Step 8: Check for T1 Interface Error Statistics

Purpose

Persistent interface error statistics indicate that you need to open a case with JTAC.

Action

To check the local interface for error statistics, 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 Up

  Interface index: 29, SNMP ifIndex: 20, Generation: 32

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

  Device flags   : Present Running

  Interface flags: Point-To-Point SNMP-Traps

  Link flags     : Keepalives

  Hold-times     : Up 0 ms, Down 0 ms

  Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3

  Keepalive statistics:

    Input : 28 (last seen 00:00:02 ago)

    Output: 32 (last sent 00:00:06 ago)

  Last flapped   : 2002-01-06 01:09:00 UTC (00:07:19 ago)

  Statistics last cleared: Never

  Traffic statistics:

   Input  bytes  :                84682                   80 bps

   Output bytes  :                92685                    0 bps

   Input  packets:                 1031                    0 pps

   Output packets:                 1077                    0 pps

  Input errors:

    Errors: 0, Drops: 0, Framing errors: 0, Policed discards: 70, L3 
incompletes: 0, L2 channel errors: 0, L2 mismatch timeouts: 0,

    HS link CRC errors: 0, SRAM errors: 0

  Output errors:

    Carrier transitions: 1, Errors: 0, Drops: 0, Aged packets: 0

  DS1   alarms   : None

  DS1   defects  : None

  T1  media:            Seconds        Count  State

    SEF                       1            1  OK

    BEE                       0            0  OK

    AIS                       0            0  OK

    LOF                       1            1  OK

    LOS                       0            0  OK

    YELLOW                    1            2  OK

    BPV                       1            1

    EXZ                       1            1

    LCV                       1            2

    PCV                       1            6

    CS                        0            0

    LES                       1

    ES                        1

    SES                       1

    SEFS                      1

    BES                       1

    UAS                       0

  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

  Logical interface t1-1/1/0.0 (Index 9) (SNMP ifIndex 34) (Generation 14)

    Flags: Point-To-Point SNMP-Traps Encapsulation: Cisco-HDLC

    Bandwidth: 0

    Protocol inet, MTU: 1500, Flags: None, Generation: 29 Route table: 0

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 1.1.1.0/30, Local: 1.1.1.1, Broadcast: Unspecified, 
Generation: 36

What It Means

Check for any error statistics that may appear in the output. There should not be any input or output errors. If there are any persistent input or output errors, open a case with JTAC at support@juniper.net, or at 1-888-314-JTAC (within the United States) or 1-408-745-9500 (from outside the United States).