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Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter 5 SONET Topologies
Unidirectional Path Switched Rings
Figure 5-25 Connecting fiber to a four-node UPSR
Procedure: Configure the UPSR DCC Terminations
Step 1 Log into the first node that will be in the UPSR.
Step 2 Click the Provisioning > Sonet DCC tabs.
Step 3 In the SDCC Terminations section, click Create.
Step 4 On the Create SDCC Terminations dialog box, press Control and click the two slots/ports that will serve
as the UPSR ports at the node. For example, Slot 6 (OC-48)/Port 1 and Slot 12 (OC-48)/Port 1.
Note The ONS 15454 uses the SONET Section layer DCC (SDCC) for data communications. It
does not use the Line DCCs. Line DCCs can be used to tunnel DCCs from third party
equipment across ONS 15454 networks. For procedures, see the “Creating DCC Tunnels”
section on page 6-21.
Step 5 Click OK.
The slots/ports display in the SDCC Terminations section.
Step 6 Complete Steps 2 – 5 at each node that will be in the UPSR.
After configuring the SONET DCC, set the timing for the node. For procedures, see the “Setting Up ONS
15454 Timing” section on page 3-12. After configuring the timing, enable the UPSR ports as described
in the following procedure.
68120
Node 1
Slot 5
Tx
Rx
Slot 12
Tx
Rx
Node 3
Slot 5
Tx
Rx
Slot 12
Tx
Rx
Node 2
Slot 5
Tx
Rx
Slot 12
Tx
Rx
Node 4
Slot 5
Tx
Rx
Slot 12
Tx
Rx