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Verifying ADSL Interface Properties

Purpose

Verify that the interface properties are correct.

Action

From the CLI, enter the show interfaces interface-name extensive command.


user@host> show interfaces at-3/0/0 extensive
Physical interface: at-3/0/0, Enabled, Physical link is Up
  Interface index: 141, SNMP ifIndex: 23, Generation: 48
  Link-level type: ATM-PVC, MTU: 4482, Clocking: Internal, ADSL mode, Speed: ADSL,
  Loopback: None
  Device flags   : Present Running
  Link flags     : None
  CoS queues     : 8 supported
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: 00:05:85:c7:44:3c
  Last flapped   : 2005-05-16 05:54:41 PDT (00:41:42 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                 4520                    0 bps
   Output bytes  :                39250                    0 bps
   Input  packets:                   71                    0 pps
   Output packets:                 1309                    0 pps
  Input errors:
    Errors: 0, Drops: 0, Invalid VCs: 0, Framing errors: 0, Policed discards: 0,
    L3 incompletes: 0, L2 channel errors: 1, L2 mismatch timeouts: 0, Resource errors: 0
  Output errors:
    Carrier transitions: 3, Errors: 0, Drops: 0, Aged packets: 0, MTU errors: 0,
    Resource errors: 0
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort                    4                    4                    0
    1 expedited-fo                   0                    0                    0
    2 assured-forw                   0                    0                    0
    3 network-cont                2340                 2340                    0
  ADSL  alarms   : LOS, LOM, LOCDNI, FAR_LOF,  FAR_LOS, FAR_LOCDNI
  ADSL  defects  : LOF, LOS, LOCDNI, FAR_LOF,  FAR_LOS, FAR_LOCDNI
  ADSL media:            Seconds        Count  State
    LOF                  239206            2  OK
    LOS                  239208            1  OK
    LOM                       3            1  OK
    LOP                       0            0  OK
    LOCDI                     3            1  OK
    LOCDNI               239205            1  OK
  ADSL status:
    Modem status  : Showtime
    DSL mode      :     Auto    Annex A
    Last fail code: ATU-C not detected
  ADSL Statistics:                        ATU-R                  ATU-C
    Attenuation (dB)         :              0.5                    0.0
    Capacity used (%)        :               81                     72
    Noise margin (dB)        :              9.0                    9.5
    Output power (dBm)       :              7.5                    8.5

                                  Interleave       Fast  Interleave       Fast
    Bit rate (kbps)   :                    0       8128           0        896
    CRC               :                    0          3           0          0
    FEC               :                    0          0           0          0
    HEC               :                    0          3           0          0
    Received cells    :                    0        287
    Transmitted cells :                    0       4900
    Bit error rate    :                    0          0
  ATM status:
    HCS state:     Hunt
    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: 0, Output idle cell count: 0, 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: 3
    CoS transmit queue               Bandwidth               Buffer Priority   Limit
                              %            bps     %          bytes
    0 best-effort            95        7600000    95              0      low    none
    3 network-control         5         400000     5              0      low    none

  Logical interface at-3/0/0.0 (Index 66) (SNMP ifIndex 28) (Generation 23)
    Flags: Point-To-Point SNMP-Traps 16384 Encapsulation: ATM-PPP-LLC
    Traffic statistics:
     Input  bytes  :                 2432
     Output bytes  :                    0
     Input  packets:                  116
     Output packets:                    0
    Local statistics:
     Input  bytes  :                 1810
     Output bytes  :                    0
     Input  packets:                   78
     Output packets:                    0
    Transit statistics:
     Input  bytes  :                  622                    0 bps
     Output bytes  :                    0                    0 bps
     Input  packets:                   38                    0 pps
     Output packets:                    0                    0 pps
  Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
  Keepalive statistics:
    Input : 33 (last seen 00:00:03 ago)
    Output: 34 (last sent 00:00:03 ago)
  LCP state: Opened
  NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls: Not-configured
  CHAP state: Success
    Protocol inet, MTU: 4470, Generation: 24, Route table: 0
      Flags: None
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 155.55.5.1, Local: 155.55.5.2, Broadcast: Unspecified, Generation: 45
    VCI 0.35
      Flags: Active, 1024
      Total down time: 0 sec, Last down: Never
      ATM per-VC transmit statistics:
       Tail queue packet drops: 0
      Traffic statistics:
       Input  bytes  :                 2432
       Output bytes  :                    0
       Input  packets:                  116
       Output packets:                    0

  Logical interface at-3/0/0.32767 (Index 69) (SNMP ifIndex 25) (Generation 21)
    Flags: Point-To-Multipoint No-Multicast SNMP-Traps 16384 Encapsulation: ATM-VCMUX
    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
    VCI 0.4
      Flags: Active, 1024
      Total down time: 0 sec, Last down: Never
      ATM per-VC transmit statistics:
       Tail queue packet drops: 0
      Traffic statistics:
       Input  bytes  :                  208
       Output bytes  :                  208
       Input  packets:                    4
       Output packets:                    4

What it Means

The output shows a summary of interface information. Verify the following information:

Examine the operational statistics for an ADSL interface. Statistics in the ATU-R (ADSL transceiver unit–remote) column are for the near end. Statistics in the ATU-C (ADSL transceiver unit–central office) column are for the far end.

See Also

For a complete description of show interfaces extensive output, see the JUNOS Interfaces Command Reference.

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