ServerNet Cluster 6780 Planning and Installation Guide (G06.24+, H06.03+)

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Changing a ServerNet Cluster

ServerNet Cluster 6780 Planning and Installation Guide—527301-004

9-4

Removing Switches From a ServerNet Cluster

Removing a zone or layer of switches:

•

Can be done online

•

Does not change the topology

•

Does not change the ServerNet node numbers that remain in the ServerNet cluster

To remove a zone or layer of switches:

1. Select the zone or layer to be removed. You can select the zone or layer with the

fewest number of nodes or one that is least critical to your application.

2. Use the Expand Lines Form on page B-9 to record information about the lines that

must be stopped.

3. Check that the ServerNet cluster is operating normally on both fabrics. Resolve

any problems before you proceed.

4. Perform the Update Topology action. Refer to Update Topology Action on

page 9-2. This action disables OSM alarms.

5. Shut down applications that depend on ServerNet connectivity to the nodes and

from the nodes on the zone or layer to be removed.

6. In all nodes of the zone or layer you plan to remove, stop Expand connectivity to

the nodes in the other zones or layers. Refer to Stopping Expand-Over-ServerNet

Lines on page 11-3.

7. In all other ServerNet nodes, stop Expand connectivity to the nodes of the zone or

layer you are removing. Refer to Stopping Expand-Over-ServerNet Lines on

page 11-3.

8. In all nodes of the zone or layer you plan to remove, stop the ServerNet Cluster

Subsystem. Refer to Stopping the ServerNet Cluster Subsystem on page 11-2.

9. Disconnect either the zone cables or layer cables to the zone or layer being

removed on both fabrics. You must disconnect the cables from both sides before

proceeding to the next step. Otherwise, errors can occur.

10. If you removed zone 3, connect the zone cables you removed from zone 3

between zones 1 and 2. For more information, refer to Zone Cable Connections on

page 6-10. If you removed zone 1 or 2, connecting these cables between zone 1

and 3 or between zone 2 and 3 is not supported.

11. Use the OSM Service Connection to enable the OSM alarms suppressed by the

Update Topology action:

a. Right-click ServerNet Cluster, and select Actions.

b. From the Available Actions drop-down list, select Reanalyze.

c. Click Perform action.