Dynamic Reconfiguration With Public Network Interfaces

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You must consider a few issues 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 Oracle Solaris dynamic reconfiguration feature also apply to Oracle Solaris Cluster dynamic reconfiguration support (except for the operating system quiescence operation). Therefore, review the documentation for the Oracle Solaris dynamic reconfiguration feature before using the dynamic reconfiguration feature with Oracle Solaris Cluster software. You should review in particular the issues that affect non-network IO devices during a dynamic reconfiguration detach operation.
Dynamic reconfiguration remove-board operations can succeed only when public network interfaces are not active. Before removing an active public network interface, switch the IP addresses from the adapter to be removed to another adapter in the multipathing group, using the if_mpadm command. For more information, see the if_mpadm (1M) man page.
If you try to remove a public network interface card without having properly disabled it as an active network interface, Oracle Solaris Cluster rejects the operation and identifies the interface that would be affected by the operation.

Caution - For multipathing groups with two adapters, if the remaining network adapter fails while you are performing the dynamic reconfiguration remove operation on the disabled network adapter, availability is impacted. The remaining adapter has no place to fail over for the duration of the dynamic reconfiguration operation.

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

Table 7-4 Task Map: Dynamic Reconfiguration With Public Network Interfaces

Task	Instructions
1. Switch the IP addresses from the adapter to be removed to another adapter in the multipathing group, using the `if_mpadm` command	`if_mpadm`(1M) man page. How to Move an Interface From One IPMP Group to Another IPMP Group in Administering TCP/IP Networks, IPMP, and IP Tunnels in Oracle Solaris 11.2
2. Remove the adapter from the multipathing group by using the `ipadm` command	`ipadm`(1M) man page How to Remove an Interface From an IPMP Group in Administering TCP/IP Networks, IPMP, and IP Tunnels in Oracle Solaris 11.2
3. Perform the dynamic reconfiguration operation on the public network interface