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CLI-based Configuration Guide - Interface Management

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the basic concepts, configuration procedures, and configuration examples of the interfaces supported by the device.
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Configuring a CE1/PRI Interface (CE1 Mode)

Configuring a CE1/PRI Interface (CE1 Mode)

To use multiple low-rate (128 kbit/s or 256 kbit/s) E1 channels to transmit different services, configure a CE1/PRI interface to work in CE1 mode.

Pre-configuration Tasks

Before configuring a CE1/PRI interface, complete the following task:

  • Install a 1E1T1-M/2E1T1-M/4E1T1-M/8E1T1-M interface card on the router and ensuring that it is registered successfully.

Context

All parameters except the clock mode of CE1/PRI interfaces on both ends must be the same. Otherwise, errors may occur during communication.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Configure the 1E1T1-M/2E1T1-M interface card to work in CE1/PRI mode.

    1. Run display device

      Information about the 1E1T1-M/2E1T1-M interface card is displayed. You can check the slot ID of the interface card, whether the interface card is installed in the slot, and whether it is working properly.

    2. Run display workmode { slot slot-id | all }

      The working mode of the 1E1T1-M/2E1T1-M interface card is displayed.

    3. Run set workmode slot slot-id e1t1 e1-data

      The 1E1T1-M/2E1T1-M interface card is configured to work in CE1/PRI mode.

      By default, a 1E1T1-M/2E1T1-M interface card works in CE1/PRI mode (e1-data).

      After completing this step, reset the 1E1T1-M/2E1T1-M interface card and wait for a while for the configuration to take effect.

      NOTE:

      The 4E1T1-M/8E1T1-M interface card only works in CE1/PRI mode (e1-data) and does not support working mode switching.

  3. Run controller e1 interface-number

    The specified CE1/PRI interface view is displayed.

  4. Run using ce1

    The CE1/PRI interface is configured to work in CE1/PRI mode.

    By default, a CE1/PRI interface works in CE1/PRI mode.

  5. (Optional) Cancel the PRI set bundling.

    Perform this step if the CE1/PRI interface needs to switch from the PRI mode to the CE1 mode.

    1. Enter the view of the serial interface generated by the PRI interface from the interface view, and then run the shutdown command to shut down the serial interface.
    2. Enter the CE1/PRI interface view, and then run the undo pri-set command to cancel the PRI set bundling.

  6. Run channel-set set-number timeslot-list list

    Timeslots of the CE1/PRI interface are bundled to form a channel set.

    After you perform this step, the system automatically creates a serial interface. The number format of a serial interface is "serial interface-number:set-number". interface-number specifies the number of a CE1/PRI interface, and set-number specifies the number of a channel set. This interface has the same logical features as a synchronous serial interface, and you can configure other parameters on the interface, including the IP address, link layer protocol (such as PPP and FR), and NAT.

  7. Run line-termination { 75-ohm | 120-ohm }

    The cable type applied to the CE1/PRI interface is specified.

    By default, a CE1/PRI interface connects to a 120 ohm balanced cable (twisted pair).

    If the type of the cable connected to a CE1/PRI interface changes, use this command to change the cable type.

  8. Configure other parameters on the CE1/PRI interface.

    • Run description text

      The interface description is configured.

    • Run clock { master | slave | system }

      The clock mode is set.

      By default, a CE1/PRI interface works in slave clock mode and uses line clock signals.

      When a CE1/PRI interface functions as a Data Circuit-terminating Equipment (DCE) interface, it must work in master clock mode and provide clock signals for a Data Terminal Equipment (DTE) interface. When a CE1/PRI interface functions as a DTE interface, it must work in slave clock mode and obtain clock signals from a DCE interface.

      When the MPU on the router obtains the clock with high accuracy from the upstream device and the router needs to synchronize the clock to downstream device, the interface on the router must be configured to work in system clock mode. Moreover, the interface on the downstream device must be configured to work in slave clock mode.

    • Run frame-format { crc4 | no-crc4 }

      The frame format is set.

      By default, a CE1/PRI interface uses non-CRC4 as the frame format.

    • Run idlecode { 7e | ff }

      The line idle code is set.

      By default, a CE1/PRI interface uses the line idle code 0x7e.

    • Run itf { number number | type { 7e | ff } }

      The interframe filling tag and the number of interframe filling tags are set.

      By default, a CE1/PRI interface uses the interframe filling tag 0x7e and four interframe filling tags.

    • Run data-coding { inverted | normal }

      Data inversion is configured.

      By default, a CE1/PRI interface does not invert data.

    • Run detect-rai

      RAI detection is configured.

      By default, RAI detection is enabled on a CE1/PRI interface.

Verifying the Configuration

  • Run the display controller e1 interface-number command to check the status and parameters of the specified CE1/PRI interface.
  • Run the display interface serial interface-number command to check the status and packet statistics on the specified serial interface.
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Updated: 2019-03-06

Document ID: EDOC1100069331

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