Step 6: Check for ATM 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 at-fpc/pic/port extensive 

Sample Output

The following sample output is for an OC-3 ATM interface:

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

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

  Interface index: 22, SNMP ifIndex: 42, Generation: 21

  Link-level type: ATM-PVC, MTU: 4482, Clocking: Internal, SONET mode, Speed: 
OC3, Loopback: None, Payload scrambler: Enabled

  Device flags   : Present Running

  Link flags     : None

  Hold-times     : Up 0 ms, Down 0 ms

  Statistics last cleared: 2002-07-29 14:28:14 EDT (00:00:26 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, Invalid VCs: 0, Framing errors: 0, Policed discards: 0, 
L3 incompletes: 0, L2 channel errors: 0,

    L2 mismatch timeouts: 0

  Output errors:

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

  SONET alarms   : None

  SONET defects  : None

  SONET PHY:            Seconds        Count  State

    PLL Lock                  0            0  OK

    PHY Light                 0            0  OK

  SONET section:

    BIP-B1                    0            0

    SEF                       0            0  OK

    LOS                       0            0  OK

    LOF                       0            0  OK

    ES-S                      0

    SES-S                     0

    SEFS-S                    0

  SONET line:

    BIP-B2                    0            0

    REI-L                     0            0

    RDI-L                     0            0  OK

    AIS-L                     0            0  OK

    BERR-SF                   0            0  OK

    BERR-SD                   0            0  OK

    ES-L                      0

    SES-L                     0

    UAS-L                     0

    ES-LFE                    0

    SES-LFE                   0

    UAS-LFE                   0

  SONET path:

    BIP-B3                    0            0

    REI-P                     0            0

    LOP-P                     0            0  OK

    AIS-P                     0            0  OK

    RDI-P                     0            0  OK

    UNEQ-P                    0            0  OK

    PLM-P                     0            0  OK

    ES-P                      0

    SES-P                     0

    UAS-P                     0

    ES-PFE                    0

    SES-PFE                   0

    UAS-PFE                   0

  Received SONET overhead:

    F1      : 0x00, J0      : 0x00, K1      : 0x00, K2      : 0x00

    S1      : 0x00, C2      : 0x13, C2(cmp) : 0x13, F2      : 0x00

    Z3      : 0x00, Z4      : 0x00, S1(cmp) : 0x00, V5      : 0x00

    V5(cmp) : 0x00

  Transmitted SONET overhead:

    F1      : 0x00, J0      : 0x01, K1      : 0x00, K2      : 0x00

    S1      : 0x00, C2      : 0x13, F2      : 0x00, Z3      : 0x00

    Z4      : 0x00, V5      : 0x00

  ATM status:

    HCS state:     Sync

    LOC      :       OK

  ATM Statistics:

    Uncorrectable HCS errors: 0, Correctable HCS errors: 0, Tx cell FIFO 
overruns: 0, Rx cell FIFO overruns: 0,

    Rx cell FIFO underruns: 0, Input cell count: 0, Output cell count: 8830024, 
Output idle cell count: 8830026,

    Output VC queue drops: 0, Input no buffers: 0, Input length errors: 0, Input 
timeouts: 0, Input invalid VCs: 0,

    Input bad CRCs: 0, Input OAM cell no buffers: 0

  PFE configuration:

    Destination slot: 2

    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 at-2/0/0.0 (Index 29) (SNMP ifIndex 49) (Generation 28)

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

    Traffic statistics:

     Input  bytes  :                    0

     Output bytes  :                    0

     Input  packets:                    0

     Output packets:                    0

    Local statistics:

     Input  bytes  :                    0

     Output bytes  :                    0

     Input  packets:                    0

     Output packets:                    0

    Transit statistics:

     Input  bytes  :                    0                    0 bps

     Output bytes  :                    0                    0 bps

     Input  packets:                    0                    0 pps

     Output packets:                    0                    0 pps

    Protocol inet, MTU: 4470, Flags: None, Generation: 31 Route table: 0

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 192.168.1.0/30, Local: 192.168.1.1, Broadcast: Unspecified, 
Generation: 59

    VCI 1.100

      Flags: Active

      Total down time: 0 sec, Last down: Never

      ATM per-VC transmit statistics:

       Tail queue packet drops: 0

      Traffic statistics:

       Input  bytes  :                    0

       Output bytes  :                    0

       Input  packets:                    0

       Output packets:                    0

Sample Output

The following sample output is for a T3 ATM interface:

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

Physical interface: at-0/1/0, Enabled, Physical link is Up

  Interface index: 90, SNMP ifIndex: 18, Generation: 89

  Link-level type: ATM-PVC, MTU: 4482, Clocking: Internal, Speed: T3, Loopback: 
None, Payload scrambler: Enabled,

  Mode: C/Bit parity, Line buildout: 10, ATM Encapsulation: PLCP

  Device flags   : Present Running

  Link flags     : None

  Hold-times     : Up 0 ms, Down 0 ms

  Current address: 00:90:69:0c:c0:1f

  Last flapped   : 2002-08-14 16:25:07 UTC (00:00:21 ago)

  Statistics last cleared: 2002-08-14 16:25:26 UTC (00:00:02 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, Invalid VCs: 0, Framing errors: 0, Policed discards: 0, 
L3 incompletes: 0, L2 channel errors: 0,

    L2 mismatch timeouts: 0

  Output errors:

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

  Active alarms  : None

  Active defects : None

  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

    YELLOW                    0            0  OK

    EXZ                       0            0

    LCV                       0            0

    PCV                       0            0

    FERR                      0            0

    LES                       0

    PES                       0

    PSES                      0

    SEFS                      0

    UAS                       0

  PLCP defects:         Seconds        Count  State

    LOF                       0            0

    YELLOW                    0            0

  ATM defects:          Seconds        Count  State

    LCD                       0            0

  ATM status:

    HCS state:     Sync

    LOC      :       OK

  PLCP statistics (errored seconds):

    Framing errors               : 0(0)

    Bit interleaved parity errors: 0(0)

    Far end block errors         : 0(0)

  ATM Statistics:

    Uncorrectable HCS errors: 0, Correctable HCS errors: 0, Tx cell FIFO 
overruns: 0, Rx cell FIFO overruns: 0,

    Rx cell FIFO underruns: 0, Input cell count: 0, Output cell count: 96041, 
Output idle cell count: 96040,

    Output VC queue drops: 0, Input no buffers: 0, Input length errors: 0, Input 
timeouts: 0, Input invalid VCs: 0,

    Input bad CRCs: 0, Input OAM cell no buffers: 0

  Packet Forwarding Engine configuration:

    Destination slot: 0

    CoS transmit queue             Bandwidth           Buffer Priority   Limit

                              %          bps   %        bytes

    0 best-effort            95     42499200  95            0      low    none

    3 network-control         5      2236800   5            0      low    none

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 the 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).