18-83
Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 18 DLPs D100 to D199
DLP- D196 Delete an MS-SPRing from a Single Node
Step 2 Observe the Timing Mode field to see the type of timing (Line, External, Mixed) that has been set for
that node.
Step 3 Scroll down to the Reference List and observe the NE Reference fields to see the timing references
provisioned for that node.
Step 4 If the removed node was the only building integrated timing supply (BITS) timing source, perform the
following:
a. Contact your synchronization coordinator or appropriate personnel before continuing with this
procedure.
b. Look for another node on the ring that can be used as a BITS source and set that node’s Timing Mode
to External. Choose that node as the primary timing source for all other nodes in the ring. See the
“DLP-D157 Change the Node Timing Source” task on page 18-48.
c. If no node in the reduced ring can be used as a BITS source, choose one node to be your internal
timing source. Set that node’s Timing Mode to External, set the BITS-1 and BITS-2 BITS In State
to OOS, and set the NE Reference to Internal. Then, choose line timing for all other nodes in the
ring. This forces the first node to be their primary timing source. (See the “DLP-D157 Change the
Node Timing Source” task on page 18-48.)
Note This type of timing conforms to SETS requirements and is not considered optimal.
Step 5 If the removed node was not the only BITS timing source, provision the adjacent nodes to line timing
using SDH links (east and west) as timing sources, traceable to the node with external BITS timing. See
the “NTP-D28 Set Up Timing” procedure on page 4-9.
Step 6 Return to your originating procedure (NTP).
DLP-D196 Delete an MS-SPRing from a Single Node
Step 1 In node view, display the node that was removed from the MS-SPRing:
• If the node that was removed is connected to the same LAN as your computer, from the File menu,
choose Add Node, then enter the node name or IP address.
• If the node that was removed is not connected to the same LAN as your computer, you must connect
to the node using a direct connection. See Chapter 3, “Connect the PC and Log into the GUI,” for
procedures.
Step 2 From node view, click the Provisioning > MS-SPRing tabs.
Step 3 Highlight the ring and click Delete.
Purpose This task deletes an MS-SPRing from a node after you remove the node
from an MS-SPRing.
Tools/Equipment None
Prerequisite Procedures DLP-D60 Log into CTC, page 17-49
Required/As Needed As needed
Onsite/Remote Onsite or remote
Security Level Provisioning or higher
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