Step 1: Display the Status of a Specific ATM2 IQ Interface

Action

To display the status of a specific ATM2 IQ interface, use the following JUNOS CLI operational mode commands:

user@host> show interfaces terse at-fpc/pic/port

user@host> show interfaces at-fpc/pic/port

Sample Output 1

user@host> show interfaces terse at-2/2/0

Interface               Admin Link Proto Local                 Remote

at-2/2/0                up    up  

at-2/2/0.100            up    up   inet  10.16.5.1/24

at-2/2/0.101            up    up   inet  10.16.250.253/30

at-2/2/0.200            up    up   inet  20.20.20.1/30

at-2/2/0.300            up    up   inet  30.30.30.1/30

at-2/2/0.400            up    up   inet  40.40.40.1/30

at-2/2/0.32767          up    up 

Sample Output 2

user@host> show interfaces at-2/2/0          

Physical interface: at-2/2/0, Enabled, Physical link is Up

  Interface index: 138, SNMP ifIndex: 26

  Link-level type: ATM-PVC, MTU: 4482, Clocking: Internal, SONET mode, Speed: 
OC12, Loopback: None,

  Payload scrambler: Enabled

  Device flags   : Present Running

  Link flags     : None

  CoS queues     : 4 supported

  Current address: 00:90:69:d6:d5:3a

  Last flapped   : 2004-05-03 14:32:52 UTC (02:41:35 ago)

  Input rate     : 0 bps (0 pps)

  Output rate    : 0 bps (0 pps)

  SONET alarms   : None

  SONET defects  : None

    VPI 1

      Flags: Active

      Total down time: 0 sec, Last down: Never

  Traffic statistics:

         Input  packets:                    0

         Output packets:                   18

  Logical interface at-2/2/0.100 (Index 67) (SNMP ifIndex 36) 

    Flags: Point-To-Multipoint SNMP-Traps Encapsulation: Ether-over-ATM-LLC

  Input packets : 0 

  Output packets: 7

    Protocol inet, MTU: 1500

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 172.16.5/24, Local: 172.16.5.1, Broadcast: 172.16.5.255

    VCI 1.100

      Flags: Active, Shaping, Multicast

      VBR, Peak: 66kbps, Sustained: 66kbps, Burst size: 40

      Total down time: 0 sec, Last down: Never

      EPD threshold: 0, Transmit weight cells: 0

      Input packets : 0 

      Output packets: 14

  Logical interface at-2/2/0.101 (Index 68) (SNMP ifIndex 37) 

    Flags: Point-To-Point SNMP-Traps Encapsulation: ATM-SNAP

  Input packets : 0 

  Output packets: 2

    Protocol inet, MTU: 4470

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 172.16.250.252/30, Local: 172.16.250.253, Broadcast: 
172.16.250.255

    VCI 1.101

      Flags: Active

      Total down time: 0 sec, Last down: Never

      EPD threshold: 0, Transmit weight cells: 0

      Input packets : 0 

      Output packets: 2

  Logical interface at-2/2/0.200 (Index 69) (SNMP ifIndex 8280) 

    Flags: Point-To-Point SNMP-Traps Encapsulation: ATM-SNAP

  Input packets : 0 

  Output packets: 0

    Protocol inet, MTU: 4470

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 20.20.20.0/30, Local: 20.20.20.1, Broadcast: 20.20.20.3

    VCI 1.200

      Flags: Active

      Total down time: 0 sec, Last down: Never

      EPD threshold: 0, Transmit weight cells: 0

      Input packets : 0 

      Output packets: 0

  Logical interface at-2/2/0.300 (Index 70) (SNMP ifIndex 8281) 

    Flags: Point-To-Point SNMP-Traps Encapsulation: ATM-SNAP

  Input packets : 0 

  Output packets: 0

    Protocol inet, MTU: 4470

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 30.30.30.0/30, Local: 30.30.30.1, Broadcast: 30.30.30.3

    VCI 1.300

      Flags: Active

      Total down time: 0 sec, Last down: Never

      EPD threshold: 0, Transmit weight cells: 0

      Input packets : 0 

      Output packets: 0

  Logical interface at-2/2/0.400 (Index 72) (SNMP ifIndex 8282) 

    Flags: Point-To-Point SNMP-Traps Encapsulation: ATM-SNAP

  Input packets : 0 

  Output packets: 0

    Protocol inet, MTU: 4470

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 40.40.40.0/30, Local: 40.40.40.1, Broadcast: 40.40.40.3

    VCI 1.400

      Flags: Active

      Total down time: 0 sec, Last down: Never

      EPD threshold: 0, Transmit weight cells: 0

      Input packets : 0 

      Output packets: 0

  Logical interface at-2/2/0.32767 (Index 71) (SNMP ifIndex 27) 

    Flags: Point-To-Multipoint No-Multicast SNMP-Traps Encapsulation: ATM-VCMUX

  Input packets : 0 

  Output packets: 0 

    VCI 1.4

      Flags: Active

      Total down time: 0 sec, Last down: Never

      EPD threshold: 0, Transmit weight cells: 0

      Input packets : 0 

      Output packets: 0

What It Means

The first line of the sample output shows that the physical link and all logical links are up. This means that the interface can pass packets.

Further down the sample output, look for active alarms and defects. If there are any, and to further diagnose the problem, see Display Extensive Information for a Specific ATM2 Interface to display more extensive information about the ATM interface and the physical interface that is down.