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Checking the Status of a Device Running Junos OS

You can use show commands to check the status of the device and monitor the activities on the device.

To help you become familiar with show commands:

• Type show ? to display the list of show commands you can use to monitor the router:
  root@> show ?

  Possible completions:
    accounting           Show accounting profiles and records
    aps                  Show Automatic Protection Switching information
    arp                  Show system Address Resolution Protocol table entries
    as-path              Show table of known autonomous system paths
    bfd                  Show Bidirectional Forwarding Detection information
    bgp                  Show Border Gateway Protocol information
    chassis              Show chassis information
    class-of-service     Show class-of-service (CoS) information
    cli                  Show command-line interface settings
    configuration        Show current configuration
    connections          Show circuit cross-connect connections
    dvmrp                Show Distance Vector Multicast Routing Protocol        info
    dynamic-tunnels      Show dynamic tunnel information information
    esis                 Show end system-to-intermediate system information
    firewall             Show firewall information
    helper               Show port-forwarding helper information
    host                 Show hostname information from domain name server
    igmp                 Show Internet Group Management Protocol information
    ike                  Show Internet Key Exchange information
    ilmi                 Show interim local management interface information
    interfaces           Show interface information
    ipsec                Show IP Security information
    ipv6                 Show IP version 6 information
    isis                 Show Intermediate System-to-Intermediate System info
    l2circuit            Show Layer 2 circuit information
    l2vpn                Show Layer 2 VPN information
    lacp                 Show Link Aggregation Control Protocol information
    ldp                  Show Label Distribution Protocol information
    link-management      Show link management information
    llc2                 Show LLC2 protocol related information
    log                  Show contents of log file
    mld                  Show multicast listener discovery information
    mpls                 Show Multiprotocol Label Switching information
    msdp                 Show Multicast Source Discovery Protocol information
    multicast            Show multicast information
    ntp                  Show Network Time Protocol information
    ospf                 Show Open Shortest Path First information
    ospf3                Show Open Shortest Path First version 3 information
    passive-monitoring   Show information about passive monitoring
    pfe                  Show Packet Forwarding Engine information
    pgm                  Show Pragmatic Generalized Multicast information
    pim                  Show Protocol Independent Multicast information
    policer              Show interface policer counters and information
    policy               Show policy information
    ppp                  Show PPP process information
    rip                  Show Routing Information Protocol information
    ripng                Show Routing Information Protocol for IPv6 info
    route                Show routing table information
    rsvp                 Show Resource Reservation Protocol information
    sap                  Show Session Announcement Protocol information
    security             Show security information
    services             Show services information
    snmp                 Show Simple Network Management Protocol information
    system               Show system information
    task                 Show routing protocol per-task information
    ted                  Show Traffic Engineering Database information
    version              Show software process revision levels
    vpls                 Show VPLS information
    vrrp                 Show Virtual Router Redundancy Protocol information
  

• Use the show chassis routing-engine command to view the Routing Engine status:
  root@> show chassis routing-engine

  Routing Engine status:
    Slot 0:
      Current state                  Master
      Election priority              Master (default)
      Temperature                 31 degrees C / 87 degrees F
      CPU temperature             32 degrees C / 89 degrees F
      DRAM                       768 MB
      Memory utilization          84 percent
      CPU utilization:
        User                       0 percent
        Background                 0 percent
        Kernel                     1 percent
        Interrupt                  0 percent
        Idle                      99 percent
      Model                          RE-2.0
      Serial ID                      b10000078c10d701
      Start time                     2005-12-28 13:52:00 PST
      Uptime                        12 days, 3 hours, 44 minutes, 19 seconds
      Load averages:                 1 minute   5 minute  15 minute
                                         0.02       0.01       0.00
  

• Use the show system storage command to view available storage on the device:
  root@> show system storage

   
  Filesystem        Size       Used     Avail  Capacity   Mounted on
  /dev/ad0s1a       865M       127M      669M       16%  /
  devfs             1.0K       1.0K        0B      100%  /dev
  devfs             1.0K       1.0K        0B      100%  /dev/
  /dev/md0          30M        30M         0B      100%  /packages/mnt/jbase
  /dev/md1          158M       158M        0B      100%  /packages/mnt/jkernel-9.3B1.5
  /dev/md2          16M        16M         0B      100%  /packages/mnt/jpfe-M7i-9.3B1.5
  /dev/md3          3.8M       3.8M        0B      100%  /packages/mnt/jdocs-9.3B1.5
  /dev/md4          44M        44M         0B      100%  /packages/mnt/jroute-9.3B1.5
  /dev/md5          12M        12M         0B      100%  /packages/mnt/jcrypto-9.3B1.5
  /dev/md6          25M        25M         0B      100%  /packages/mnt/jpfe-common-9.3B1.5
  /dev/md7          1.5G       196K      1.4G        0%  /tmp
  /dev/md8          1.5G       910K      1.4G        0%  /mfs
  /dev/ad0s1e       96M        38K        88M        0%  /config
  procfs            4.0K       4.0K        0B      100%  /proc
  /dev/ad1s1f       17G        2.6G       13G       17%  /var