ServerNet Cluster Manual

Adding or Removing a Node
ServerNet Cluster Manual—520575-003
6-6
Moving ServerNet Cables to Different Ports on the
ServerNet II Switches
To move the fiber-optic cables at the ServerNet II Switches:
1. Make sure an unused port in the range 0 through 7 is available on the X-fabric and
Y-fabric ServerNet II Switches. You must use the same port number on both
switches.
2. Complete the Planning Form for Moving ServerNet Cables. See the Sample
Planning Form for Moving ServerNet Cables on page 6-9. A blank copy of this form
is included in Appendix B, Blank Planning Forms. To complete the form:
a. Record the system name and Expand node number of the node whose
ServerNet cables will be moved. You can use the TSM Service Application to
collect this information.
b. Record the old and new ServerNet II Switch port connections.
c. For the node whose ServerNet cables will be moved, list the Expand-over-
ServerNet lines that must be aborted before removing the node from the
cluster. You can use the Expand subsystem SCF LISTDEV command to
identify the currently configured Expand-over-ServerNet lines:
-> LISTDEV TYPE 63, 4
d. For all other nodes in the cluster, list the Expand-over-ServerNet line that must
be aborted for the node being removed. You can use the SCF INFO
PROCESS $NCP, LINESET command to identify the line configured for a
specific node:
-> INFO PROCESS $NCP, LINESET
3. If your applications might be affected and an adequate alternate Expand line is not
available, shut down all applications that depend on the Expand-over-ServerNet
line-handler processes.
4. Identify and label the cables you want to move to the unused ports. Labeling the
cables reduces the likelihood of moving the wrong cables.
5. Use the following commands to remove the ServerNet node (the node whose
cables will change ports) temporarily from the ServerNet cluster:
a. On the node being removed, use the Expand subsystem SCF ABORT LINE
command to abort the Expand-over-ServerNet lines to all other nodes in the
cluster. For example:
-> ABORT LINE $SC012
-> ABORT LINE $SC013
-> ABORT LINE $SC014
-> ABORT LINE $SC015
-> ABORT LINE $SC016
-> ABORT LINE $SC017
Note. You do not have to stop or delete the line-handler processes (devices).