Step 7: Check for 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:channel extensive

Sample Output

user@host# show interfaces t1-2/1/0:20 extensive                                     

Physical interface: t1-2/1/0:20, Enabled, Physical link is Up

  Interface index: 210, SNMP ifIndex: 173, Generation: 93

  Link-level type: Cisco-HDLC, MTU: 1504, Clocking: Internal, Speed: T1, 
Loopback: Local, FCS: 16,

  Mode: C/Bit parity, Framing: ESF

  Device flags   : Present Running

  Interface flags: Point-To-Point SNMP-Traps

  Link flags     : No-Keepalives

  Hold-times     : Up 0 ms, Down 0 ms

  CoS queues     : 4 supported

  Last flapped   : 2004-05-20 21:46:27 UTC (00:26:47 ago)

  Statistics last cleared: 2004-05-20 22:12:03 UTC (00:01:11 ago)

  Traffic statistics:

   Input  bytes  :                88680                27640 bps

   Output bytes  :                88680                27640 bps

   Input  packets:                 1010                   39 pps

   Output packets:                 1010                   39 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   : None

  DS3   alarms   : None

  DS1   defects  : None

  DS3   defects  : None

  T1  media:            Seconds        Count  State

    SEF                       0            0  OK

    BEE                       0            0  OK

    AIS                       0            0  OK

    LOF                       0            0  OK

    LOS                       0            0  OK

    YELLOW                    0            0  OK

    BPV                       0            0

    EXZ                       0            0

    LCV                       0            0

    PCV                       0            0

    CS                        0            0

    LES                       0

    ES                        0

    SES                       0

    SEFS                      0

    BES                       0

    UAS                       0

  DS3 media:            Seconds        Count  State

    PLL Lock                  0            0  OK

    Reframing                 0            0  OK

    AIS                       0            0  OK

    LOF                       0            0  OK

    LOS                       0            0  OK

    IDLE                      0            0  OK

    YELLOW                    0            0  OK

    BPV                       0            0

    EXZ                       0            0

    LCV                       0            0

    PCV                       0            0

    CCV                       0            0

    LES                       0

    PES                       0

    PSES                      0

    CES                       0

    CSES                      0

    SEFS                      0

    UAS                       0

  Interface transmit queues:

              B/W  WRR       Packets        Bytes        Drops       Errors

    Queue0     95   95             0            0            0            0

    Queue1      5    5          1010        88680            0            0

  HDLC configuration:

    Giant threshold: 1514, Runt threshold: 3

    Timeslots      : All active

    Line encoding: B8ZS, Byte encoding: Nx64K, Data inversion: Disabled, Idle 
cycle flag: flags,

    Start end flag: shared

  DS-3 BERT configuration:

    BERT time period: 10 seconds, Elapsed: 0 seconds

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

  DS1 BERT configuration:

    BERT time period: 10 seconds, Elapsed: 0 seconds

    Induced Error rate: 10e-0, Algorithm: 2^15 - 1, O.151, Pseudorandom (9)

  Packet Forwarding Engine configuration:

    Destination slot: 2, PLP byte: 2 (0x14)

    CoS transmit queue             Bandwidth           Buffer Priority   Limit

                              %          bps   %        bytes

    0 best-effort            95      1459200  95            0      low    none

    3 network-control         5        76800   5            0      low    none

  Logical interface t1-2/1/0:20.0 (Index 74) (SNMP ifIndex 213) (Generation 14)

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

    Protocol inet, MTU: 1500, Generation: 24, Route table: 0

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.10.1.1, Local: 10.10.1.2, Broadcast: Unspecified, 
Generation: 24

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).