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Check Your Work

To verify that SCU is functioning properly, use the following commands:

show interfaces interface-name statistics
show interfaces interface-name (extensive | detail)
show route (extensive | detail)
show interfaces source-class source-class-name interface-name
clear interface interface-name statistics

You should always verify SCU statistics at the outbound SCU interface on which you configured the output statement. You can follow three steps to check the functionality of SCU:

Clear all counters on your SCU-enabled router and verify that they are empty.
Send a ping from one edge router to another edge router to generate SCU traffic across the SCU-enabled router.
Verify that the counters are incrementing correctly on the outbound interface.

The following section shows the output of these commands as used with the configuration example.

Step One:

Clear the Counters

user@scu> clear interfaces statistics all

user@scu> show interfaces so-0/0/1.0 statistics

  Logical interface so-0/0/1.0 (Index 4) (SNMP ifIndex 119)

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

    Protocol inet, MTU: 4470

      Source class                             Packets                Bytes

                      scu-class-a                    0                    0

                      scu-class-b                    0                    0

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.255.50/24, Local: 10.255.50.1

user@scu> show interfaces so-0/0/3.0 statistics

  Logical interface so-0/0/3.0 (Index 6) (SNMP ifIndex 113)

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

    Protocol inet, MTU: 4470

      Source class                             Packets                Bytes

                      scu-class-a                    0                    0

                      scu-class-b                    0                    0

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.255.10/24, Local: 10.255.10.3

user@scu> show interfaces source-class scu-class-a so-0/0/3.0

    Protocol inet

      Source class                             Packets                Bytes

                      scu-class-a                    0                    0

user@scu> show interfaces source-class scu-class-b so-0/0/1.0

    Protocol inet

      Source class                             Packets                Bytes

                      scu-class-b                    0                    0

Step Two:

Ping from the Edge Routers

user@routerB> ping 10.255.192.10 source 10.255.165.226 rapid 10000

user@routerA> ping 10.255.165.226 source 10.255.192.10 rapid 10000

Step Three:

Verify the Counters

user@scu> show interfaces source-class scu-class-a so-0/0/3.0

    Protocol inet

      Source class                             Packets                Bytes

                      scu-class-a                20000              1680000

user@scu> show interfaces source-class scu-class-a so-0/0/1.0

    Protocol inet

      Source class                             Packets                Bytes

                      scu-class-b                20000              1680000

user@scu> show interfaces so-0/0/3.0 statistics

  Logical interface so-0/0/3.0 (Index 6) (SNMP ifIndex 113)

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

    Protocol inet, MTU: 4470

      Source class                             Packets                Bytes

                      scu-class-a                20000              1680000

                      scu-class-b                    0                    0

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.255.10/24, Local: 10.255.10.3

user@scu> show interfaces so-0/0/1.0 statistics

  Logical interface so-0/0/1.0 (Index 4) (SNMP ifIndex 119)

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

    Protocol inet, MTU: 4470

      Source class                             Packets                Bytes

                      scu-class-a                    0                    0

                      scu-class-b                20000              1680000

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.255.50/24, Local: 10.255.50.1

user@scu> show route extensive 10.255.192.0

inet.0: 26 destinations, 28 routes (25 active, 0 holddown, 1 hidden)

10.255.192.0/18 (1 entry, 1 announced)

TSI:

KRT in-kernel 10.255.192.0/18 -> {so-0/0/1.0}

Source class: scu-class-a

        *OSPF   Preference: 150

                Next hop: via so-0/0/1.0, selected

                State: <Active Int Ext>

                Age: 2:49:31     Metric: 0     Tag: 0

                Task: OSPF

                Announcement bits (1): 0-KRT

                AS path: I

user@scu> show route extensive 10.255.165.0

inet.0: 26 destinations, 28 routes (25 active, 0 holddown, 1 hidden)

10.255.165.0/20 (1 entry, 1 announced)

TSI:

KRT in-kernel 10.255.165.0/20 -> {so-0/0/3.0}

Source class: scu-class-b

        *OSPF   Preference: 150

                Next hop: via so-0/0/3.0, selected

                State: <Active Int Ext>

                Age: 2:49:31     Metric: 0     Tag: 0

                Task: OSPF

                Announcement bits (1): 0-KRT

                AS path: I

user@scu> show interfaces so-0/0/1 detail

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

  Interface index: 12, SNMP ifIndex: 17, Generation: 11

  Link-level type: PPP, MTU: 4474, Clocking: Internal, SONET mode, Speed: OC3,

  Loopback: None, FCS: 16, Payload scrambler: Enabled

  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 : 46 (last seen 00:00:01 ago)

    Output: 45 (last sent 00:00:00 ago)

  LCP state: Opened

  NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:

  Not-configured

  CHAP state: Not-configured

  Last flapped   : 2002-04-19 11:49:22 PDT (03:10:09 ago)

  Statistics last cleared: 2002-04-19 14:52:04 PDT (00:07:27 ago)

  Traffic statistics:

   Input  bytes  :              1689276                   40 bps

   Output bytes  :              1689747                   48 bps

   Input  packets:                20197                    0 pps

   Output packets:                20200                    0 pps

  Queue counters:       Queued packets  Transmitted packets      Dropped packets

    0 best-effort                20053                20053                    0

    1 expedited-fo                   0                    0                    0

    2 assured-forw                   0                    0                    0

    3 network-cont                 146                  146                    0

  SONET alarms   : None

  SONET defects  : None

  Logical interface so-0/0/1.0 (Index 4) (SNMP ifIndex 119) (Generation 3)

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

    Protocol inet, MTU: 4470

      Flags: SCU-in, SCU-out

    Generation: 6 Route table: 0

      Source class                             Packets                Bytes

                      scu-class-a                    0                    0

                      scu-class-b                20000              1680000

      Filters: Input: icmp-so-0/0/1.0-i, Output: icmp-so-0/0/1.0-o

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.255.50/24, Local: 10.255.50.1, Broadcast: Unspecified,

        Generation: 8

user@scu> show interfaces so-0/0/1 extensive

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

  Interface index: 12, SNMP ifIndex: 17, Generation: 11

  Link-level type: PPP, MTU: 4474, Clocking: Internal, SONET mode, Speed: OC3,

  Loopback: None, FCS: 16, Payload scrambler: Enabled

  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 : 51 (last seen 00:00:04 ago)

    Output: 50 (last sent 00:00:05 ago)

  LCP state: Opened

  NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:

  Not-configured

  CHAP state: Not-configured

  Last flapped   : 2002-04-19 11:49:22 PDT (03:11:05 ago)

  Statistics last cleared: 2002-04-19 14:52:04 PDT (00:08:23 ago)

  Traffic statistics:

   Input  bytes  :              1689884                  264 bps

   Output bytes  :              1690388                  280 bps

   Input  packets:                20215                    0 pps

   Output packets:                20217                    0 pps

  Input errors:

    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0,

    Bucket drops: 0, Policed discards: 0, L3 incompletes: 0,

    L2 channel errors: 0, L2 mismatch timeouts: 0, HS link CRC errors: 0,

    HS link FIFO overflows: 0

  Output errors:

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

    HS link FIFO underflows: 0

  Queue counters:       Queued packets  Transmitted packets      Dropped packets

    0 best-effort                20053                20053                    0

    1 expedited-fo                   0                    0                    0

    2 assured-forw                   0                    0                    0

    3 network-cont                 164                  164                    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      : 0xcf, C2(cmp) : 0xcf, 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      : 0xcf, F2      : 0x00, Z3      : 0x00

    Z4      : 0x00, V5      : 0x00

  Received path trace: e so-0/0/1

    65 20 73 6f 2d 30 2f 30 2f 31 00 00 00 00 00 00   e so-0/0/1......

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 0d 0a   ................

  Transmitted path trace: scu so-0/0/1

    67 68 62 20 73 6f 2d 30 2f 30 2f 31 00 00 00 00   scu so-0/0/1....

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................

  HDLC configuration:

    Policing bucket: Disabled

    Shaping bucket : Disabled

    Giant threshold: 4484, Runt threshold: 3

  Packet Forwarding Engine configuration:

    Destination slot: 0, 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 so-0/0/1.0 (Index 4) (SNMP ifIndex 119) (Generation 3)

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

    Protocol inet, MTU: 4470

      Flags: SCU-in, SCU-out

    Generation: 6 Route table: 0

      Source class                             Packets                Bytes

                      scu-class-a                    0                    0

                      scu-class-b                20000              1680000

      Filters: Input: icmp-so-0/0/1.0-i, Output: icmp-so-0/0/1.0-o

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.255.50/24, Local: 10.255.50.1, Broadcast: Unspecified,

        Generation: 8

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