Add and Remove Nodes

This chapter explains how to add and remove Cisco ONS 15310-CL or Cisco ONS 15310-MA nodes from path protection configurations and linear add-drop multiplexers.

Before You Begin

Before performing any of the following procedures, complete the "NTP-C56 Document Existing Provisioning" procedure. Also investigate all alarms and clear any trouble conditions. Refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide as necessary.

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

1. C97 Add a Path Protection Node—Complete as needed.

2. C98 Remove a Path Protection Node—Complete as needed.

3. C99 Add an End Node to a Linear ADM—Complete as needed.

4. C135 Add a Non-ONS 15310-CL Node to a Linear ADM—Complete as needed to add an ONS 15600, ONS 15454, or ONS 15310-MA node to a linear configuration where an ONS 15310-CL or ONS15310-MA is an end node.

5. C101 Remove an In-Service Node from a Linear ADM—Complete as needed to remove an node from a linear ADM without disrupting traffic.

NTP-C97 Add a Path Protection Node

Purpose

This procedure adds a node to a path protection configuration.

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 configuration. See Chapter 1 "Install the Cisco ONS 15310-CL," or Chapter 2 "Install the Cisco ONS 15310-MA," and Chapter 4 "Turn Up a Node."

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Superuser only


Step 1 According to local site practice, complete the "NTP-C102 Back Up the Database" procedure for all the nodes in the ring.

Step 2 Verify the card installation on the new node. See the "NTP-C18 Verify Ethernet Card and SFP Installation for the ONS 15310-CL" procedure.

Note In Cisco Transport Controller (CTC), SFPs are called pluggable port modules (PPMs).

Step 3 Verify that the OC-N ports (or cards in non-310 nodes) that will serve as the path protection trunk (span) ports 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-12 ports, the new node must have OC-12 ports.

Step 4 Verify that fiber is available to connect the new node to the existing nodes.

Step 5 Complete the "NTP-C26 Verify Node Turn-Up" procedure.

Step 6 Log into a node in the path protection configuration where you want to add a node. See the "DLP-C29 Log into CTC" task 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 7 Complete the "DLP-C163 Check the Network for Alarms and Conditions" task to verify that the path protection configuration is free of major alarms or problems. If trouble is indicated (for example, a major alarm exists), resolve the problem before proceeding. See Chapter 9 "Manage Alarms" or, if necessary, refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide.

Step 8 Count the total number of circuits on the fiber that is cut between the existing nodes. To count the number of circuits, right click on the fiber that is cut, and click circuits.

Step 9 In network view, click the Circuits tab.

To view Partial circuits, click the Filter button and select PARTIAL from the Status drop-down list. The Partial circuits, if any, are displayed.

To view Partial_TL1 circuits, click the Filter button and select PARTIAL_TL1 from the Status drop-down list. The Partial_TL1 circuits, if any, are displayed.

Resolve any partial circuits (both Partial and Partial_TL1) in the network before proceeding. However, if you want to continue with Step 10, match the number of partial circuits and circuit names that existed before and after adding a path protection node. This ensures that no additional partial circuits are created after this procedure is completed.

Step 10 Log into the new node:

•If the node has a LAN connection and does not appear on the network map, from the File menu, choose Add Node, then enter the IP address or the DNS name of the new node and click OK. Wait for the new node to initialize and appear on the network map. Proceed to the next bullet point.

•If the node has a LAN connection and appears on the network map, from the View menu, choose Go to Other Node, then choose the new node from the Select Node to Go to drop-down list on the Select Node dialog box and click OK.

•If the new node is not connected to the network, log into it directly using the "DLP-C29 Log into CTC" task.

Step 11 Click the Alarms tab.

a. Verify that the alarm filter is not on. See the "DLP-C88 Disable Alarm Filtering" task as necessary.

b. 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 Chapter 9 "Manage Alarms" or, if necessary, refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide.

Step 12 In network view, click the Circuits tab.

To view Partial circuits, click the Filter button and select PARTIAL from the Status drop-down list. The Partial circuits, if any, are displayed.

To view Partial_TL1 circuits, click the Filter button and select PARTIAL_TL1 from the Status drop-down list. The Partial_TL1 circuits, if any, are displayed.

Resolve any partial circuits (both Partial and Partial_TL1) in the network before proceeding. However, if you want to continue with Step 13, match the number of partial circuits and circuit names that existed before and after adding a path protection node. This ensures that no additional partial circuits are created after this procedure is completed.

Step 13 Complete the following steps if the node is on the same subnet as other path protection nodes, it is not provisioned as an ENE (see the "NTP-C21 Set Up CTC Network Access" procedure), and a CTC computer will directly connect to the node while other CTC computers are directly connected to other path protection nodes. If not, continue with Step 14.

a. Click the Provisioning > Network > General tabs. View the IP Address and Net/Subnet Mask Length fields to verify the node is on the same subnet as other path protection nodes.

b. Click the Static Routing tab and click Create.

c. In the Create Static Route dialog box, enter the following settings:

•Destination IP address: Local-PC-IP-address

•Net Mask: 255.255.255.255

•Next Hop: IP-address-of-the-Cisco-ONS-15310-CL or MA

•Cost: 1

d. Click OK.

Step 14 (Optional) Create test circuits, making sure they pass through the path protection line ports, and run test traffic through the node to ensure the ports are functioning properly. See the "NTP-C48 Create a Manually Routed Optical Circuit" procedure and the "NTP-C50 Test Optical Circuits" procedure for information.

Step 15 Create the DCC terminations on the new node. See the "DLP-C52 Provision Section DCC Terminations" task.

Step 16 From the View menu, choose Go to Network View.

Step 17 Complete the "DLP-C166 Initiate a Path Protection Force Switch on a Span" task to switch traffic away from the span that will be broken to connect to the new node.

Step 18 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 19 Replace the removed fibers with the fibers that are connected to the new node.

Step 20 Log out of CTC and log back into a node in the network.

Step 21 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 22 Click the Circuits tab and wait for all the circuits to appear, including spans. Count the number of partial circuits.

Step 23 Ensure that nodes involved in the node addition operation are in the initialized state. This is because, CTC does not consider nodes that are not initialized (they appear as gray icons in the CTC network map) when evaluating the circuits.

Note Step 24 is recommended to be performed only on nodes (the newly added node, and the existing two nodes in the network between which the new node is added) involved in the node addition operation. Disable network discovery while launching CTC, add only those nodes involved in the node addition operation.

Note CTC automatically creates VT Tunnels. The cross connects should not be created manually in the intermediate nodes.

Note Step 24 does not create the overlay ring circuits that route traffic around multiple rings passing through one or more nodes more than once, on the new node.

Step 24 In the network view, right-click the new node and choose Update Circuits With New Node from the list of options. Wait for the confirmation dialog box to appear. Verify that the number of updated circuits in the dialog box is correct (the circuit count should be same as obtained in Step 8).

Step 25 Click the Circuits tab and verify that no partial circuits appear. However, if the partial circuits still exist in the network, verify whether they were present in Step 9 and Step 12. This will ensure that no additional partial circuits are created by this procedure.

Step 26 Complete the "DLP-C167 Clear a Path Protection Force Switch" task.

Step 27 (Optional) Complete the "NTP-C32 Path Protection Acceptance Test" procedure.

Stop. You have completed this procedure.

NTP-C98 Remove a Path Protection Node

Purpose

This procedure removes a node from a path protection configuration.

Tools/Equipment

None

Prerequisite Procedures

C102 Back Up the Database

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher


Caution The following procedure minimizes traffic outages during node removals.
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 configuration 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 target node)

•The node that is connected through its east port to the target node

Step 2 Log into a node in the network where you want to remove a path protection node. See the "DLP-C29 Log into CTC" task for instructions.

Step 3 Complete the "DLP-C163 Check the Network for Alarms and Conditions" task to verify that the path protection configuration is free of alarms. If trouble is indicated (for example, a major alarm exists), resolve the problem before proceeding. See Chapter 9 "Manage Alarms" or, if necessary, refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide.

Step 4 Complete the "DLP-C115 Delete Circuits" task for circuits that originate or terminate in the target node. (If a circuit has multiple drops, delete only the drops that terminate on the node you are deleting.)

Step 5 Complete the "DLP-C168 Verify Pass-Through Circuits" task to verify that circuits passing through the target node enter and exit the node on the same STS or VT.

Step 6 Complete the "DLP-C166 Initiate a Path Protection Force Switch on a Span" task for all spans connected to the node you are removing.

Step 7 Remove all fiber connections between the target node and the two neighboring nodes.

Step 8 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 partial 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 9 Exit CTC and log back in. See the "DLP-C29 Log into CTC" task for instructions.

Step 10 Log into each newly connected node and open the Alarms tab.

a. Verify that the alarm filter is not on. See the "DLP-C88 Disable Alarm Filtering" task as necessary.

b. Verify that the trunk cards/ports are free of alarms. Resolve any alarms before proceeding. Refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide.

Step 11 Complete the "DLP-C140 Verify Timing in a Reduced Ring" task.

Step 12 Complete the "DLP-C167 Clear a Path Protection Force Switch" task.

Step 13 Click the Circuits tab and verify that no partial circuits are present.

Step 14 (Optional) Complete the "NTP-C32 Path Protection Acceptance Test" procedure.

Stop. You have completed this procedure.

NTP-C99 Add an End Node to a Linear ADM

Purpose

This procedure adds a single ONS 15310-CL node or ONS 15310-MA to the end of an ONS 15310 linear add-drop multiplexer (ADM) network. To add a non-ONS 15310-CL node in the middle of a linear ADM, use the "NTP-C135 Add a Non-ONS 15310-CL Node to a Linear ADM" procedure.

Tools/Equipment

None

Prerequisite Procedures

C29 Provision a Linear ADM Network

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 for the ONS 15310-CL, or Table 2-1 for the ONS 15310-MA.

Note In a linear ADM configuration, two OC-N ports in 1+1 protection are connected to two OC-N ports in 1+1 protection on a second node. On the second node, two more OC-N ports are connected to a third node. The third node can be connected to a fourth node, and so on, depending on the number of nodes in the linear ADM. The ONS 15310-CL has only two optical ports. This restricts an ONS 15310-CL to being the end node in a linear ADM network since both ports are necessary to create the 1+1 protection group to the neighbor node. The ONS 15310-MA has four optical ports and can be added as an end node or in the middle of a linear ADM.

Note The two optical ports on the ONS 15310-CL are present on Slot 2 of the chassis. The two optical ports on the ONS 15310-MA are present on either Slot 3 or Slot 4 of the chassis. Other ONS 15xxx platforms do not allow a 1+1 protection group to be created if the working and protect ports are on the same slot. This restriction is not applicable to the ONS 15310-CL because it only has optical ports on Slot 2. Any of these ports (Slot 2, Port 1-1 or slot 2, Port 2-1 for the ONS 15310-CL or Slot 3, Port 1-1 or Port 2-1 or Slot 4, Port 1-1 or Port 2-1 for the ONS 15310-MA) can be designated as the working port, depending on your configuration and fiber connections.

Caution If the linear ADM carries traffic, you cannot add a node between two linear nodes unless you delete and recreate the circuits. Use this procedure to add a node to the end of the linear ADM.

Step 1 According to local site practice, complete the "NTP-C102 Back Up the Database" procedure for all the nodes in the ring.

Step 2 At the new node, complete one of the following procedures:

•If the node has not been turned up, complete all procedures in Chapter 4 "Turn Up a Node."

•If the node has been turned up, complete the "NTP-C26 Verify Node Turn-Up" procedure.

Step 3 Verify that the new node has two available optical ports with the same rate as the linear ADM. If the optical ports are not installed, complete the "DLP-C16 Install SFP Connectors" task. If the optical ports have different line rates, complete the "DLP-C194 Change the Optical Line Rate" task.

Step 4 For the ONS 15310-CL, complete "NTP-C141 Create Optical Protection Groups for the ONS 15310-CL" procedure for the two OC-N ports that will connect to the linear ADM node.

Step 5 For the ONS 15310-MA, complete "NTP-C142 Create Protection Groups for the ONS 15310-MA" procedure for the two OC-N ports that will connect to the linear ADM node.

Step 6 Complete the "DLP-C52 Provision Section DCC Terminations" task for the working OC-N port at the new node. Make sure to set the Port State in the Create SDCC Termination dialog box to IS. (Do not create a DCC termination on the protect port.)

Note DCC failure alarms appear after you create DCC terminations in the linear ADM node until you connect the fiber during Step 14.

Step 7 Complete the "DLP-C29 Log into CTC" task at the linear ADM node that will connect to the new node. If you are already logged in, continue with Step 8.

Step 8 Complete the "DLP-C163 Check the Network for Alarms and Conditions" task.

Step 9 Install the OC-N port that will connect to the new node. See "DLP-C16 Install SFP Connectors" task. If the ports are already installed, continue with Step 10.

Note If the new node is not an ONS 15310-CL or ONS 15310-MA, refer to the corresponding user documentation for installation procedures.

Step 10 Connect the working port at the existing linear ADM node to the working port at the new node. See "DLP-C18 Install Fiber-Optic Cables in a 1+1 Configuration" task.

Step 11 Connect the protect port at the existing linear ADM node to the protect port at the new node.

Step 12 Complete "NTP-C141 Create Optical Protection Groups for the ONS 15310-CL" procedure for the two OC-N ports that connect to the new node.

Step 13 Complete the "NTP-C142 Create Protection Groups for the ONS 15310-MA" procedure for the two OC-N ports that connect to the new node.

Step 14 Complete the "DLP-C52 Provision Section DCC Terminations" task for the working OC-N port that connects to the working port on the new node. Make sure to set the Port State in the Create SDCC Termination dialog box to IS. (Do not create a DCC termination for the protect port.)

Step 15 From the View menu, choose Go to Network View. Verify that the newly created linear ADM configuration is correct. A green span line should appear between each linear node.

Step 16 Complete the "DLP-C163 Check the Network for Alarms and Conditions" task to verify that no unexpected alarms or conditions are present.

Stop. You have completed this procedure.

NTP-C135 Add a Non-ONS 15310-CL Node to a Linear ADM

Purpose

This procedure adds an ONS 15600, ONS 15454, or ONS 15310-MA between two nodes in a 1+1 configuration. Because the ONS 15310-CL has only two optical ports, it cannot be added as a middle node. The ONS 15310-MA has four optical ports and therefore does not have this restriction.

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 15310-CL or ONS 15310-MA nodes 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 Optical transmit and receive levels should be in their acceptable range as shown in the specifications section for each card in Table 1-1 for the ONS 15310-CL, or Table 2-1 for the ONS 15310-MA.

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-C29 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 Select 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 group and no communications channel has been provisioned on these four ports.

Note The ONS 15310-CL has two optical ports and therefore cannot be added in between two other nodes. It can only be configured as an end node in a linear ADM. The ONS 15310-MA has four optical ports and therefore does not have this restriction.

•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 into the unreachable node using a separate CTC session and configure that node.

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 Select 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.

Step 9 Follow the instructions in the dialog box for connecting the fibers between the nodes.

Step 10 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 the Yes button if you want to cancel the Upgrade Protection 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 11 Click Next on the Update Circuit(s) on Node-Name dialog box.

The Force Traffic to Protect Path dialog box appears. This dialog box states that it is about to force the traffic from the working to protect path for the terminal nodes.

Step 12 When you are ready to proceed, click Next.

Step 13 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. The final dialog box informs you when you have completed the procedure.

Step 14 Click Finish.

Stop. You have completed this procedure.

NTP-C101 Remove an In-Service Node from a Linear ADM

Purpose

This procedure removes a single ONS 15600, ONS 15454, pr ONS 15310-MA node from a linear ADM that contains an ONS 15310-CL or an ONS 15310-MA as an end node(s).

Tools/Equipment

None

Prerequisite Procedures

C29 Provision a Linear ADM Network

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

Provisioning or higher


Note The 1+1 protection group must be unidirectional in order to delete a node from a linear ADM. If your 1+1 protection group is bidirectional, see the "DLP-C137 Modify a 1+1 Protection Group" task to change it to unidirectional. After you have removed the node from the linear group you can then change the protection setting back to bidirectional.

Step 1 Complete the "DLP-C29 Log into CTC" task at a node in the network where you will remove the node.

Step 2 From the View menu, choose Go to Network View.

Step 3 Click the Alarms tab.

a. Verify that the alarm filter is not on. See the "DLP-C88 Disable Alarm Filtering" task as necessary.

b. Verify that no unexplained alarms appear on the network. If unexplained alarms appear, resolve them before continuing. Refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide if necessary.

Step 4 Click the Conditions tab. Verify that no unexplained conditions appear on the network. If unexplained conditions appear, resolve them before continuing. Refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide if necessary.

Step 5 On the network map, double-click a node in the 1+1 protection group that is adjacent to the node you intend to remove (the target node).

Step 6 In node view, click the Maintenance > Protection tabs.

Step 7 Initiate a Force switch on the working port:

a. In the Protection Groups area, click the 1+1 protection group.

b. In the Selected Group area, click the working port.

c. Next to Switch Commands, click Force.

d. In the Confirm Force Operation dialog box, click Yes.

e. In the Selected Group area, verify that the following appears:

•Protect port - Protect/Active [FORCE_SWITCH_TO_PROTECT], [PORT STATE]

•Working port - Working/Standby [FORCE_SWITCH_TO_PROTECT], [PORT STATE]

Step 8 Repeat Step 5 through Step 7 for the node that is connected directly to the other side of the target node.

Step 9 Remove the fiber from the working ports of the target node.

Step 10 Connect the fiber between the working ports of the two nodes that were directly connected to either side of the target node.

Step 11 On the node where you initiated a Force switch in Step 8, clear the switch:

a. Next to Switch Commands, click Clear.

b. In the Confirm Clear Operation dialog box, click Yes.

Step 12 Initiate a Force switch on the protect port:

a. In the Selected Group area, click the protect port. Next to Switch Commands, click Force.

b. In the Confirm Force Operation dialog box, click Yes.

c. In the Selected Group area, verify that the following appears:

•Protect port - Protect/Standby [FORCE_SWITCH_TO_WORKING], [PORT STATE]

•Working port - Working/Active [FORCE_SWITCH_TO_WORKING], [PORT STATE]

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

Step 14 On the network map, double-click the other node where you initiated a Force switch.

Step 15 In node view, click the Maintenance > Protection tabs.

Step 16 Clear the Force switch on the working port:

a. In the Protection Groups area, click the 1+1 protection group.

b. In the Selected Group area, click the working port.

c. Next to Switch Commands, click Clear.

d. In the Confirm Clear Operation dialog box, click Yes.

Step 17 Complete Step 12 to initiate a Force switch on the protect port.

Step 18 Remove the fiber from protect ports of the target node.

Step 19 Connect the fiber between the protect ports of the two nodes on each side of the target node.

Step 20 Clear the Force switch:

a. Next to Switch Commands, click Clear.

b. In the Confirm Clear Operation dialog box, click Yes.

c. In the Selected Group area, verify the following states:

•Protect port - Protect/Standby

•Working port - Working/Active

Step 21 Repeat Step 13 through Step 16 to clear the switch on the other node.

Step 22 Exit CTC.

Step 23 Relaunch CTC at any one of the nodes that were adjacent to the target node. The nodes will now show the circuit status as DISCOVERED when checked.

Stop. You have completed this procedure.