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Example: Complex Configuration for a Channelized OC12 IQ Interface

 
Figure 1: Complex Configuration for a Channelized OC12 IQ Interface
Complex Configuration for a Channelized
OC12 IQ Interface

Table 1: Complex Channelization for a Channelized OC12 IQ Interface

Partition

Slices

Interface Type

Interface Level 2

Interface Level 3

1

1–3

OC3

2

4

Channelized OC1 converted to T3

3

5

Channelized OC1 converted to channelized T3

28 T1s

4

6

Channelized OC1 converted to channelized T3

26 T1s

2 CT1s

24 DS0s

5 DS0s and 1 channel group of 19 DS0s

5

7

Channelized OC1 converted to T3

6

8

Channelized OC1

28 T1s

7

9

Channelized OC1

26 T1s

2 CT1s

24 DS0s

5 DS0s and 1 channel group of 19 DS0s

8

10–12

OC3

Figure 1 and Table 1 show a complex channelization structure that you might encounter if you use the full capabilities of a channelized OC12 IQ interface. Partitions 1 and 8 create an OC3 interface, while Partitions 2 and 5 create T3 interfaces out of channelized OC1 interfaces. Partition 3 (channelized OC1 converted to channelized T3) and Partition 6 (channelized OC1) are channelized interfaces that each subdivide into 28 T1 interfaces. Finally, Partition 4 (channelized OC1 converted to channelized T3) and Partition 7 (channelized OC1) are channelized interfaces that each split into 2 channelized T1 interfaces and 26 T1 interfaces. The first channelized T1 splits into 24 DS0 time slots, whereas the second channelized T1 subdivides into 5 DS0 channels and 1 channel group comprised of 19 DS0 channels.

This example shows two NxDS0 mapping methods. Partition 4 uses M13 mapping for North American T-carrier equipment and Partition 7 uses VT mapping for SONET/SDH equipment.

This example also assumes corresponding interfaces. For example, for every sublevel T1 interface you configure on Router A, assume you have configured a matching sublevel or physical T1 interface on a neighboring router.

Router A

Verifying Your Work

To verify correct operation of a channelized OC12 IQ interface configured for complex channelization, use the following commands:

  • show interfaces controller

  • show interfaces

  • show interfaces interval (for OC12, channelized OC12, OC3, T3, channelized T3, T1, and channelized T1 channels)

To view the names of the resulting interfaces and channelized interfaces configured on a channelized OC12 IQ interface, use the show interfaces controller command:

user@RouterA> show interfaces controller

To verify that your channelized IQ interfaces are working as expected, use the show interfaces command. Use the show interfaces controller command to find the name of the channelized interface you want to view; then include this channelized name (for example, ct3-4/2/0:4) as an option with the show interfaces command.

The next sections provide sample show interfaces output for each of the major interface types configured in this example:

Channelized OC12

user@RouterA> show interfaces extensive coc12-4/2/0

SONET OC3

user@RouterA> show interfaces extensive so-4/2/0:8

T3

user@RouterA> show interfaces extensive t3-4/2/0:2

Channelized T3

user@RouterA> show interfaces extensive ct3-4/2/0:4

Channelized OC1

user@RouterA> show interfaces extensive coc1-4/2/0:7

Channelized T1

user@RouterA> show interfaces extensive ct1-4/2/0:4:1

T1

user@RouterA> show interfaces extensive t1-4/2/0:7:3

DS0

user@RouterA> show interfaces extensive ds-4/2/0:4:1:1