Verifying DOCSIS Interfaces Properties

Purpose

Verify that the DOCSIS interface properties are configured properly.
Action

From the CLI configuration editor, enter the show interfaces interface-name extensive command.
Sample Output

show interfaces cm-1/0/0 extensive

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

  Interface index: 154, SNMP ifIndex: 522, Generation: 157

  Link-level type: Ethernet, MTU: 1518, Speed: 40mbps

  Link flags     : None

  Hold-times     : Up 0 ms, Down 0 ms

   State   : OPERATIONAL, Mode: 2.0, Upstream speed: 5120000 0 0 0

   Downstream scanning: CM_MEDIA_STATE_DONE, Ranging: CM_MEDIA_STATE_DONE

   Signal to noise ratio: 31.762909 21.390018  7.517472 14.924058

   Power: -15.756125 -31.840363 -31.840363 -31.840363

   Downstream buffers used           : 0

   Downstream buffers free           : 0

   Upstream buffers free             : 0

   Upstream buffers used             : 0

   Request opportunity burst         : 0 MSlots

   Physical burst                    : 0 MSlots

   Tuner frequency                   : 555 0 0 0 MHz

   Standard short grant              : 0 Slots

   Standard long grant               : 0 Slots

   Baseline privacy state: authorized, Encryption algorithm: ????, Key length: 0

  MAC statistics:                      Receive         Transmit

    Total octets                          1935             2036

    Total packets                            8                8

    CRC/Align errors                         0                0

    Oversized frames                         0

  CoS queues     : 8 supported, 8 maximum usable queues

  Current address: 00:24:dc:0d:76:19, Hardware address: 00:24:dc:0d:76:19

  Last flapped   : 2009-11-10 19:55:40 UTC (00:16:29 ago)

  Statistics last cleared: Never

  Traffic statistics:

   Input  bytes  :                  710                    0 bps

   Output bytes  :                  866                    0 bps

   Input  packets:                    2                    0 pps

   Output packets:                    4                    0 pps

  Packet Forwarding Engine configuration:

    Destination slot: 1

    Direction : Output

    CoS transmit queue               Bandwidth               Buffer Priority   Limit

                              %            bps     %           usec

    0 best-effort            95       38000000    95              0      low    none

    3 network-control         5        2000000     5              0      low    none

 

  Logical interface cm-1/0/0.0 (Index 69) (SNMP ifIndex 523) (Generation 134)

    Flags: Point-To-Point SNMP-Traps Encapsulation: ENET2

    Traffic statistics:

     Input  bytes  :                  710

     Output bytes  :                  806

     Input  packets:                    2

     Output packets:                    4

    Local statistics:

     Input  bytes  :                  710

     Output bytes  :                  806

     Input  packets:                    2

     Output packets:                    4

    Transit statistics:

     Input  bytes  :                    0                    0 bps

     Output bytes  :                    0                    0 bps

     Input  packets:                    0                    0 pps

     Output packets:                    0                    0 pps

    Security: Zone: Null

    Flow Statistics :

    Flow Input statistics :

      Self packets :                     0

      ICMP packets :                     0

      VPN packets :                      0

      Multicast packets :                0

      Bytes permitted by policy :        0

      Connections established :          0

    Flow Output statistics:

      Multicast packets :                0

      Bytes permitted by policy :        0

    Flow error statistics (Packets dropped due to):

      Address spoofing:                  0

      Authentication failed:             0

      Incoming NAT errors:               0

      Invalid zone received packet:      0

      Multiple user authentications:     0

      Multiple incoming NAT:             0

      No parent for a gate:              0

      No one interested in self packets: 0

      No minor session:                  0

      No more sessions:                  0

      No NAT gate:                       0

      No route present:                  0

      No SA for incoming SPI:            0

      No tunnel found:                   0

      No session for a gate:             0

      No zone or NULL zone binding       0

      Policy denied:                     0

      Security association not active:   0

      TCP sequence number out of window: 0

      Syn-attack protection:             0

      User authentication errors:        0

    Protocol inet, MTU: 1504, Generation: 147, Route table: 0

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 20.20.20/24, Local: 20.20.20.5, Broadcast: 20.20.20.255, Generation: 144
Meaning

The output shows a summary of information about the DOCSIS interface in this example.