Example: Configuring a Channelized Interface to Drop and Insert Time Slots

Requirements

No special configuration beyond device initialization is required before configuring this feature.

Overview

This example integrates voice and data channels on a single T1 or E1 link. It also removes the DS0 time slots of one T1 or E1 port and replace them by inserting the time slots of another T1 or E1 interface.

Configuration

CLI Quick Configuration

To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, and then copy and paste the commands into the CLI at the [edit] hierarchy level.

Step-by-Step Procedure

1. Create the interface.
   [edit interfaces ct1-3/0/0]user@host# edit interfaces ct1-3/0/0
2. Configure the clock source and partition on the interface.
   [edit]user@host# set clocking externaluser@host# set partition 1 timeslots 1-10user@host# set partition 1 interface-type ds

   Note: While configuring the drop-and-insert feature, you must ensure that both ports on the channelized T1/E1 PIM run on the same clock.

3. Create another interface.
   [edit]user@host# edit interfaces ct1-3/0/1
4. Configure the clock source and partition on the interface.
   [edit interfaces ct1-3/0/1]user@host# set clocking external interface ct1-3/0/0user@host# set partition 1 timeslots 1-10user@host# set partition 1 interface-type ds

   Note: While configuring the drop-and-insert feature, you must ensure that both ports on the channelized T1/E1 PIM run on the same clock.

5. Create additional interfaces and configure the drop-and-insert feature on those interfaces.
   [edit interfaces ds-3/0/0:1]user@host# edit interfaces ds-3/0/0:1user@host# set interfaces ds-3/0/0:1 data-input interface ds-3/0/1:1

   Note: Both interfaces configured for the drop-and-insert feature must exist on the same PIM. For example, you can configure ds-3/0/0:1 as the data input interface for ds-3/0/1:1, but not for ds-4/0/0:1.

Results

From configuration mode, confirm your configuration by entering the show interfaces command. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it.

For brevity, this show interfaces command output includes only the configuration that is relevant to this example. Any other configuration on the system has been replaced with ellipses (...).

If you are done configuring the device, enter commit from configuration mode.

Verification

Confirm that the configuration is working properly.

• Verifying Channelized Interfaces

Verifying Channelized Interfaces

Purpose

Verify that your configurations for the channelized interfaces are correct.

Action

From operational mode, enter the show interfaces ct1-3/0/1 command.

Physical interface: ct1-3/0/1, Enabled, Physical link is Up
  Interface index: 151, SNMP ifIndex: 28
  Link-level type: Controller, Clocking: Internal, Speed: E1, Loopback: None,
  Parent: ct1-3/0/1 Interface index 151
  Framing: G704, Parent: None
  Device flags : Present Running
  Interface flags: Point-To-Point SNMP-Traps Internal: 0x4000
  Link flags : None
  CoS queues : 8 supported, 8 maximum usable queues
  Last flapped : 2006-10-05 21:11:48 PDT (06:45:04 ago)
  DS1   alarms   : None
  DS1   defects  : None
	Line encoding: HDB3

  

The output shows a summary of information about the physical parent interface—a channelized T1 interface in this example.