Cisco ONS 15327, Пользовательская документация

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5-13
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 5 SONET Topologies
Bidirectional Line Switched Rings
Step 5
Log into the node that will connect to the new node through its east port (Node 4 in the Figure 5-11
example).
Step 6 Switch protection on the east port:
a.
Click the Maintenance > Ring tabs.
b.
From the East Switch list, choose FORCE RING . Click Apply .
Performing a FORCE switch generates a force switch request on an equipment (FORCE-REQ) alarm.
This is normal.
Caution Traffic is unprotected during a protection switch.
Step 7
Log into the node that will connect to the new node through its west port (Node 1 in the Figure 5-11
example).
Step 8
Switch protection on the west port:
a. Click the Maintenance > Ring tabs.
b.
From the West Switch list, choose FORCE RING . Click Apply .
Step 9 Following the diagram that you created in Step 1, remove the fiber connections from the two nodes that
will connect directly to the new node.
a.
Remove the east fiber from the node that will connect to the west port of the new node. In the
Figure 5-11 example, this is Node 4/Slot 2.
b.
Remove the west fiber from the node that will connect to the east port of the new node. In the
Figure 5-11 example, this is Node 1/Slot 1.
Step 10
Replace the removed fibers with fibers that are connected to the new node. Connect the west port to the
east port and the east port to the west port.
Figure 5-12 shows the BLSR in the Figure 5-11 example after
the node is connected.