5-14
Cisco ONS 15454 Installation and Operations Guide
78-13453-01
Chapter5 SONET Topologies
Bidirectional Line Switched Rings
Figure5-13 Enabling an optical port
Step 5 Repeat Steps 2 – 4 for the other optical card configured as a DCC termination.
Step 6 (Four-fiber BLSR only) Repeat Steps 2 – 4 for each protect card.
Step 7 Repeat Steps 2 – 5 at each node that will be in the BLSR.
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 you configure the timing you can provision the BLSR.
Procedure: Provision the BLSR
Step 1 Log into one BLSR node.
Step 2 Select the Provisioning > Ring tabs.
Step 3 Click Create.
Step 4 On the Create BLSR dialog box (Figure 5-14), set the BLSR properties:
•Ring Type—select the BLSR ring type, either two-fiber or four-fiber.
•Ring ID—Assign a ring ID (a number between 0 and 9999). Nodes in the same BLSR must have the
same Ring ID.
•Node ID—Assign a Node ID. The Node ID identifies the node to the BLSR. Nodes in the same
BLSR must have unique Node IDs.
•Reversion time—Set the amount of time that will pass before the traffic reverts to the original
working path. The default is 5 minutes. All nodes in a BLSR ring should have the same reversion
time setting, particularly if “never” (i.e., non-revertive) is selected.
•West Port—Assign the west BLSR port for the node from the pull-down menu. (In Figure 5-11, this
is Slot 5.)