Checking Cluster Link Status (CLI)

Use this procedure to determine whether the cluster links are connected and active.

Before you perform initial cluster setup (see Upgrading a Standalone Appliance to a Clustered Configuration (BUI)), ensure that all cluster links are connected and active. A broken connection can mean that the other cluster node is restarting/rebooting, or it can mean that the link is not cabled correctly or the cluster cables are not secure in their connectors. For cluster cabling instructions, see Connecting Cluster Cables in Oracle ZFS Storage Appliance Cabling Guide, Release OS8.8.x.

Go to configuration cluster.
Enter the links command.
In the following examples, all links are connected and active (AKCIOS_ACTIVE state). A link that is not up will show a different state, such as AKCIOS_TIMEDOUT.

The following example shows cluster connections between two Oracle ZFS Storage ZS9-2 controllers.
```
hostname:configuration cluster> links
 
    lio_dev/i40e0 = AKCIOS_ACTIVE
    lio_dev/i40e1 = AKCIOS_ACTIVE
```
The following example shows cluster connections between two Oracle ZFS Storage ZS7-2 or ZS5-2 controllers.
```
hostname:configuration cluster> links

    clustron3_ng3:0/clustron_uart:0 = AKCIOS_ACTIVE
    clustron3_ng3:0/clustron_uart:1 = AKCIOS_ACTIVE
    clustron3_ng3:0/dlpi:0 = AKCIOS_ACTIVE
```
Other controllers show similar links output. The only difference is in the portion that precedes /clustron or /dlpi. For example, clustron3_ng3:0 in the preceding example is clustron3:0 for Oracle ZFS Storage ZS5-4 controllers, clustron2:0 for Oracle ZFS Storage ZS4-4 controllers, and clustron2_embedded:0 for Oracle ZFS Storage ZS3-2 controllers.