14-6
Cisco ONS 15454 Procedure Guide, R5.0
December 2004
Chapter 14 Add and Remove Nodes
NTP-A240 Remove a BLSR Node
Note If the circuits take more than a minute to appear, log out of CTC, then log back in.
Step 28 In network view, right-click the new node and choose Update Circuits With The New Node from the
shortcut menu. Verify that the number of updated circuits in the dialog box is correct.
Step 29 If incomplete circuits are still present, refer to the Cisco ONS 15454 Troubleshooting Guide.
Step 30 Click the History tab. Verify that BLSR_RESYNC conditions appear for every node in the BLSR.
Step 31 Complete the “DLP-A194 Clear a BLSR Force Ring Switch” task on page 18-66 to remove the ring
switch from the east and west BLSR lines.
Step 32 According to local site practice, complete the “NTP-A175 Two-Fiber BLSR Acceptance Test” procedure
on page 5-13 or the “NTP-A176 Four-Fiber BLSR Acceptance Test” procedure on page 5-15.
Stop. You have completed this procedure.
NTP-A240 Remove a BLSR Node
Caution The following procedure minimizes traffic outages during node removals. You will delete all circuits that
originate and terminate on the node that will be removed. In addition, you will verify that circuits passing
through the node do not enter and exit the node on different STSs and/or VTs. If they do, you will delete
and recreate the circuits, and traffic will be lost during this time.
Step 1 According to local site practice, complete the “NTP-A108 Back Up the Database” procedure on
page 15-4 for all the nodes in the ring.
Step 2 Complete the “DLP-A60 Log into CTC” task on page 17-66 at the node that you are going to remove
from the BLSR.
Step 3 Complete the “DLP-A195 Verify Timing in a Reduced Ring” task on page 18-67.
Note If you remove a node that is the only building integrated timing supply (BITS) for the ring, you
also remove the only source of synchronization for all the nodes in that ring. Circuits that leave
the ring to connect to other networks synchronized to a Stratum 1 clock will experience a high
level of pointer adjustments, which might adversely affect traffic performance.
Step 4 Create a diagram of the BLSR where you will remove the node. You can draw the BLSR manually, or
print it from CTC by performing the following steps:
a. From the View menu, choose Go to Network View.
Purpose This procedure removes a BLSR ring or multiple BLSR rings from a node.
Tools/Equipment None
Prerequisite Procedures NTP-A126 Create a BLSR, page 5-12
Required/As Needed As needed
Onsite/Remote Onsite
Security Level Provisioning or higher
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