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Configuring SONET Paths

You can configure SONET paths on cOC12 line modules. You can create SONET paths or delete SONET paths from a line interface using the Configure Sonet Paths dialog box.

When a cOC12 line interface is in SDH mode, the interface can contain both OC3- and OC1-speed SONET paths, which enables you to create multiple SONET paths of varying speeds.

Each check mark indicates a SONET path that is selected, or one that already exists with no stacking other than DS3 channels on it. When a SONET path is selected, any SONET path that is directly above or below it is deselected. These SONET paths overlap and cannot exist simultaneously. SONET paths with a DS3 or DS1 interface are labeled DS3 and DS1, respectively, and you cannot deselect them. SONET paths that overlap with these SONET paths appear dimmed, and you cannot select them.

If you configure the cOC12 line interface with Synchronous Mode set to SONET, OC3-speed SONET paths are not allowed and are disabled in the Configure Sonet Paths dialog box.

For detailed information about SONET paths, see JUNOSe Physical Layer Configuration Guide, Chapter 5, Configuring OCx/STMx Interfaces.

To configure a SONET path:

  1. On a cOC12 line module, click a line interface.
  2. Right-click and select Configure Sonet Paths.

The Configure Sonet Paths dialog box appears.

  1. Select the desired paths by clicking the necessary box(es).

    NOTE: If a line interface is already configured with other SONET paths and the paths have DS3 or DS1 interfaces on them, you cannot create or modify the paths until you remove the DS3/DS1 interfaces.

  2. Click OK.

The SONET path hierarchy appears in the Instance Explorer.

Mapping and Removing DS1 Interfaces on an OC1 SONET Path

You can map a DS1 interface on an OC1 SONET path if there are no other objects on the path.

To map DS1 interfaces:

  1. Select an OC1 SONET path.
  2. Right-click, and select Map to DS1.

The DS1 Interfaces hierarchy appears in the Instance Explorer.

To remove the mapping:

  1. Select the OC1 SONET path that contains the DS1 interfaces.
  2. Right-click, and select Remove DS1s.

The items are deleted.

NOTE: For information about configuring DS1 interfaces, see Configuring a DS1 Interface in Chapter 15, Configuring T3/E3 and T1/E1 Modules.

DS3 Channels

DS3 channels are located only on OC3-speed SONET paths that are created on cOC3/cOC12 line interfaces set to SDH mode. Each OC3 SONET path has three DS3 channels numbered 1-3. This number is the path payload number of any DS1 interface that is configured on top of the DS3 channel.

For example, the first DS1 interface that is configured on top of the DS3 channel is numbered 1/1/1, 1/1/2, 1/1/3, and 1/1/4. The second DS1 interface is numbered 1/2/1, 1/2/2, 1/2/3, and 1/2/4, and so forth.

To learn how to map and remove DS1 interfaces on DS3 channels, see Mapping and Removing DS1 Interfaces on an OC1 SONET Path.

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