Prerequisites To Replacing A Csm; Replacing A Csm In The Same Slot - Cisco MDS 9216 Configuration Manual

Replacing CSMs

Prerequisites to Replacing a CSM

Use the show nodes local and show interface svc slot/node commands to obtain the following
Step 1
information for each of the nodes in the CSM:
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Document this information in an easily accessible location—you will be using this information to
upgrade the software after replacing a CSM.
Verify that the node is not functional.
Step 2
Verify that the other node in its I/O group is operational before deleting this node.
Step 3
Delete the nodes to be replaced from their cluster(s).
Step 4

Replacing a CSM in the Same Slot

If a CSM is replaced by another CSM in the same slot in any switch in the Cisco MDS 9500 Series or in
a Cisco MDS 9216 Switch, the same nWWNs and pWWNs are automatically assigned for both interfaces
on the new CSM. No further configuration is required.
If the replacement nodes are assigned the same nWWNs and pWWNs as the replaced nodes, be sure to
Caution
assign the nodes to the same I/O group and cluster as before. Otherwise, data corruption may occur. If
the information on which I/O group and cluster the previous nodes were part of is not available, contact
your reseller (if applicable) or customer service for assistance.
If a CSM is replaced by another CSM in the same slot on the same chassis, and you do not wish to retain
the same nWWNs and pWWNs, follow this process.
Remove the CSM from the slot as directed in the Cisco MDS 9216 Switch or the Cisco MDS 9500 Series
Step 1
Hardware Installation Guide.
Use the svc purge-wwn module command to erase the nWWNs and pWWNs from the original slot.
Step 2
Issue the command after the module has been removed or when it is in the powered-down state.
switch# svc purge-wwn module <slot-num>
Cisco MDS 9000 Family SAN Volume Controller Configuration Guide
8-10
The slot number in which the CSM is located
The node number within the CSM (1 or 2)
The node name—If the default name was used, then you cannot keep the same node name.
The cluster (name) to which this node belongs
The I/O group to which this node belongs
The applicable nWWN and pWWNs.
The current software version on the node
Chapter 8 Upgrading CSM Software
78-16119-01, Cisco MDS SAN-OS Release 1.3