Step 3: Display Extensive Status Information for a Specific T1 Interface

Action

To display extensive status information about a specific T1 interface, use the following JUNOS CLI operational mode command:

user@host> show interfaces t1-fpc/pic/port extensive

Sample Output

user@host> show interfaces t1-1/1/0 extensive    

Physical interface: t1-1/1/0, Enabled, Physical link is Down

  Interface index: 24, SNMP ifIndex: 20, Generation: 27

  Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: 
None, FCS: 16, Framing: ESF

  Device flags   : Present Running Down

  Interface flags: Hardware-Down Point-To-Point SNMP-Traps

  Link flags     : Keepalives

  Hold-times     : Up 0 ms, Down 0 ms

  Last flapped   : 2002-01-01 00:00:35 UTC (00:01:00 ago)

  Statistics last cleared: 2002-01-01 00:01:03 UTC (00:00:32 ago)

  Traffic statistics:

   Input  bytes  :                    0                    0 bps

   Output bytes  :                    0                    0 bps

   Input  packets:                    0                    0 pps

   Output packets:                    0                    0 pps

  Input errors:

    Errors: 0, Drops: 0, Framing errors: 0, Policed discards: 0, L3 incompletes: 
0, L2 channel errors: 0, L2 mismatch timeouts: 0,

    HS link CRC errors: 0, SRAM errors: 0

  Output errors:

    Carrier transitions: 0, Errors: 0, Drops: 0, Aged packets: 0

  DS1   alarms   : LOF, LOS

  DS1   defects  : LOF, LOS

  T1  media:            Seconds        Count  State

    SEF                      32            0  Defect Active

    BEE                       0            0  OK

    AIS                       0            0  OK

    LOF                      32            0  Defect Active

    LOS                      32            0  Defect Active

    YELLOW                    0            0  OK

    BPV                       0            0

    EXZ                       0            0

    LCV                       0            0

    PCV                      32        10667

    CS                        0            0

    LES                       0

    ES                       32

    SES                      32

    SEFS                     32

    BES                       0

    UAS                      32

  HDLC configuration:

    Policing bucket: Disabled

    Shaping bucket : Disabled

    Giant threshold: 1514, Runt threshold: 3

    Timeslots      : All active

    Line encoding: B8ZS, Byte encoding: Nx64K, Data inversion: Disabled

    Buildout       : 0 to 132 feet

  DS1 BERT configuration:

    BERT time period: 10 seconds, Elapsed: 0 seconds

    Induced Error rate: 10e-0, Algorithm: Unknown (0)

  Packet Forwarding Engine configuration:

    Destination slot: 1, PLP byte: 1 (0x00)

    CoS transmit queue          Bandwidth          Buffer     Priority   Limit

                              %          bps   %        bytes

    0 best-effort             0            0   0            0      low    none

    1 expedited-forwarding    0            0   0            0      low    none

    2 assured-forwarding      0            0   0            0      low    none

    3 network-control         0            0   0            0      low    none

What It Means

The sample output shows where the errors might be occurring. Look at the active alarms and active defects for the T1 interface and investigate the T1 media accordingly. See Locate T1 Alarms and Errors for an explanation of T1 alarms.