Configure Multilevel Channels on a Channelized IQ Interface

You can subdivide a channelized interface and then split these subchannelized interfaces into end channels. Creating small end channels might require multiple levels of channelization.

To configure a subdivided channelized interface within a partition of a channelized IQ interface, include the partition statement at the [edit interfaces cxx-fpc/pic/port] hierarchy level. On a channelized OC-12 IQ interface, use the oc-slice option to create slice sizes corresponding to the desired bandwidth. On all channelized IQ interfaces, use the interface-type option to set the channelized interface type (such as channelized OC-1).

On a channelized OC-12 IQ interface, you can convert a subdivided channelized OC-1 interface into a T3 or channelized T3 interface. To configure, include the no-partition statement at the [edit interfaces coc1-fpc/pic/port:channel] hierarchy level and set the interface-type to ct3. A ct3-fpc/pic/port:channel interface is the result. Such a conversion is known as M13 with C-bit parity mapping. T1 and DS-0 channels created directly from a coc-1 interface use VT mapping.

To further split your channelized interfaces into even smaller channelized interfaces, use the partition and interface-type statements at the [edit interfaces cxx-fpc/pic/port:channel] hierarchy level. You can create channelized OC-1, channelized T3, and channelized T1 interfaces, depending on the PIC type.

Finally, you configure these "channels of channels" as end channels. To configure end channels on a segmented channelized IQ interface, include the partition statement at the [edit interfaces cxx-fpc/pic/port:channel] hierarchy level. The number of channels in the hierarchy depends on how finely you partition the channelized IQ interface. Use the timeslots option to select NxDS-0 level channels and the interface-type option to set the interface type (such as T1 or NxDS-0). Once the resulting channels have been established, you can configure them as regular interfaces.

[edit]

interfaces {

    coc12-0/0/0 {

        partition 2 oc-slice 4 interface-type coc1;                                                                #Creates channelized OC-1 interfaces:

        partition 3 oc-slice 5 interface-type coc1;                                                                # coc1-0/0/0:2, :3, and :4

        partition 4 oc-slice 6 interface-type coc1;

    }

    coc1-0/0/0:2 {

        no-partition interface-type t3;     #Converts a channelized OC-1 to a T3 interface:

    }                                                        # t3-0/0/0:2

    t3-0/0/0:2 {

        encapsulation ppp;

        unit 0 {

            family inet {

                address 10.255.0.6/30;

        }

    }

    coc1-0/0/0:3 {

        no-partition interface-type ct3;                                                            # Creates a channelized T3 interface: ct3-0/0/0:3

    }

    ct3-0/0/0:3 {

        partition 1-28 interface-type t1;                                                                    # Creates 28 T1 interfaces: t1-0/0/0:3:1 - 28

    }

    coc1-0/0/0:4 {

        partition 1 interface-type ct1;                                                        # Creates a channelized T1 interface: t1-0/0/0:4:1

    }

    ct1-0/0/0:4:1 {

        partition 1 timeslots 1 interface-type ds;                                                                     # Creates 1xDS-0 interface: ds-0/0/0:4:1:1

        ...

        partition 24 timeslots 24 interface-type ds;                                                                         # Creates 1xDS-0 interface:

    }                                                                            # ds-0/0/0:4:1:24

    t1-0/0/0:3:1 {

        encapsulation ppp;

            unit 0 {

                family inet {

                    address 10.255.0.26/30;

                }

            }

        }

    ...

    }

    ds-0/0/0:4:1:24 {

        encapsulation ppp;

            unit 0 {

                family inet {

                    address 10.255.0.214/30;

                }

            }

        }

    }

}

A useful operational command you can use with all channelized IQ interfaces is the show interfaces interval command. It shows a summary of alarms, status indicators, and performance monitoring statistics in 15-minute increments over the past 24 hours. More detail on each of these indicators can be seen with the show interfaces extensive command:

user@router> show interfaces interval cstm1-0/0/0

Physical interface: cstm1-0/0/0, SNMP ifIndex: 32

  17:23-current:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  17:08-17:23:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  16:53-17:08:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  16:38-16:53:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  16:23-16:38:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  16:08-16:23:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  15:53-16:08:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  15:38-15:53:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  15:23-15:38:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  15:08-15:23:

    RS-ES: 33, RS-SES: 33, RS-SEFS: 32, MS-ES: 32, MS-SES: 32, MS-UAS: 4

  14:53-15:08:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  14:38-14:53:      

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  14:23-14:38:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  14:08-14:23:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  13:53-14:08:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  13:38-13:53:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  13:23-13:38:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  13:08-13:23:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  12:53-13:08:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  12:38-12:53:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  12:23-12:38:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  12:08-12:23:

    RS-ES: 0, RS-SES: 0, RS-SEFS: 0, MS-ES: 0, MS-SES: 0, MS-UAS: 0

  11:53-12:08:

    RS-ES: 11, RS-SES: 11, RS-SEFS: 11, MS-ES: 11, MS-SES: 11, MS-UAS: 1

  Interval Total:

    RS-ES: 44, RS-SES: 44, RS-SEFS: 43, MS-ES: 43, MS-SES: 43, MS-UAS: 5