Cisco Systems 78-16845-01 manual Setting Up External or Line Timing for CTC-Based Sonet NEs

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Chapter 3 Building the Network

3.10.1 Synchronization Settings for the ONS 15310, ONS 15327, ONS 15454 SONET, and ONS 15600 SONET

Table 3-19	SSM Generation 2 Message Set

Message	Quality	Description

PRS	1	Primary reference source—Stratum 1

STU	2	Sync traceability unknown

ST2	3	Stratum 2

TNC	4	Transit node clock

ST3E	5	Stratum 3E

ST3	6	Stratum 3

SMC	7	SONET minimum clock

ST4	8	Stratum 4

DUS	9	Do not use for timing synchronization

RES	—	Reserved; quality level set by user

Note Alarms relating to PM collection indicate that the load on the system is high. Reduce the load on the system before proceeding.

3.10.1.1 Setting Up External or Line Timing for CTC-Based SONET NEs

Step 1 Select an ONS 15310, ONS 15327, ONS 15454 SONET, or ONS 15600 SONET NE and choose Configuration > NE Explorer.

Step 2 In the node property pane, click the Timing tab. Fields shown depend on the NE that is selected.

Step 3 In the General Timing section of the General subtab, complete the following information:

•Timing Mode—Set to External if the NE derives its timing from a building integrated timing supply (BITS) source wired to the backplane pins; set to Line if timing is derived from an OC-N card that is optically connected to the timing node. A third option, Mixed, allows users to set external and line timing references.

Caution Because mixed timing can cause timing loops, Cisco does not recommend its use. Use this mode with care.

Note The Mixed option is not applicable to the ONS 15600 SONET.

•SSM Message Set—Choose the message set level supported by the network. If a Generation 1 node receives a Generation 2 message, the message will be mapped down to the next available Generation 1. For example, an ST3E message becomes an ST3.

•Revertive—If checked, the NE reverts to a primary reference source after the conditions that caused it to switch to a secondary timing reference are corrected.

•Reversion Time—If Revertive is checked, indicate the amount of time that the NE will wait before reverting back to its primary timing source.

Cisco Transport Manager Release 6.0 User Guide

3-56	78-16845-01

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Contents Building the Network OverviewHow Do I Build Groups? Adding GroupsCopying Groups Field DescriptionDeleting a Single Group Moving GroupsDeleting Groups Deleting Multiple Groups How Do I Build Network Partitions?Adding Network Partitions Modifying Network Partitions Deleting Network PartitionsHow Do I Build Subnetworks? Adding SubnetworksDeleting Subnetworks How Do I Build NEs?Moving Subnetworks Prerequisites for Adding ONS 15302 and ONS 15305 NEs Prerequisites for Adding NEsPrerequisites for Adding ONS 15216 EDFA2 or EDFA3 NEs Building the Network Prerequisites for Adding NEs Hostnames and IP Addresses Required An Efficient Network Topology Setup Prerequisites for Adding ONS 1580x NEs Prerequisites for Adding Cisco CRS-1 and XR 12000 NEsPrerequisites for Adding Cisco Catalyst 6509 NEs Prerequisites for Adding Cisco MGX Voice Gateway DevicesSetting Up Nonstandard Community Strings Option DescriptionChanging the Service-Level Passwords Using the CLI Adding NEs Adding a Single NENE ID Adding Multiple NEs NE ID- Read-onlyField Descriptions for the Add New NE Wizard NE Properties Panel Not selectable if Automatic subnetwork Grouping is enabled Copying an NE from One Group to Another Moving an NE from One Group to AnotherMoving an NE from One Network Partition to Another Automatically Grouping NEs in SubnetworksDeleting NEs Deleting a Single NEDeleting Multiple NEs Removing a Deleted NE Searching for an NE How Do I Build Links?Restoring a Deleted NE Overview of Supported Links ONS 15454 Sonet NE Model NE Card Physical LayerOPT-BST ONS 15600 Sonet Viewing the Link Table File10describes the fields in Link table Field Description Filtering the Link Table Filtering Links in the Network MapCreating Links Building the Network Creating Links 12 Field Descriptions for the Create Link Wizard Field Descriptions for the Create Link Wizard Link Type Link Validity Link Color Modifying LinksField 14 Field Descriptions for the Modify Link Wizard Deleting Links Viewing Link UtilizationFiltering the Link Utilization Table Column DescriptionPayload Type Description How Do I Use Network Maps?Customizing a Network Map Click UI Properties Adjusting the Zoom Level or Pan Position Viewing a Node in the Network MapModifying a Map Background Modifying a Node Icon or a Map Background ImageModifying a Node Icon Saving Changes to the Network Map Discovery Information Table Discovering CTC-Based NEsDiscovering ONS 155xx NEs Rediscovering ONS 155xx, CRS-1, and XR 12000 NEs Time stampResetting the Resync Interval How Do I Discover the Network for MGX Voice Gateway Devices? Discovering NEs Message Quality DescriptionSetting Up External or Line Timing for CTC-Based Sonet NEs Building the Network Setting Up Internal Timing for CTC-Based Sonet NEs Bits 1 OUTOOS Setting Up External or Line Timing for CTC-Based SDH NEs Unframed , FAS , FAS + CAS Bits 1 OUT Setting Up Internal Timing for CTC-Based SDH NEs Viewing Clocking Sources Displaying the List of Manual Clock Sources Configuring Global ClockingDisplaying the List of Available Clock Sources Method Description How Do I Test Connectivity for Optical and Routing Devices?Creating a Manual Clock Source Pinging an NE Testing NE ConnectivityHow Do I Test Connectivity for MGX Voice Gateway Devices? Cisco Transport Manager Release 6.0 User Guide 78-16845-01

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