In-Service Upgrades

This section explains the procedures and contingencies for adding components to an active multi-node or single-chassis CSP.

Adding an EXNET® Ring to Stand-alone Chassis

You can create a multi-node CSP from two or more stand-alone CSPs by adding EXNET® hardware to each node without affecting existing calls on any nodes.

1. Add EXNET® hardware to each node

• EXNET-ONE

• Fiber optic cable

2. Assign Logical Node IDs to each node (Assign Logical Node ID)

3. Configure the EXNET® ring (EXNET Ring Configure)

• Assign Logical Ring ID to each node

• Configure Transmit/Receive Mode of each node

4. Bring the ring in service (Service State Configure)

• This message only needs to be sent to one node to bring the entire ring in service

Calls can now be connected across nodes.

Adding a Node

The procedure for adding a node is the same for a redundant or non-redundant EXNET® ring configuration. However, adding a node to a non-redundant ring configuration causes some inter-nodal calls to purge while the ring resets.

See also Adding a Node to a Multi-Node System (7-60) in the EXS SwitchKit Converged Services Administrator (CSA) User’s Guide for instructions on completing this procedure with CSA.

Adding a Node to a Non-redundant EXNET® Ring

Follow the steps below to add a node to a non-redundant ring configuration. This procedure assumes the configuration explained in the section Configure Transmit/Receive Mode. For this example, assume that the EXNET® ring is assigned Logical Ring ID 1.

1. Disconnect the EXNET® ring where necessary.

2. Disconnect the fiber optic cable from the EXNET B port of the node that will be adjacent to the new node. The system is placed in loopback mode and all connections are maintained.

3. Make the EXNET® connections to the new node.

4. Configure the node as follows:

• Establish the Ethernet connection.

• Download the system software.

• Re-establish the socket connection.

• Assign Logical Node ID.

• Configure CSP options on the node, if necessary (EXS Node Configure).

• Assign Logical Ring ID 1 to the ring (EXNET Ring Configure).

5. Configure the Transmit/Receive Mode of the ring (EXNET Ring Configure).

When the Transmit/Receive Mode is configured, the EXNET ring resets and comes back in service. All inter-nodal calls are purged during the reset.

Adding a Node to a Redundant EXNET® Ring

Follow the steps below to add a node to a redundant ring configuration. This procedure assumes the configuration shown in Adding a Node to an EXNET® Ring. For this example, assume that the EXNET® rings are assigned Logical Ring IDs 1 and 2.

1. Disconnect the EXNET® ring where necessary: Disconnect the fiber optic cable from the EXNET B port of the EXNET-ONE cards in the node that will be adjacent to the new node (both Ring 1 and Ring 2). Both rings are placed in loopback mode and all connections are maintained.

2. Make the EXNET® connections to the new node for both rings

3. Configure Node

• Establish the Ethernet connection

• Download the system software

• Re-establish the socket connection

• Assign the Logical Node ID

• Configure CSP options on the node, if necessary (EXS Node Configure)

4. Configure Ring 1

• Assign Logical Ring ID 1 to the EXNET-ONE that is attached to Ring 1 (EXNET Ring Configure)

• Configure the Transmit/Receive Mode of Ring 1 (EXNET Ring Configure)

Ring 1 resets and comes in service with the new node attached. All inter-nodal calls are maintained on Ring 2 while Ring 1 is resetting.

5. Configure Ring 2

• Assign Logical Ring ID 2 to the EXNET-ONE that is attached to Ring 2
(EXNET Ring Configure).

• Configure the Transmit/Receive Mode of Ring 2 (EXNET Ring Configure). Ring 2 resets and comes in service with the new node attached. All inter-nodal calls are maintained on Ring 1 while Ring 2 is resetting.

Figure 10-11 Adding a Node to an EXNET® Ring