5.2.1 Dynamic Reconfiguration With Public Network Interfaces

There are a few issues you must consider when completing dynamic reconfiguration (DR) operations on public network interfaces in a cluster.

• All of the requirements, procedures, and restrictions that are documented for the Solaris 8 DR feature also apply to Sun Cluster DR support (except for the operating environment quiescence operation). Therefore, review the documentation for the Solaris 8 DR feature before using the DR feature with Sun Cluster software. You should review in particular the issues that affect non-network IO devices during a DR detach operation.

• DR remove operations can be performed on public network interfaces that are not active. Any active public network interface must first be removed from active status in a NAFO group.

• When an interface is replaced on the private interconnect, its state remains the same, avoiding any need for additional Sun Cluster reconfiguration steps.

• If you try to remove a public network interface card without having properly disabled it as the active network adapter, the system rejects the operation and identifies the interface that would be affected by the operation.

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Caution -

If the active network adapter fails while you are performing the DR remove operation on the disabled network adapter, availability is impacted. The active adapter has no place to fail over for the duration of the DR operation.

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Complete the following procedures in the order indicated when performing DR operations on public network interfaces.

Table 5-4 Task Map: Dynamic Reconfiguration with Public Network Interfaces

Task	For Instructions, Go To...
1. Switch the active adapter to be a backup adapter, so it can be removed from the NAFO group.	"5.2.6 How to Switch a NAFO Group's Active Adapter"
2. Remove the adapter from the NAFO group.	"5.2.5 How to Remove an Adapter From a NAFO Group"
3. Perform the DR operation on the public network interface.	Sun Enterprise 10000 Dynamic Reconfiguration User Guide and the Sun Enterprise 10000 Dynamic Reconfiguration Reference Manual (from the Solaris 8 on Sun Hardware collection)