Cisco ONS 15454 Procedure Guide, Releases 4.1.x and 4.5
Chapter 16, Add and Remove BLSR and Path Protection Nodes
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Add and Remove BLSR and Path Protection Nodes

Table Of Contents

Add and Remove BLSR and Path Protection Nodes

Before You Begin

NTP-A212 Add a BLSR Node

DLP-A302 Check BLSR or Path Protection Alarms and Conditions

DLP-A242 Create a BLSR on a Single Node

DLP-A303 Initiate a BLSR Force Ring Switch

DLP-A194 Clear a BLSR Force Ring Switch

NTP-A213 Remove a BLSR Node

DLP-A195 Verify Timing in a Reduced Ring

DLP-A304 Verify BLSR and Path Protection Pass-Through Circuits

DLP-A422 Verify BLSR Extension Byte Mapping

DLP-A196 Delete a BLSR from a Single Node

NTP-A105 Add a Path Protection Node

DLP-A197 Initiate a Path Protection Force Switch

DLP-A198 Clear a Path Protection Force Switch

NTP-A106 Remove a Path Protection Node


Add and Remove BLSR and Path Protection Nodes



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.


This chapter explains how to add and remove Cisco ONS 15454 nodes from bidirectional line switched rings (BLSRs) and path protection configurations.


Note The procedures and tasks in this chapter do not apply to DWDM (Software Release 4.5) nodes.


Before You Begin

Before performing any of the following procedures, complete the "A195 Document Existing Provisioning" procedure. Also investigate all alarms and clear any trouble conditions. Refer to the Cisco ONS 15454 Troubleshooting Guide as necessary.

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

1. A212 Add a BLSR Node—Complete as needed.

2. A213 Remove a BLSR Node—Complete as needed.

3. A105 Add a Path Protection Node—Complete as needed.

4. A106 Remove a Path Protection Node—Complete as needed.

NTP-A212 Add a BLSR Node

Purpose

This procedure expands a BLSR by adding a node.

Tools/Equipment

Fiber for new node connections

Prerequisite Procedures

Cards must be installed and node turn-up procedures completed on the node that will be added to the BLSR. See Chapter 2, "Install Cards and Fiber-Optic Cable," and Chapter 4, "Turn Up Node."

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Caution Adding a BLSR node can be service affecting and should be performed during a maintenance window.


Step 1 Draw a diagram of the BLSR where you will add the node. In the diagram, identify the east and west BLSR OC-N trunk (span) cards that will connect to the new node. This information is essential to complete this procedure without error. Figure 16-1 shows a drawing of a three-node, two-fiber BLSR that uses Slots 5 and 12 for the BLSR trunk cards. The dashed arrow shows the new fiber connections that will be made to add the fourth node to the BLSR.

Figure 16-1 Three-Node, Two-Fiber BLSR Before a Fourth Node Is Added

Figure 16-2 shows a sample drawing of a four-fiber BLSR. The dashed arrow shows the new fiber connections that will be made to add the fourth node. For four-fiber BLSRs, two fiber sets will be reconnected, the working fiber and the protect fiber.

Figure 16-2 Three-Node, Four-Fiber BLSR Before a Fourth Node is Added

Step 2 According to local site practice, complete the "NTP-A108 Back Up the Database" procedure on page 17-7 for all the nodes in the ring.

Step 3 Verify the card installation on the new node using the "NTP-A24 Verify Card Installation" procedure on page 4-2. Verify that the OC-N cards that will be the BLSR trunk cards match the BLSR optical rate. For example, if the BLSR is OC-48, the new node must have OC-48 cards installed. If the OC-N cards are not installed or the optical rates do not match the BLSR, complete the "NTP-A16 Install the OC-N Cards" procedure on page 2-13.

Step 4 Verify that fiber is available to connect the new node to the existing nodes. Refer to the diagram drawn in Step 1.

Step 5 Complete the "A35 Verify Node Turn Up" procedure. In order to have CTC visibility to the new node after it is added, you must be an authorized user on the node and you must have IP connectivity to the node.

Step 6 Determine if the following conditions are present:

The IP address for the new node is on the same subnet as other nodes in the network.

On the new node Provisioning > Network > General subtab, Craft Access Only is not checked under Gateway Settings.

A CTC computer is directly connected to the new node.

CTC computers are directly connected to other nodes on the same subnet.

If the conditions are not present, continue with Step 7. If these conditions are present, complete the "DLP-A65 Create a Static Route" task on page 4-14 on the node that will be added to the BLSR using the following settings:

Destination IP address: IP address of the CTC computer connected to the new node

Net Mask: 255.255.255.255

Next Hop: IP address of the Cisco ONS 15454

Cost: 1

To view Gateway Settings, see the "DLP-A249 Provision IP Settings" task on page 4-9.

Step 7 Complete the "DLP-A60 Log into CTC" task on page 3-26 at a node in the BLSR.

Step 8 Complete the "DLP-A302 Check BLSR or Path Protection Alarms and Conditions" task to verify that the BLSR is free of major alarms or problems. If trouble is indicated (for example, a major alarm exists), resolve the problem before proceeding. See "Manage Alarms" or, if necessary, refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 9 Click the Circuits tab. If any circuits on the BLSR show an Upgradable status, complete the "NTP-A417 Upgrade TL1 Cross-Connects to CTC Circuits" procedure on page 11-19 to upgrade the circuits.

Step 10 Click the Provisioning > BLSR tabs.

Step 11 On paper, record the Ring ID, Ring Type, Line Rate, Ring Reversion, and Span Reversion (4 Fiber).

Step 12 From the Node column, record the Node IDs in the BLSR. The Node IDs are the numbers in parentheses next to the node name.

Step 13 Log into the new node:

If the node has a LAN connection and appears on the network map, from the View menu, choose Go to Other Node, then enter the new node.

If the new node is not connected to the network, log into it using the "DLP-A60 Log into CTC" task on page 3-26.

Step 14 Click the Alarms tab. Verify that no critical or major alarms are present, nor any facility alarms, such as LOS, LOF, AIS-L, SF, and SD. If trouble is indicated (for example, a major alarm exists), resolve the problem before proceeding. See "Manage Alarms"or, if necessary, refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 15 Using the information recorded in Steps 11 and 12 and the diagram created in Step 1, create a BLSR on the new node. See the "DLP-A242 Create a BLSR on a Single Node" task.

Step 16 (Optional) Create test circuits, making sure they pass through the BLSR trunk cards, and run test traffic through the node to ensure the cards are functioning properly. See the "NTP-A189 Create a Manually Routed OC-N Circuit" procedure on page 8-47 and the "NTP-A62 Test OC-N Circuits" procedure on page 8-55 for information.

Step 17 Create the DCC terminations on the new node. See the "DLP-A253 Provision SONET DCC Terminations" task.


Note Creating the DCC terminations causes the SDCC Termination Failure and Loss of Signal alarms to appear. These alarms will remain active until you connect the node to the BLSR.



Note If you map the K3 byte to another byte (such as E2), you must remap the line cards on either side of the new node to the same byte. See the "DLP-A89 Remap the K3 Byte" task.


Step 18 Complete the "DLP-A60 Log into CTC" task on page 3-26 at a BLSR node that will connect to the new node.

Step 19 Referring to the diagram created in Step 1, complete the "DLP-A303 Initiate a BLSR Force Ring Switch" task on the node that will connect to the new node on its west line (port).

Step 20 Referring to the diagram created in Step 1, complete the "DLP-A303 Initiate a BLSR Force Ring Switch" task on the node that will connect to the new node on its east line (port).

Step 21 Click the Alarms tab. If unexpected critical or major alarms appear, resolve them before you continue. If necessary, refer to the alarm troubleshooting procedures in the Cisco ONS 15454 Troubleshooting Guide.

Step 22 Following the diagram created in Step 1, remove the fiber connections from the two nodes that will connect to the new node.

a. Remove the west fiber from the node that will connect to the east port of the new node. In the Figure 16-1 example, this is Node 1/Slot 5, and in Figure 16-2 this is Node 1, Slots 5 and 6.

b. Remove the east fiber from the node that will connect to the west port of the new node. In the Figure 16-1 example, this is Node 3/Slot 12, and in Figure 16-2 this is Node 3, Slots 12 and 13.

Step 23 Connect fibers from the adjacent nodes to the new node following the diagram created in Step 1. Connect the west port to the east port and the east port to the west port. For 4-fiber BLSRs, connect the protect fibers.

Step 24 Display the newly added node in node view.

Step 25 Click the Provisioning > BLSR tabs.

Step 26 Click Ring Map. Verify that the new node appears on the Ring Map with the other BLSR nodes, then click OK.

Step 27 From the View menu, choose Go to Network View and check the following:

a. Click the Provisioning > BLSR tabs. Verify that the new node appears under the Node column.

b. Click the Alarms tab. Verify that BLSR alarms such as RING MISMATCH, E-W MISMATCH, PRC-DUPID (duplicate node ID), and APSCDFLTK (default K) do not appear.

If the new node does not appear in the Node column, or if BLSR alarms are present, log into the new node and verify that the BLSR is provisioned on it correctly with the information from Steps 11 and 12. If the node still does not appear, or if alarms persist, refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 28 Click the Circuits tab. Wait until all the circuits are discovered. The circuits that pass through the new node will be shown as incomplete.


Note If the circuits take more than a minute to appear, log out of CTC, then log back in.


Step 29 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 30 If incomplete circuits are still present, refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 31 Click the History tab. Verify that BLSR_RESYNC conditions appear for every node in the BLSR.

Step 32 Complete the "DLP-A194 Clear a BLSR Force Ring Switch" task to remove the ring switch from the east and west BLSR lines.

Step 33 If you want to convert the circuits upgraded to CTC circuits in the Step 9 to TL1-like cross-connects, complete the "NTP-A416 Convert a CTC Circuit to TL1 Cross-Connects" procedure on page 11-18.

Step 34 According to local site practice, complete the "A175 Two-Fiber BLSR Acceptance Test" procedure or the "A176 Four-Fiber BLSR Acceptance Test" procedure.

Stop. You have completed this procedure.


DLP-A302 Check BLSR or Path Protection Alarms and Conditions

Purpose

Use this task to check a BLSR or path protection for alarms and conditions before performing any major administrative change to the ring such as adding and removing nodes.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

Required before performing any major change to the ring.

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Step 1 From the View menu, choose Go to Network View.

Step 2 Verify that all BLSR or path protection spans on the network map are green.

Step 3 Click the Alarms tab. Verify that no critical or major alarms are present, nor any facility alarms, such as LOS, LOF, AIS-L, SF, and SD. In a BLSR, these facility conditions might be reported as minor alarms. Make sure the Filter button in the lower right corner of the window is off (not indented).

Step 4 Click the Conditions tab and click Retrieve Conditions. Verify that no ring switches are active. Make sure the Filter button in the lower right corner of the window is off (not indented).

Step 5 Return to the originating procedure (NTP).


DLP-A242 Create a BLSR on a Single Node

Purpose

This task creates a BLSR on a single node. Use it to add a node to an existing BLSR or when you delete and then recreate a BLSR temporarily on one node.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Step 1 In node view, click the Provisioning > BLSR tabs.

Step 2 In the Suggestion dialog box, click OK.

Step 3 In the Create BLSR dialog box, enter the BLSR information:

Ring Type—Enter the ring type (either 2 Fiber or 4 Fiber) of the BLSR.

Ring ID—Enter the BLSR ring ID. If the node is being added to a BLSR, use the BLSR ring ID.

Node ID—Enter the node ID. If the node is being added to a BLSR, use an ID that is not used by other BLSR nodes.

Ring Reversion—Enter the ring reversion time of the existing BLSR.

West Line—Enter the slot on the node that will connect to the existing BLSR via the node's west line (port).

East Line—Enter the slot on the node that will connect to the existing BLSR via the node's east line (port).

If you are adding the node to a four-fiber BLSR, complete the following for the second set of fibers:

Span Reversion—Enter the span reversion time of the existing BLSR.

West Line—Enter the slot on the node that will connect to the existing BLSR via the node's west line.

East Line—Enter the slot on the node that will connect to the existing BLSR via the node's east line.

Step 4 Click OK.


Note The BLSR is incomplete and alarms are present until the node is connected to other BLSR nodes.


Step 5 Return to your originating procedure (NTP).


DLP-A303 Initiate a BLSR Force Ring Switch

Purpose

Use this task to perform a BLSR Force switch on a BLSR port.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Caution The Force Switch Away command overrides normal protective switching mechanisms. Applying this command incorrectly can cause traffic outages.


Caution Traffic is not protected during a Force protection switch.


Step 1 From the View menu, choose Go to Network View.

Step 2 Click the Provisioning > BLSR tabs.

Step 3 Click Edit.

Step 4 To apply a Force switch to the west line:

a. Right-click the west BLSR port where you want to switch the BLSR traffic and choose Set West Protection Operation.


Note If node icons overlap, drag and drop the icons to a new location. You can also return to network view and change the positions of the network node icons, because BLSR node icons are based on the network view node icon positions.



Note For two-fiber BLSRs, the squares on the node icons represent the BLSR working and protect channels. You can right-click either channel. For four-fiber BLSRs, the squares represent ports. Right-click either working port.


b. In the Set West Protection Operation dialog box, choose FORCE RING from the drop-down menu. Click OK.

c. Click Yes in the two Confirm BLSR Operation dialog boxes that appear.

On the network graphic, an F appears on the working BLSR channel where you invoked the protection switch. The span lines change color to reflect the forced traffic. Green span lines indicate the new BLSR path, and the lines between the protection switch are purple.

Performing a Force switch generates several conditions including FORCED-REQ-RING, FORCED-REQ-RING, and WKSWPR.

Step 5 To apply a Force switch to the east line:

a. Right-click the east BLSR port and choose Set East Protection Operation.


Note If node icons overlap, drag and drop the icons to a new location or return to network view and change the positions of the network node icons, since BLSR node icons are based on the network view node icon positions.



Note For two-fiber BLSRs, the squares on the node icons represent the BLSR working and protect channels. You can right-click either channel. For four-fiber BLSRs, the squares represent ports. Right-click either working port.


b. In the Set East Protection Operation dialog box, choose FORCE RING from the drop-down menu. Click OK.

c. Click Yes in the two Confirm BLSR Operation dialog boxes that appear.

On the network graphic, an F appears on the working BLSR channel where you invoked the protection switch. The span lines change color to reflect the forced traffic. Green span lines indicate the new BLSR path, and the lines between the protection switch are purple.

Performing a Force switch generates several conditions including FORCED-REQ-RING, FORCED-REQ-RING, and WKSWPR.

Step 6 From the File menu, choose Close.

Step 7 Return to your originating procedure (NTP).


DLP-A194 Clear a BLSR Force Ring Switch

Purpose

This task removes a Force switch from a BLSR port.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Step 1 From the View menu, choose Go to Network View.

Step 2 Click the Provisioning > BLSR tabs.

Step 3 Click Edit.

Step 4 To clear a Force switch on the west line:

a. Right-click the BLSR west port where you want to clear the protection switch and choose Set West Protection Operation. Ports with a Force switch applied are marked with an F.

b. In the Set West Protection Operation dialog box, choose CLEAR from the drop-down menu. Click OK.

c. In the Confirm BLSR Operation dialog box, click Yes.

Step 5 To clear a Force switch on the east line:

a. Right-click the BLSR east port where you want to clear the protection switch and choose Set East Protection Operation. Ports with a Force switch applied are marked with an F.

b. In the Set East Protection Operation dialog box, choose CLEAR from the drop-down menu. Click OK.

c. In the Confirm BLSR Operation dialog box, click Yes.

On the BLSR network graphic, a green and a purple span line connects each node. This is the normal display for BLSRs when protection operations are not invoked.

Step 6 From the File menu, choose Close.

Step 7 Return to your originating procedure (NTP).


NTP-A213 Remove a BLSR Node

Purpose

This procedure removes a node from a BLSR.

Tools/Equipment

None

Prerequisite Procedures

A126 Create a BLSR

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



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. If you have questions, contact your next level of support. See "Obtaining Technical Assistance" section on page xlix.


Caution If you remove a node that is the only BITS timing source for the ring, you also remove the only source of synchronization for all the nodes in that ring. Circuits that connect to other networks which are synchronized to a Stratum 1 clock will experience a high level of pointer adjustments, which might adversely affect customer service.


Step 1 According to local site practice, complete the "NTP-A108 Back Up the Database" procedure on page 17-7 for all the nodes in the ring.

Step 2 Log into the node that you are going to remove from the BLSR. See the "DLP-A60 Log into CTC" task on page 3-26 for instructions.

Step 3 Complete the "DLP-A195 Verify Timing in a Reduced Ring" task.

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.

b. Click the Provisioning > BLSR tab, click the BLSR, then click Edit.

c. In the BLSR window, verify that all the port information is visible. If not, press Ctrl and drag the node icons to a new location so the information can be viewed.

d. From the File menu, choose Print.

e. Close the BLSR window by choosing Close from the File menu.

Step 5 Referring to the BLSR diagram, identify the following:

The node that is connected via its west port to the target (removal) node. For example, if you were removing Node 4 in Figure 16-3, Node 1 is the node connected via its west port to Node 4.

The node that is connected via its east port to the target (removal) node. In Figure 16-3, Node 3 is the node connected via its east port to Node 4.

Figure 16-3 Four-Node, Two-Fiber BLSR Before a Node Is Removed

Step 6 Complete the "DLP-A302 Check BLSR or Path Protection Alarms and Conditions" task to verify that the BLSR is free of alarms. If trouble is indicated (for example, a major alarm exists), resolve the problem before proceeding. See "Manage Alarms" or, if necessary, refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 7 From the View menu, choose Go to Other Node. Choose the node that you will remove and click OK.

Step 8 Click the Circuits tab. If the Scope setting is set to Network, choose Node from the Scope drop-down menu. Make sure the Filter button is off (not indented) to ensure that all circuits are visible.

Step 9 Delete all circuits that originate or terminate on the node. See the "NTP-A152 Delete Circuits" procedure on page 11-20.

Step 10 Complete the "DLP-A304 Verify BLSR and Path Protection Pass-Through Circuits" task to verify that circuits passing through the target node enter and exit the node on the same STS and/or VT.

Step 11 From the View menu, choose Go to Network View.

Step 12 Referring to the diagram created in Step 1, complete the "DLP-A303 Initiate a BLSR Force Ring Switch" task at each node that connects to the target (removal) node to force traffic away from it. You must perform a Force switch at each port connected to the target node. For example, in Figure 16-3, you would perform a Force switch on the east port of Node 3 and the west port of Node 1.

Step 13 Click the Alarms tab. If unexpected critical or major alarms are present, resolve them before you continue. If necessary, refer to the alarm troubleshooting procedures in the Cisco ONS 15454 Troubleshooting Guide.

Step 14 Remove the fiber connections between the node being removed and the two neighboring nodes.

Step 15 If the two nodes that will be connected after the BLSR node is removed have OC48AS trunk (span) cards and their K3 bytes were remapped, complete the "DLP-A304 Verify BLSR and Path Protection Pass-Through Circuits" task. If not, continue with Step 16.

Step 16 Reconnect the fiber of the two neighboring nodes directly, west port to east port. For example, in Figure 16-3, the east port of Node 3 (Slot 12) connects to the west port of Node 1 (Slot 5).

Step 17 If you do not plan to add the removed node to a BLSR in the future, complete the "DLP-A196 Delete a BLSR from a Single Node" task. If you will add the node to a BLSR in the future, go to Step 18.

Step 18 If you delete a node that was in a login node group, you will see incomplete circuits for that node in the CTC network view. (Although it is no longer part of the ring, the removed node still reports to CTC until it is no longer in a login node group.) Delete the node from the login node group:

a. From the CTC Edit menu, choose Preferences.

b. In the Preferences dialog box, click the Login Node Groups tab.

c. Click the login node group tab containing the node you want to remove.

d. Click the node you want to remove, then click Remove.

e. Click OK.

Step 19 Click the History tab. Verify that the BLSR_RESYNC condition appears for every node in the BLSR.

Step 20 Complete the "DLP-A194 Clear a BLSR Force Ring Switch" task to remove the Force protection switches.

Step 21 According to local site practice, complete the "A175 Two-Fiber BLSR Acceptance Test" procedure.

Stop. You have completed this procedure.


DLP-A195 Verify Timing in a Reduced Ring

Purpose

This task verifies timing in the ring where you removed a node.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite/remote

Security Level

Provisioning or higher



Step 1 Click the Provisioning > Timing tabs.

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 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. 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-A157 Change the Node Timing Source" task on page 12-24.

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 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-A157 Change the Node Timing Source" task on page 12-24.)


Note This type of timing conforms to Stratum 3 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 SONET links (east and west) as timing sources, traceable to the node with external BITS timing. See the "NTP-A28 Set Up Timing" procedure on page 4-21.

Step 6 Return to your originating procedure (NTP).


DLP-A304 Verify BLSR and Path Protection Pass-Through Circuits

Purpose

This task verifies that circuits passing through a BLSR or path protection node enter and exit the node on the same STS and/or VT. The task is performed prior to removal of the node from the BLSR or path protection.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Step 1 In the CTC Circuits window, choose a circuit that passes through the BLSR or path protection node that will be removed and click Edit.

Step 2 In the Edit Circuits window, check Show Detailed Map.

Step 3 Verify that the STS and VT mapping on the node's east and west ports are the same. For example, if the circuit mapping on the west port is s5/p1/S1 (Slot 5, Port 1, STS 1), verify that the mapping is STS 1 on the east port. If the circuit displays different STSs and/or VTs on the east and west ports, write down the name of the circuit. Figure 16-4 shows a circuit passing through a node (doc-124) on the same STS (STS 2).

Figure 16-4 Verifying Pass-Through STSs

Step 4 Repeat Steps 1 to 3 for each circuit in the Circuits tab.

Step 5 For each circuit recorded in Step 3 (circuits that entered/exited the node on a different STS/VT), complete the following steps:

a. Check the STS/VT availability from circuit source to destination to verify a path is available for the recreated circuit to pass through the node on the same STS/VT timeslot. For path protection configurations verify both a working and protect path from circuit source to destination.

b. Complete the "NTP-A152 Delete Circuits" procedure on page 11-20.

c. Create a new circuit. See Chapter 8, "Create Circuits and VT Tunnels."

d. Repeat Steps 1 through 3 to verify that the new circuit passes through the node on the same STS/VT.

Step 6 Return to your originating procedure (NTP).


DLP-A422 Verify BLSR Extension Byte Mapping

Purpose

This task verifies that the extension byte mapping is the same on BLSR trunk (span) cards that will be connected after a node is removed from a BLSR.

Tools/Equipment

OC48AS cards must be installed at one or both ends of the BLSR span that will be connected.

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Step 1 In network view, double-click a BLSR node with OC48AS trunk (span) cards that will be reconnected after a BLSR node removal.

Step 2 Double-click one OC48AS BLSR trunk card.

Step 3 Click the Provisioning > Line tab.

Step 4 Record on paper the byte in the BLSR Ext Byte column.

Step 5 Repeat Steps 2 and 4 for the second OC48AS trunk card

Step 6 If the node at the other end of the new span contains OC48AS trunk cards, repeat Steps 1 and 5 at the node. If it does not have OC48AS cards, their trunk cards are mapped to the K3 extension byte. Continue with Step 7.

Step 7 If the trunk cards on each end of the new span are mapped to the same BLSR extension byte, continue with Step 6. If they are not the same, remap the extension byte of the trunk cards at one of the nodes. See the "DLP-A89 Remap the K3 Byte" task.

Step 8 Return to your originating procedure (NTP).


DLP-A196 Delete a BLSR from a Single Node

Purpose

This task deletes a BLSR from a node after you remove the node from the BLSR.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Step 1 In node view, display the node that was removed from the BLSR.

Step 2 Click the Provisioning > BLSR tabs.

Step 3 Highlight the ring and click Delete.

Step 4 In the Suggestion dialog box, click OK.

Step 5 In the confirmation message, confirm that this is the ring you want to delete. If so, click Yes.

Step 6 Return to your originating procedure (NTP).


NTP-A105 Add a Path Protection Node

Purpose

This procedure adds a node to a path protection.

Tools/Equipment

None

Prerequisite Procedures

Cards must be installed and node turn-up procedures completed on the node that will be added to the path protection. See Chapter 2, "Install Cards and Fiber-Optic Cable," and Chapter 4, "Turn Up Node."

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



Step 1 According to local site practice, complete the "NTP-A108 Back Up the Database" procedure on page 17-7 for all the nodes in the ring.

Step 2 Log into an existing node in the path protection where you want to add a node. See the "DLP-A60 Log into CTC" task on page 3-26 for instructions. In order to have CTC visibility to the new node after it is added, you must be an authorized user on the node and you must have IP connectivity to the node.

Step 3 Complete the "DLP-A302 Check BLSR or Path Protection Alarms and Conditions" task to verify that the path protection is free of major alarms or problems. If trouble is indicated (for example, a major alarm exists), resolve the problem before proceeding. See "Manage Alarms" or, if necessary, refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 4 Verify the card installation on the new node. See the "NTP-A24 Verify Card Installation" procedure on page 4-2. Check that the OC-N cards that will serve as the path protection trunk (span) cards match the path protection optical rate of the trunk cards to which the new node will be connected. For example, if the adjacent nodes have OC-48 trunk cards, the new node must have OC-48 cards installed. If the OC-N cards are not installed or the rate does not match the rate of the adjacent node trunk cards, complete the "NTP-A16 Install the OC-N Cards" procedure on page 2-13 to install them.

Step 5 Verify that fiber is available to connect the new node to the existing nodes.

Step 6 Complete the "A35 Verify Node Turn Up" procedure.

Step 7 Determine if the following conditions are present.

The IP address for the new node is on the same subnet as other nodes in the network.

On the new node Provisioning > Network > General subtab, Craft Access Only is not checked under Gateway Settings.

A CTC computer is directly connected to the new node.

CTC computers are directly connected to other nodes on the same subnet.

If the conditions are not present, continue with Step 8. If conditions are present, complete the "DLP-A65 Create a Static Route" task on page 4-14 on the node that will be added to the path protection. Use the following settings:

Destination IP address: IP address of the CTC computer connected to the new node

Net Mask: 255.255.255.255

Next Hop: IP address of the Cisco ONS 15454

Cost: 1

To view Gateway Settings, see the "DLP-A249 Provision IP Settings" task on page 4-9.

Step 8 Click the Circuits tab. If any circuits on the path protection have a status of "Upgradable," complete the "NTP-A417 Upgrade TL1 Cross-Connects to CTC Circuits" procedure on page 11-19 to upgrade them.

Step 9 Log into the new node:

If the node has a LAN connection and appears on the network map, from the View menu, choose Go to Other Node, then enter the new node.

If the new node is not connected to the network, log into it using the "DLP-A60 Log into CTC" task on page 3-26.

Step 10 Click the Alarms tab. Verify that no critical or major alarms are present, nor any facility alarms, such as LOS, LOF, AIS-L, SF, and SD. If trouble is indicated (for example, a major alarm exists), resolve the problem before proceeding. See "Manage Alarms," or, if necessary, refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 11 (Optional) Create test circuits, making sure they pass through the path protection trunk cards, and run test traffic through the node to ensure that the cards are functioning properly. See the "NTP-A189 Create a Manually Routed OC-N Circuit" procedure on page 8-47 and the "NTP-A62 Test OC-N Circuits" procedure on page 8-55 for information.

Step 12 Create the DCC terminations on the new node. See the "DLP-A253 Provision SONET DCC Terminations" task.

Step 13 From the View menu, choose Go to Network View.

Step 14 Complete the "DLP-A197 Initiate a Path Protection Force Switch" task to switch traffic away from the span that will be broken to connect to the new node.


Caution Traffic is not protected during a protection switch.

Step 15 Two nodes will connect directly to the new node; remove their fiber connections:

a. Remove the east fiber connection from the node that will connect to the west port of the new node.

b. Remove the west fiber connection from the node that will connect to the east port of the new node.

Step 16 Replace the removed fibers with the fibers that are connected to the new node.

Step 17 Log out of CTC and log back into a node in the network.

Step 18 From the View menu, choose Go to Network View to display the path protection nodes. The new node should appear in the network map. Wait for a few minutes to allow all the nodes to appear.

Step 19 Click the Circuits tab and wait for all the circuits to appear, including spans. Count the number of incomplete circuits.

Step 20 In the network view, right-click the new node and choose Update Circuits With New Node from the shortcut menu. Wait for the confirmation dialog box to appear. Verify that the number of updated circuits in the dialog box is correct.


Note If the circuits take more than a minute to appear, log out, then log back in.


Step 21 Click the Circuits tab and verify that no incomplete circuits are present.

Step 22 Complete the "DLP-A198 Clear a Path Protection Force Switch" task to clear the protection switch.

Step 23 If you want to convert the circuits upgraded to CTC circuits in the Step 8 to TL1-like cross-connects, complete the "NTP-A416 Convert a CTC Circuit to TL1 Cross-Connects" procedure on page 11-18.

Step 24 According to local site practice, complete the "A177 Path Protection Acceptance Test" procedure.

Stop. You have completed this procedure.


DLP-A197 Initiate a Path Protection Force Switch

Purpose

This task switches all circuits on a path protection span to another span.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Caution The Force Switch Away command overrides normal protective switching mechanisms. Applying this command incorrectly can cause traffic outages.


Caution Traffic is not protected during a Force protection switch.


Step 1 From the View menu in the node view, choose Go to Network View.

Step 2 Right-click the span where you want to switch path protection traffic away. Choose Circuits from the shortcut menu.

Step 3 In the Circuits on Span dialog box, choose FORCE SWITCH AWAY. Click Apply.

Step 4 In the Confirm path protection Switch dialog box, click Yes.

Step 5 In the Protection Switch Result dialog box, click OK.

In the Circuits on Span window, the Switch State for all circuits is FORCE. Figure 16-5 shows an example.

Figure 16-5 Circuits on Span Dialog Box with a Force Switch


Note A Force switch request on a span or card causes CTC to raise a FORCED-REQ condition. The condition clears when you clear the Force switch.


Step 6 Return to your originating procedure (NTP).


DLP-A198 Clear a Path Protection Force Switch

Purpose

This task clears a path protection Force switch.

Tools/Equipment

None

Prerequisite Procedures

DLP-A60 Log into CTC, page 3-26

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher



Step 1 From the View menu at the node view, choose Go to Network View.

Step 2 Right-click the span where you want to clear the switch. Choose Circuits from the shortcut menu.

Step 3 In the Circuits on Span dialog box, choose CLEAR to remove the Force switch. Click Apply.

Step 4 In the Confirm Path Protection Switch dialog box, click Yes.

Step 5 In the Protection Switch Result dialog box, click OK.

In the Circuits on Span window, the Switch State for all path protection circuits is CLEAR.

Step 6 Return to your originating procedure (NTP).


NTP-A106 Remove a Path Protection Node

Purpose

This procedure removes a node from a path protection.

Tools/Equipment

None

Prerequisite Procedures

None

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher



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. If you have questions, contact your next level of support. See "Obtaining Technical Assistance" section on page xlix.


Caution If you remove a node that is the only BITS timing source for the ring, you also remove the only source of synchronization for all the nodes in that ring. Circuits that connect to other networks which are synchronized to a Stratum 1 clock will experience a high level of pointer adjustments, which might adversely affect customer service.


Step 1 Draw a diagram of the path protection where you will remove the node. In the diagram, identify the following:

The node that is connected through its west port to the node that will be removed.

The node that is connected through its east port to the node that will be removed.

Step 2 According to local site practice, complete the "NTP-A108 Back Up the Database" procedure on page 17-7 for all the nodes in the ring.

Step 3 Log into a node in the network where you want to remove a path protection node. See the "DLP-A60 Log into CTC" task on page 3-26 for instructions.

Step 4 Complete the "DLP-A302 Check BLSR or Path Protection Alarms and Conditions" task to verify that the path protection is free of alarms. If trouble is indicated (for example, a major alarm exists), resolve the problem before proceeding. See "Manage Alarms" or, if necessary, refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 5 Complete the "NTP-A152 Delete Circuits" procedure on page 11-20 for circuits that originate or terminate in the node you will remove. (If a circuit has multiple drops, delete only the drops that terminate on the node you are deleting.

Step 6 Complete the "DLP-A304 Verify BLSR and Path Protection Pass-Through Circuits" task to verify that circuits passing through the target node enter and exit the node on the same STS and/or VT.

Step 7 Complete the "DLP-A197 Initiate a Path Protection Force Switch" task for all spans connected to the node you are removing.


Caution Traffic is not protected during a Force protection switch.

Step 8 Remove all fiber connections between the node being removed and the two neighboring nodes.

Step 9 Reconnect the fiber of the two neighboring nodes directly, west port to east port.


Note If you delete a node that was in a login node group, you will see incomplete circuits for that node in CTC network view. (Although it is no longer part of the ring, the removed node still reports to CTC until it is no longer in a login node group.)


Step 10 Exit CTC and log back in. See the "DLP-A60 Log into CTC" task on page 3-26 for instructions.

Step 11 Log into each newly connected node and click the Alarms tab. Verify that the span cards are free of alarms. Resolve any alarms before proceeding. Refer to the Cisco ONS 15454 Troubleshooting Guide.

Step 12 Complete the "DLP-A195 Verify Timing in a Reduced Ring" task.

Step 13 Complete the "DLP-A198 Clear a Path Protection Force Switch" task to clear the protection switch.

Step 14 Click the Circuits tab and verify that no incomplete circuits are present.

Step 15 Complete the "A177 Path Protection Acceptance Test" procedure.

Stop. You have completed this procedure.