics
show dhcp relay binding
clear dhcp relay binding
IPv6
show ipv6 router-advertisement (displays the ipv6 enabled interfaces with ra
statistics)
show ipv6 neighbors (displays ipv6 address to mac address table)
CPU & MEMORY
show chassis routing-engine
request chassis routing-engine master switch (to switchover routing engine mastership)
show system processes extensive (displays cpu and memory usage of software
processes)
restart <process-name> (restarts a specific software process)
show route summary (displays max limits and the numbers of active routes per routing
table)
show system virtual-memory (displays detailed memory usage)
show task memory detail (displays detailed memory usage)
VIRTUAL CHASSIS
show virtual-chassis status (displays virtual chassis members status)
show virtual-chassis vc-port (displays virtual chassis ports details)
request virtual-chassis vc-port [set|delete] (to set or delete virtual chassis ports)
TRACEOPTIONS CONFIG (creates process specific debug output)
traceoptions file <filename>
traceoptions file size <file size>
traceoptions file files <# of files>
traceoptions flag <events to be monitored>
TECHNICAL SUPPORT REQUIRED DATA
request support information | save
/var/tmp/<filename>.txt
file archive compress source
/var/tmp/<filename>.txt destination /var/tmp/<filename>.txt.tgz
show system core-dumps
