Cisco ONS 15327 Procedure Guide, Release 6.0
Chapter 12, Convert Network Configurations
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Convert Network Configurations

Table Of Contents

Convert Network Configurations

Before You Begin

NTP-B267 Convert a Point-to-Point to a Linear ADM Automatically

NTP-B154 Convert a Point-to-Point to a Linear ADM Manually

NTP-B256 Convert a Point-to-Point or Linear ADM to a Two-Fiber BLSR Automatically

NTP-B155 Convert a Point-to-Point or a Linear ADM to a Two-Fiber BLSR Manually

NTP-B257 Convert a Point-to-Point or Linear ADM to a Path Protection Automatically

NTP-B156 Convert a Point-to-Point or Linear ADM to a Path Protection Manually

NTP-B258 Convert a Path Protection to a Two-Fiber BLSR Automatically

NTP-B210 Convert a Path Protection to a Two-Fiber BLSR Manually

NTP-B159 Modify a BLSR


Convert Network Configurations


This chapter explains how to convert from one SONET topology to another in a Cisco ONS 15327 network. For initial network turn-up, see Chapter 4 "Turn Up Network,"


Note The terms "Unidirectional Path Switched Ring" and "UPSR" may appear in Cisco literature. These terms do not refer to using Cisco ONS 15xxx products in a unidirectional path switched ring configuration. Rather, these terms, as well as "Path Protected Mesh Network" and "PPMN," refer generally to Cisco's path protection feature, which may be used in any topological network configuration. Cisco does not recommend using its path protection feature in any particular topological network configuration.


Before You Begin

This section lists the chapter procedures (NTPs). Turn to a procedure for applicable tasks (DLPs).

1. B267 Convert a Point-to-Point to a Linear ADM Automatically—Complete as needed.

2. B154 Convert a Point-to-Point to a Linear ADM Manually—Complete as needed if the in-service topology upgrade wizard is not available or you need to back out of the wizard.

3. B256 Convert a Point-to-Point or Linear ADM to a Two-Fiber BLSR Automatically—Complete as needed.

4. B155 Convert a Point-to-Point or a Linear ADM to a Two-Fiber BLSR Manually—Complete as needed if the in-service topology upgrade wizard is not available or you need to back out of the wizard.

5. B257 Convert a Point-to-Point or Linear ADM to a Path Protection Automatically—Complete as needed.

6. B156 Convert a Point-to-Point or Linear ADM to a Path Protection Manually—Complete as needed if the in-service topology upgrade wizard is not available or you need to back out of the wizard.

7. B258 Convert a Path Protection to a Two-Fiber BLSR Automatically—Complete as needed.

8. B210 Convert a Path Protection to a Two-Fiber BLSR Manually—Complete as needed if the in-service topology upgrade wizard is not available or you need to back out of the wizard.

9. B159 Modify a BLSR—Complete as needed.

NTP-B267 Convert a Point-to-Point to a Linear ADM Automatically

Purpose

This procedure upgrades a 1+1 point-to-point configuration (two nodes) to a linear add-drop multiplexer (ADM) configuration (three or more nodes) without disrupting traffic.

Tools/Equipment

None

Prerequisite Procedures

This procedure requires that the node to be added is reachable (has IP connectivity with CTC).

If the PC running CTC and the ONS 15327s are not at the same location, two technicians who can communicate with each other during the upgrade might be needed.

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Note OC-N transmit and receive levels should be in their acceptable range as shown in the specifications for each card in the Table 1-1.



Note If overhead circuits exist on the network, this procedure is service affecting. The overhead circuits will drop traffic and have a status of PARTIAL after the upgrade is complete.



Step 1 Complete the "DLP-B60 Log into CTC" task at a node on the point-to-point or linear ADM. If you are already logged in, continue with Step 2.

Step 2 In network view, right-click the span between the two nodes where you want to the new node. The Select Upgrade Protection dialog box appears.

Step 3 Choose Terminal to Linear from the drop-down list. The first page of the wizard, Upgrade Protection: Terminal to Linear, appears.

Step 4 The Upgrade Protection: Terminal to Linear page lists the following conditions that must be met before adding a new node:

The terminal network has no critical or major alarms.

The node that you will add has no critical or major alarms.

The node has a compatible software version with that of the terminal nodes.

The node has four unused optical ports matching the speed of the 1+1 protection and no DCC has been provisioned on these four ports.

Fiber is available to connect the added node to the terminal nodes.

If all of these conditions are met and you wish to continue with the procedure, click Next.


Note If you are attempting to add an unreachable node, you must first log in to the unreachable node using a separate CTC session and configure that node. Delete any existing protection groups as described in "DLP-B155 Delete a 1+1 Protection Group" task. Delete any existing DCC terminations as described in the "DLP-B27 Delete a Section DCC Termination" task and the "DLP-B28 Delete a Line DCC Termination" task.


Step 5 Enter the node host name or IP address or choose the name of the new node from the drop-down list. If you type in the name, make sure it is identical to the actual node name. The node name is case sensitive.

Step 6 Click Next. The Select Protection Group Ports page appears.

Step 7 Choose the working and protect ports on the new node that you want to connect to each terminal node from the drop-down lists.

Step 8 Click Next. The Re-fiber the Protected Path dialog box appears. Follow the instructions in the dialog box for connecting the fibers between the nodes. When the fibers are connected properly, click Next. The Update Circuit(s) on Node Name dialog box appears.


Note The Back button is not enabled in the wizard. You can click the Cancel button at this point and choose Yes if you want to cancel the procedure. If the procedure fails after you have physically moved the fiber-optic cables, you must restore the fiber-optic cables to the original positions and verify (through CTC) that traffic is on the working path of the nodes before restarting the process. To check traffic status, go to node view and click the Maintenance > Protection tabs. In the Protection Groups area, click the 1+1 protection group. You can see the status of the traffic in the Selected Group area.


Step 9 Click Next on the Update Circuit(s) on Node Name page to continue with the procedure.

Step 10 The Force Traffic to Protect Path page states that it is about to force the traffic from the working to protect path for the terminal nodes. When you are ready to proceed, click Next.

Step 11 Follow each step as instructed by the wizard as it guides you through the process of refibering the working path between nodes and forcing the traffic back to the working path.

Step 12 The Force Traffic to Working Path page states that it is about to force the traffic from the protect to working path for the terminal nodes. When you are ready to proceed, click Next.

Step 13 On the Completed page, click Finish.

Stop. You have completed this procedure.


NTP-B154 Convert a Point-to-Point to a Linear ADM Manually

Purpose

This procedure upgrades a 1+1 point-to-point configuration (two nodes) to a linear ADM configuration (three or more nodes) manually, that is, without using the in-service topology upgrade wizard. Use this procedure if the wizard is unavailable or if you need to back out of the wizard.

Tools/Equipment

None

Prerequisite Procedures

The node that will be added must have OC-N cards installed. See Chapter 1 "Install Hardware," and Chapter 3 "Turn Up Node," for procedures.

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Note Optical transmit and receive levels should be in their acceptable range as shown in the specifications section for each card in Table 1-1.



Note In a point-to-point configuration, two OC-N cards are connected to two OC-N cards on a second node.



Step 1 Complete the "DLP-B60 Log into CTC" task at one of the two point-to-point nodes. If you are already logged in, continue with Step 2.

Step 2 Complete the "DLP-B298 Check the Network for Alarms and Conditions" task.

Step 3 Log into the node that will be added to the point-to-point configuration (the new node).

Step 4 Complete the "NTP-B24 Verify Card Installation" procedure to ensure that the new node has two OC-N cards with the same rate as the point-to-point nodes.

Step 5 Complete the "NTP-B35 Verify Node Turn Up" procedure for the new node.

Step 6 Physically connect the fibers between the point-to-point node and the new node. The fiber connections should be connected working card to working card and protect card to protect card.

Step 7 On the new node, create a 1+1 protection group for the OC-N cards in the point-to-point node that will connect to the point-to-point node. See the "NTP-B170 Create 1+1 Protection Groups" procedure for instructions.

Step 8 Complete the "DLP-B253 Provision Section DCC Terminations" task for the working OC-N cards in the new node that will connect to the linear ADM network. (Alternatively, if additional bandwidth is needed for Cisco Transport Controller [CTC] management, complete the "DLP-B24 Provision Line DCC Terminations" task.) Make sure to set the Port Admin State in the Create SDCC Termination dialog box to IS.


Note Data communications channel (DCC) failure alarms appear until you create DCC terminations in the point-to-point node.


Step 9 In node view, display the point-to-point node that will connect to the new node.

Step 10 Complete the "NTP-B24 Verify Card Installation" procedure to ensure that the point-to-point node has OC-N cards installed that can connect to the new node.

Step 11 Create a 1+1 protection group for the OC-N cards that will connect to the new node. See the "NTP-B170 Create 1+1 Protection Groups" procedure for instructions.

Step 12 Create DCC terminations on the working OC-N card that will connect to the new node. See the "DLP-B253 Provision Section DCC Terminations" task. (Alternatively, if additional bandwidth is needed for CTC management, complete the "DLP-B24 Provision Line DCC Terminations" task.) In the Create SDCC Termination dialog box, set the Port Admin State to IS.

Step 13 From the View menu, choose Go to Node View to display the new node in node view.

Step 14 Complete the "NTP-B28 Set Up Timing" procedure for the new node. If the new node is using line timing, set the working OC-N card as the timing source.

Step 15 From the View menu, choose Go to Network View to display the network view to verify that the newly created linear ADM configuration is correct. One green span lines should appear between each linear node.

Step 16 Click the Alarms tab.

a. Verify that the alarm filter is not on. See the "DLP-B227 Disable Alarm Filtering" task as necessary.

b. Verify that no unexplained alarms appear on the network. If alarms are present, investigate and resolve them before continuing. Refer to the Cisco ONS 15327 Troubleshooting Guide if necessary.

Step 17 Repeat the procedure if you want to add an additional node to the linear ADM.

Stop. You have completed this procedure.


NTP-B256 Convert a Point-to-Point or Linear ADM to a Two-Fiber BLSR Automatically

Purpose

This procedure converts an unprotected point-to-point or 1+1 linear ADM to a two-fiber bidirectional line switched ring (BLSR) without disrupting traffic.

Tools/Equipment

None

Prerequisite Procedures

B44 Provision Path Protection Nodes

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Note Before beginning this procedure, you should have a unique ring name to identify the new BLSR and a unique node ID number for each node on the ring.



Note Before beginning this procedure, optical transmit and receive levels should be in their acceptable range as shown in Table 1-1.



Note If overhead circuits exist on the network, an in-service topology upgrade is service affecting. The overhead circuits will drop traffic and have a status of PARTIAL after the upgrade is complete.



Step 1 Complete the "DLP-B60 Log into CTC" task at a node on the point-to-point or linear ADM. If you are already logged in, continue with Step 2.

Step 2 Complete the "DLP-B298 Check the Network for Alarms and Conditions" task.

Step 3 Complete the "DLP-B155 Delete a 1+1 Protection Group" task at the nodes that support the point-to-point or linear ADM span.

Step 4 Complete the "DLP-B253 Provision Section DCC Terminations" task at the nodes that support the point-to-point or linear ADM span. Provision the slot in each node that is not already in the SDCC Terminations list.

Step 5 In the Tools menu, choose Topology Upgrade > Convert UPSR to BLSR. In the Topology Conversion dialog box, set the BLSR properties:

Ring Type—(Display only) The default is two-fiber.

Speed—Choose the BLSR ring speed: OC-12, OC-48, or OC-192. The speed must match the OC-N speed of the BLSR trunk (span) cards.

Ring Name—Assign a ring name. The name can be from 1 to 6 characters in length. Any alphanumeric string is permissible, and upper and lower case letters can be combined. Do not use the character string "All" in either upper or lower case letters. This is a TL1 keyword and will be rejected. Do not choose a name that is already assigned to another BLSR.

Reversion time—Set the amount of time that will pass before the traffic reverts to the original working path following a ring switch. The default is 5 minutes. Ring reversions can be set to Never.

Step 6 Click Next. If the network graphic appears, continue with Step 7.

If CTC determines that a BLSR cannot be created, for example, not enough optical cards are installed or it finds circuits with path protection selectors, a "Cannot Create BLSR" message appears. If this occurs, complete the following steps:

a. Click OK.

b. In the Create BLSR window, click Excluded Nodes. Review the information explaining why the BLSR could not be created, then click OK.

c. Depending on the problem, click Back to start over or click Cancel to cancel the operation.

d. Complete the "NTP-B40 Provision BLSR Nodes" procedure, making sure that all steps are completed accurately, then start this procedure again.

Step 7 In the network graphic, double-click a BLSR span line. If the span line is DCC connected to other BLSR cards that constitute a complete ring, the lines turn blue. If the lines do not form a complete ring, double-click span lines until a complete ring is formed. Click Next.

Step 8 The UPSR to BLSR Topology Conversion dialog appears. The dialog box states that the system is about to force traffic to the shortest path protection paths. Click Next to continue.

Step 9 Another dialog box appears, stating that the force has been applied to the shortest path protection. Click Finish.

If the BLSR window appears with the BLSR you created, continue with Step 10. If a "Cannot Create BLSR" or "Error While Creating BLSR" message appears, complete the following:

a. Click OK.

b. In the Create BLSR window, click Excluded Nodes. Review the information explaining why the BLSR could not be created, then click OK.

c. Depending on the problem, click Back to start over or click Cancel to cancel the operation.

d. Complete the "NTP-B40 Provision BLSR Nodes" procedure, making sure that all steps are completed accurately, then start this procedure again.


Note Some or all of the following alarms might briefly appear during BLSR setup: East-west mismatch (E-W MISMATCH), procedural error mismatch (RING-MISMATCH), improper SONET APS code (APSC-IMP), APS default K byte received (APSCDFLTK), or BLSR out of synchronization (BLSROSYNC).


Step 10 Verify the following:

On the network view graphic, a green span line appears between all BLSR nodes.

All E-W MISMATCH, RING MISMATCH, APSCIMP, DFLTK, and BLSROSYNC alarms are cleared. Refer to the Cisco ONS 15327 Troubleshooting Guide for alarm troubleshooting.

Stop. You have completed this procedure.


NTP-B155 Convert a Point-to-Point or a Linear ADM to a Two-Fiber BLSR Manually

Purpose

This procedure upgrades a point-to-point configuration or linear ADM to a two-fiber BLSR manually, that is, without using the in-service topology upgrade wizard. Use this procedure if the wizard is unavailable or if you need to back out of the wizard.

Tools/Equipment

None

Prerequisite Procedures

B124 Provision a Point-to-Point Network or

B38 Provision a Linear ADM Network

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Caution This procedure is service affecting.


Note Optical transmit and receive levels should be in their acceptable range as shown in the specifications section for each card (see Table 1-1).



Step 1 Complete the "DLP-B60 Log into CTC" task at one of the nodes that you want to convert from a point-to-point or ADM to a BLSR. If you are already logged in, continue with Step 2.

Step 2 According to local site practice, complete the "NTP-B108 Back Up the Database" procedure for each node in the configuration.

Step 3 Complete the "DLP-B298 Check the Network for Alarms and Conditions" task.

Step 4 On the network map, right-click a span adjacent to the node you are logged into. A shortcut menu appears.

Step 5 From the shortcut menu, click Circuits. The Circuits on Span window appears.

Step 6 Verify that the total number of active synchronous transport signal (STS) circuits does not exceed 50 percent of the span bandwidth. In the Circuits column, there is a block titled Unused. The number in this column should be greater than 50 percent of the span bandwidth.


Note If the span is an OC-48, no more than 24 STSs can be provisioned on the span. If the span is an OC-12, no more than 6 STSs can be provisioned on the span.



Caution If the first half of the capacity is exceeded, this procedure cannot be completed. Bandwidth must be 50 percent unassigned to convert to a BLSR. Refer to local procedures for relocating circuits if these requirements are not met.

Step 7 Repeat Steps 4 through 6 for each node in the point-to-point or linear ADM that you will convert to a BLSR. When all nodes comply with Step 6, continue with the next step.

Step 8 For every node in the point-to-point or linear ADM network that you want to convert to a BLSR, complete the following tasks:

a. Complete the "DLP-B189 Verify That a 1+1 Working Slot Is Active" task for every 1+1 protection group that supports a span in the point-to-point or linear ADM network.

b. Complete the "DLP-B155 Delete a 1+1 Protection Group" task at each node that supports the point-to-point or linear ADM span.

c. Complete the "DLP-B214 Change the Service State for a Port" task to put the protect ports out of service at each node that supports the point-to-point or linear ADM span.

Step 9 (Linear ADM only.) Physically remove the protect fibers from all nodes in the linear ADM.

Step 10 Create the ring by connecting the protect fiber from one end node to the protect port on the other end node.


Note If you need to remove any OC-N cards from the shelf, do so now. See the "NTP-B219 Remove and Replace a Card" procedure.


Step 11 From the network view, click the Circuits tabs and complete the "DLP-B41 Export CTC Data" task to save the circuit data to a file on your hard drive.

Step 12 Complete the "DLP-B253 Provision Section DCC Terminations" task at the end nodes. Provision the slot in each node that is not already in the SDCC Terminations list.

Step 13 For circuits provisioned on an STS that is now part of the protection bandwidth (STSs 7 to 12 for an OC-12 BLSR, and STSs 25 to 48 for an OC-48 BLSR), delete and recreate each circuit:

a. Complete the "DLP-B13 Delete Circuits" task for one circuit.

b. Create the circuit on STSs 1 to 6 for an OC-12 BLSR, or on STSs 1 to 24 for an OC-48 BLSR on the fiber that served as the protect fiber in the linear ADM. See the "NTP-B262 Create a Manually Routed Optical Circuit" procedure for instructions.

c. Repeat Steps a and b for each circuit residing on a BLSR-protected STS.

Step 14 Complete the "NTP-B126 Create a BLSR" procedure to put the nodes into a BLSR.

Stop. You have completed this procedure.


NTP-B257 Convert a Point-to-Point or Linear ADM to a Path Protection Automatically

Purpose

This procedure upgrades a point-to-point or linear ADM to a path protection without disrupting traffic. You can upgrade STS, VT, and VT tunnel circuits to path protection. This option is a single circuit operation.

Tools/Equipment

None

Prerequisite Procedures

B124 Provision a Point-to-Point Network

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Note When upgrading VT tunnels, CTC does not convert the VT tunnel to path protection, but instead creates a secondary tunnel for the alternate path. The result is two unprotected VT tunnels using alternate paths.



Note If overhead circuits exist on the network, an in-service topology upgrade is service affecting. The overhead circuits will drop traffic and have a status of PARTIAL after the upgrade is complete.



Step 1 Complete the "DLP-B60 Log into CTC" task at a node on the point-to-point or linear ADM. If you are already logged in, continue with Step 2.

Step 2 If the point-to-point or linear ADM is 1+1 protected, complete the "DLP-B155 Delete a 1+1 Protection Group" task. If the point-to-point or linear ADM is unprotected, continue with Step 4.

Step 3 Complete the "DLP-B253 Provision Section DCC Terminations" task at the nodes that support the point-to-point or linear ADM span. (Alternatively, if additional bandwidth is needed for CTC management, complete the "DLP-B24 Provision Line DCC Terminations" task.) Provision the slot in each node that is not already in the SDCC Terminations list.

Step 4 From either network or node view, click the Circuits tab. Click the circuit you want to upgrade to select it.

Step 5 From the Tools menu, choose Topology Upgrade > Convert Unprotected to UPSR.

Step 6 To set the path protection parameters, complete the "DLP-B218 Provision Path Protection Selectors During Circuit Creation" task.

Step 7 Click Next.

Step 8 Complete one of the following tasks:

a. To route the new path protection circuit manually, complete "DLP-B338 Manually Route a Path Protection Circuit for a Topology Upgrade" task.

b. To route the new path protection circuit automatically, complete "DLP-B339 Automatically Route a Path Protection Circuit for a Topology Upgrade" task.

Stop. You have completed this procedure.


NTP-B156 Convert a Point-to-Point or Linear ADM to a Path Protection Manually

Purpose

This procedure upgrades a point-to-point system to a path protection manually, that is, without using the in-service topology upgrade wizard. Use this procedure if the wizard is unavailable or if you need to back out of the wizard.

Tools/Equipment

None

Prerequisite Procedures

B124 Provision a Point-to-Point Network or

B38 Provision a Linear ADM Network

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Caution This procedure is service affecting. All circuits are deleted and reprovisioned.


Step 1 Complete the "DLP-B60 Log into CTC" task at a node on the point-to-point or linear ADM.

Step 2 Complete the "DLP-B298 Check the Network for Alarms and Conditions" task.

Step 3 Complete the "DLP-B189 Verify That a 1+1 Working Slot Is Active" task for each node.

Step 4 Complete the "DLP-B155 Delete a 1+1 Protection Group" task for each 1+1 protection group that supports the point-to-point or linear ADM span.

Step 5 Complete the "DLP-B253 Provision Section DCC Terminations" task at the protect cards in all nodes that will be part of the path protection. Alternatively, if additional bandwidth is needed for CTC management, complete the "DLP-B24 Provision Line DCC Terminations" task.

Step 6 Complete the "DLP-B13 Delete Circuits" task and the "NTP-B261 Create an Automatically Routed Optical Circuit" procedure to delete and recreate the circuits one at a time.


Note If you want to add additional nodes to the path protection, see the "NTP-B105 Add a Path Protection Node" procedure.



Note A path protection is the default configuration if the cards are installed and the DCCs are configured.


Stop. You have completed this procedure.


NTP-B258 Convert a Path Protection to a Two-Fiber BLSR Automatically

Purpose

This procedure converts a path protection to a two-fiber BLSR without disrupting traffic.

Tools/Equipment

None

Prerequisite Procedures

B44 Provision Path Protection Nodes

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Note Open-ended path protection and path protection dual-ring interconnect (DRI) configurations do not support in-service topology upgrades.



Note Before beginning this procedure, you should have a unique ring name to identify the new BLSR and a unique node ID number for each node on the ring.



Note Before beginning this procedure, optical transmit and receive levels should be in their acceptable range as shown in Table 1-1.



Note If overhead circuits exist on the network, an in-service topology upgrade is service affecting. The overhead circuits will drop traffic and have a status of PARTIAL after the upgrade is complete.



Step 1 Complete the "DLP-B60 Log into CTC" task at a node on the path protection. If you are already logged in, continue with Step 2.

Step 2 Complete the "DLP-B298 Check the Network for Alarms and Conditions" task.

Step 3 From the Tools menu, choose Topology Upgrade > Convert UPSR to BLSR.

Step 4 In the path protection to BLSR Topology Conversion dialog box, set the BLSR properties:

Ring Type—(Display only) The default is two-fiber.

Speed—Choose the BLSR ring speed: OC-12, OC-48, or OC-192. The speed must match the OC-N speed of the BLSR trunk (span) cards.

Ring Name—Assign a ring name. The name can be from 1 to 6 characters in length. Any alphanumeric string is permissible, and upper and lower case letters can be combined. Do not use the character string "All" in either upper or lower case letters. This is a TL1 keyword and will be rejected. Do not choose a name that is already assigned to another BLSR.

Reversion time—Set the amount of time that will pass before the traffic reverts to the original working path following a ring switch. The default is 5 minutes. Ring reversions can be set to Never.

Step 5 Click Next. If the path protection to BLSR Topology Conversion dialog box with the network graphic appears, continue with Step 6.

If CTC determines that a BLSR cannot be created, for example, not enough optical cards are installed or it finds circuits with path protection selectors, a "Cannot Create BLSR" message appears. If this occurs, complete the following steps:

a. Click OK.

b. In the Create BLSR window, click Excluded Nodes. Review the information explaining why the BLSR could not be created, then click OK.

c. Depending on the problem, click Back to start over or click Cancel to cancel the operation.

d. Complete the "NTP-B40 Provision BLSR Nodes" procedure, making sure that all steps are completed accurately, then start this procedure again.

Step 6 In the network graphic, double-click a BLSR span line. If the span line is DCC connected to other BLSR cards that constitute a complete ring, the lines turn blue. If the lines do not form a complete ring, double-click span lines until a complete ring is formed. Click Next.

Step 7 The next path protection to BLSR Topology Conversion dialog box appears. The dialog box states that the system is about to force traffic to the shortest path protection paths. Click Next to continue.

Step 8 Another dialog box appears, stating that the force has been applied to the shortest path protection path. Click Finish.

If the BLSR window appears with the BLSR you created, continue with Step 9. If a "Cannot Create BLSR" or "Error While Creating BLSR" message appears, complete the following:

a. Click OK.

b. In the Create BLSR window, click Excluded Nodes. Review the information explaining why the BLSR could not be created, then click OK.

c. Depending on the problem, click Back to start over or click Cancel to cancel the operation.

d. Complete the "NTP-B40 Provision BLSR Nodes" procedure, making sure that all steps are completed accurately, then start this procedure again.


Note Some or all of the following alarms might briefly appear during BLSR setup: E-W MISMATCH, RING MISMATCH, APSCIMP, APSDFLTK, or BLSROSYNC.


Step 9 Verify the following:

On the network view graphic, a green span line appears between all BLSR nodes.

All E-W MISMATCH, RING MISMATCH, APSCIMP, DFLTK, and BLSROSYNC alarms are cleared. Refer to the Cisco ONS 15327 Troubleshooting Guide for alarm troubleshooting.

Stop. You have completed this procedure.


NTP-B210 Convert a Path Protection to a Two-Fiber BLSR Manually

Purpose

This procedure converts a path protection to a two-fiber BLSR manually, that is, without using the in-service topology upgrade wizard. Use this procedure if the wizard is unavailable or if you need to back out of the wizard.

Tools/Equipment

None

Prerequisite Procedures

B44 Provision Path Protection Nodes

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Caution This procedure is service affecting. All circuits on the ring are deleted and reprovisioned.


Caution Read through this procedure completely before beginning the conversion.


Note Before beginning this procedure, you should have a unique ring name to identify the new BLSR and a unique node ID number for each node on the ring.



Note Before beginning this procedure, optical transmit and receive levels should be in their acceptable range as shown in the specifications section for each card. (See Table 1-1.)



Step 1 Complete the "DLP-B60 Log into CTC" task at one of the nodes on the path protection. If you are already logged in, continue with Step 2.

Step 2 Complete the "DLP-B298 Check the Network for Alarms and Conditions" task.

Step 3 On the network map, right-click a span adjacent to the node you are logged into. A shortcut menu appears.

Step 4 From the shortcut menu, click Circuits. The Circuits on Span window appears.

Step 5 Verify that the total number of active STS circuits does not exceed 50 percent of the span bandwidth. In the Circuits column, there is a block titled "Unused." This number should be greater than 50 percent of the span bandwidth.


Note If the span is an OC-48, no more than 24 STSs can be provisioned on the span. If the span is an OC-12, no more than 6 STSs can be provisioned on the span.



Caution If the first half of the capacity is exceeded, this procedure cannot be completed. Bandwidth must be 50 percent unassigned to convert to BLSR. Refer to local procedures for relocating circuits if these requirements are not met.

Step 6 Repeat Steps 1 through 5 for each node in the path protection that you will convert to a BLSR. When all nodes are complete, continue with the next step.

Step 7 Save all circuit information:

a. In network view, click the Circuits tab.

b. Record the circuit information using one of the following options:

From the File menu, choose Print to print the circuits table. Refer to the "DLP-B40 Print CTC Data" task for more information.

From the File menu, choose Export and choose the data format: HTML, CSV (comma separated values), or TSV (tab separated values). Click OK and save the file in a temporary directory. Refer to the "DLP-B41 Export CTC Data" task for more information.

Step 8 Delete the circuits:

a. In network view, click the Circuits tab. All circuits on the ring appear.


Note To delete circuits one at a time from each node, refer to the "DLP-B13 Delete Circuits" task.


b. With the Ctrl key pressed, click each circuit. Each line turns dark blue as it is selected.

c. After all circuits have been selected, click Delete. Allow several minutes for processing; the actual length of time depends on the number of circuits in the network.

Step 9 Complete the "NTP-B126 Create a BLSR" procedure to create the BLSR.

Step 10 To recreate the circuits, see Chapter 5 "Create Circuits and VT Tunnels" and choose the applicable procedure for the circuit type you want to enter.


Note To add additional nodes to a BLSR, refer to the "NTP-B102 Add a BLSR Node" procedure.


Stop. You have completed this procedure.


NTP-B159 Modify a BLSR

Purpose

This procedure changes a BLSR ring name, node ID, or ring and span reversion times.

Tools/Equipment

None

Prerequisite Procedures

B126 Create a BLSR

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Step 1 Complete the "DLP-B60 Log into CTC" task at a node in the BLSR you want to modify. If you are already logged in, continue with Step 2.

Step 2 Complete the "DLP-B298 Check the Network for Alarms and Conditions" task.


Note Some or all of the following alarms appear during BLSR setup: E-W MISMATCH, RING MISMATCH, APSCIMP, APSDFLTK, and BLSROSYNC. The alarms clear after you configure all the nodes in the BLSR. For definitions of these alarms, refer to the Cisco ONS 15327 Troubleshooting Guide.


Step 3 To change the BLSR ring name or the ring or span reversion times, complete the following steps. If you want to change a node ID, continue with Step 4.

a. In network view, click the Provisioning > BLSR tabs.

b. Click the BLSR you want to modify and click Edit.

c. In the BLSR window, change any of the following:

Ring Name—Assign a ring name. The name can be from 1 to 6 characters in length. The alphanumeric character strings that can be used are 0 to 9 and A to Z. You can combine numbers and letters and use upper or lower case letters. Do not use the character string "All" in either upper or lower case letters because it is a TL1 keyword. Do not choose a name that is already assigned to another BLSR.

Reversion time—If needed, change the amount of time that will pass before the traffic reverts to the original working path after a ring switch.

d. Click Apply.

If you changed the ring name, the BLSR window closes automatically. If you only changed a reversion time, close the window by choosing Close from the File menu.

Step 4 To change a BLSR node ID, complete the following steps; otherwise, continue with Step 5.

a. On the network map, double-click the node with the node ID you want to change.

b. Click the Provisioning > BLSR tabs.

c. Choose a Node ID number. Do not choose a number already assigned to another node in the same BLSR.

d. Click Apply.

Step 5 In network view, verify the following:

A green span line appears between all BLSR nodes.

All E-W MISMATCH, RING MISMATCH, APSCIMP, DFLTK, BLSROSYNC, and Node ID Mismatch alarms are cleared.


Note For definitions of these alarms, refer to the Cisco ONS 15327 Troubleshooting Guide.


Stop. You have completed this procedure.