Step 3: Display Extensive Status Information for a Specific T3 Interface

Action

To display extensive status information about a specific T3 interface, use the following JUNOS CLI operational mode command:

user@host> show interfaces t3-fpc/pic/port extensive

Sample Output

user@router> show interfaces t3-1/0/0 extensive

Physical interface: t3-1/0/0, Enabled, Physical link is Down

  Interface index: 9, SNMP ifIndex: 10

  Link-level type: Cisco-HDLC, MTU: 4474, Clocking: Internal

  Speed: T3, Loopback: None, CRC: 16, Mode: C/Bit parity

  Device flags   : Present Running Down

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

  Link flags     : Keepalives

  Keepalive statistics:

    Input : 116 (last seen 00:02:59 ago)

    Output: 187 (last seen 00:00:09 ago)

  Statistics last cleared: Never

  Traffic statistics:

   Input  bytes  :                 2552                    0 bps

   Output bytes  :                 3703                    0 bps

   Input  packets:                  116                    0 pps

   Output packets:                  161                    0 pps

  Input errors:                        - Input errors

    Errors: 0, Drops: 0, Framing errors: 229, Policed discards: 1

    L3 incompletes: 0, L2 channel errors: 0, L2 mismatch timeouts: 0                                                    

    SRAM errors: 0, HS link CRC errors: 0

  Output errors:                        - Output errors

    Carrier transitions: 4, Errors: 0, Drops: 0, Aged packets: 0

  Active alarms  : LOF, LOS                        - DS3 active alarms and defects

  Active defects : LOF, LOS

  DS3 Media:            Seconds        Count  State - T3 media-specific errors

    PLL Lock                  0            0  OK

    Reframing               273            2  Defect Active

    AIS                       0            0  OK

    LOF                     273            2  Defect Active

    LOS                     273            2  Defect Active

    IDLE                      0            0  OK

    YELLOW                    0            0  OK

    BPV                       0            0

    EXZ                       0            0

    LCV                     275     18022125

    PCV                       0            0

    CCV                       0            0

    LES                     275

    PES                     273

    PSES                    273

    CES                     273

    CSES                    273

    SEFS                    273

    UAS                     277

  HDLC configuration:

    Policing bucket: Disabled

    Shaping bucket : Disabled

    Giant threshold: 4484, Runt threshold: 3

  DSU configuration:

    Compatibility mode: None, Scrambling: Disabled, Subrate: Disabled

    FEAC loopback: Inactive, Response: Disabled, Count: 0

    BERT time period: 10 seconds, Elapsed: 0 seconds

    Algorithm: 2^3 - 1, Pseudorandom (1), Error rate: 10e-0

  PFE configuration:

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

    COS transmit queue bandwidth:

      Queue0: 95, Queue1: 0, Queue2: 0, Queue3: 5

    COS weighted round robin:

      Queue0: 95, Queue1: 0, Queue2: 0, Queue3: 5

  Logical interface t3-1/0/0.0 (Index 12) (SNMP ifIndex 32)

    Flags: Device-down Point-To-Point SNMP-Traps, Encapsulation: Cisco-HDLC

    Protocol inet, MTU: 4470, Flags: None

      Addresses, Flags: Dest-route-down Is-Preferred Is-Primary

        Destination: 1.1.1.0/30, Local: 1.1.1.1, Broadcast: Unspecified

What It Means

The sample output shows where the errors might be occurring. Look at the active alarms and active defects for the T3 interface and investigate the T3 media accordingly. See Locate T3 Alarms and Errors for an explanation of T3 alarms.