Cisco ONS 15310-MA SDH, Руководство по процедурам

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Cisco ONS 15310-MA SDH Procedure Guide, Release 9.1 and Release 9.2
78-19416-01
Chapter 17 DLPs H100 to H199
Note The BITS Facilities section sets the parameters for your BITS1 timing references. Many of these
settings are determined by the timing source manufacturer. If equipment is timed through BITS
Out, you can set timing parameters to meet the requirements of the equipment.
•
In/Out State
•
Coding
• Framing
•
Sync Messaging
• AIS Threshold
•
Admin SSM
•
LBO
Step 5
Click Apply .
Step 6 Return to your originating procedure (NTP).
DLP-H140 Verify Timing in a Reduced Ring
Step 1 In node view, click the Provisioning > Timing > General tabs.
Step 2
Identify the type of timing (Line, External, Mixed) in the Timing Mode field.
Step 3 Scroll down to the Reference Lists and observe the NE Reference fields to see the timing references
provisioned for that node.
Step 4
If the removed node was the only BITS timing source, perform the following:
a.
Look for another node on the ring that can be used as a BITS source and set the Timing Mode for
that node to
External . Choose that node as the primary timing source for all other nodes in the ring.
See the “DLP-H139 Change the Node Timing Source” task on page 17-42 .
b.
If no node in the reduced ring can be used as a BITS source, choose one node to be your internal
timing source. Set the Timing Mode for that node to
External , set the BITS 1 and 2 State field to
OOS , and set the NE Reference to Internal Clock . Then, choose line timing for all other nodes in
the ring. This forces the first node to be the primary timing source. See the “DLP-H139 Change the
Node Timing Source” task on page 17-42 .
Note
Internal timing conforms to Stratum 3 requirements and is not considered optimal.
Purpose Use this task to verify timing in the ring where you removed a node.
Tools/Equipment None
Prerequisite Procedures NTP-H98 Remove a Path Protection Node, page 13-4
Required/As Needed As needed
Onsite/Remote Onsite or remote
Security Level Provisioning or higher