Cisco Systems 15454M6DC Manuel D’Utilisation

5-40

Cisco ONS 15454 Installation and Operations Guide

78-13453-01

Chapter 5 SONET Topologies

Subtending Rings

Procedure: Subtend a BLSR from a BLSR

This procedure requires an established BLSR and one BLSR node with OC-N cards and fibers to carry
the BLSR. The procedure also assumes you know how to set up a BLSR. For BLSR setup procedures,
see the

“Setting Up BLSRs” section on page 5-10

Step 1

In the node that will subtend the BLSR (Node 4 in

Figure 5-30

), install the OC-N cards that will serve

as the BLSR trunk cards (Node 4, Slots 6 and 13).

Step 2

Attach fibers from these cards to the BLSR trunk cards on the BLSR nodes. In

Figure 5-30

, Node 4/Slot

6 connects to Node 7/Slot 13, and Slot 13 connects to Node 5/Slot 6.

Step 3

From the node view, click the Provisioning > Sonet DCC tabs.

Step 4

Click Create.

Step 5

In the Create SDCC Terminations dialog box, click the slot and port that will carry the BLSR.

Step 6

Click OK.

Step 7

The selected slots/ports are displayed in the SDCC Terminations section.

Step 8

Put the ports that you will use for the BLSR in service:

In the node view, double-click the BLSR trunk card.

Select the Provisioning > Line tabs. Under Status, choose In Service.

Click Apply.

Repeat steps a – c for the second BLSR trunk card.

Step 9

To configure the BLSR, use the

“Provision the BLSR” procedure on page 5-14

. The subtending BLSR

must have a ring ID that differs from the ring ID of the first BLSR.

Step 10

Follow Steps 1 – 8 for the other nodes that will be in the subtending BLSR.

Step 11

Display the network view to see the subtending ring.

Figure 5-31

shows an example of two subtending BLSRs.

Figure 5-31 Viewing subtending BLSRs on the network map

Figure 5-32

shows the Ring subtab for Node 5, which is the node that carries the two rings.