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Types of failover policies

LIF failover policies are used to restrict the list of ports within a failover group that will be available as failover targets for a LIF. You need to understand how the type of failover policy you apply to LIFs affects the target ports that are available from the failover group.

When configuring a LIF using the network interface create or network interface modify command, the values specified for the -failover-group and -failover-policy parameters determine the failover behavior of the LIF.

In many cases you can accept the default values for both of these failover parameters. For example, node management LIFs are set to the "local-only" failover policy because failover ports must be on the same local node. But cluster management LIFs can use any node in the cluster to perform management tasks, so it is created by default with the "broadcast-domain-wide" failover policy.

The following table describes how the failover policy setting affects the target ports that are selected from the failover group:

Failover policy Available failover target ports Details
broadcast-domain-wide All network ports from all nodes in the failover group. This is the default setting for the cluster management LIF.

You would not want to assign this policy to node management LIFs or cluster LIFs because in those cases the ports must be on the same node.

system-defined Only those ports in the failover group that are on the LIF's home node and on a non-SFO partner node. This is the default setting for data LIFs.

This setting enables you to keep two active data connections from two unique nodes when performing software updates. It allows for rolling upgrades; rebooting either odd-numbered or even-numbered nodes at the same time.

local-only Only those ports in the failover group that are on the LIF's home node. This is the default setting for cluster LIFs and node management LIFs.

This value cannot be changed for cluster LIFs.

sfo-partner-only Only those ports in the failover group that are on the LIF's home node and its SFO (storage failover) partner node.  
disabled No failover targets are included. The LIF is not configured for failover.