Before Persistent Ports is active, the output of the showhost command displays as follows:
#showhost
Id | Name | Persona | Port | |
1 | server1 | Generic | 5001438009AE770E | 0:1:1 |
|
|
| 5001438009AE770C | 0:1:1 |
|
|
| 5001438009AE770E | 1:1:1 |
|
|
| 5001438009AE770C | 1:1:1 |
When Persistent Ports is active, the output of the showhost command, under the Port column, shows both the physical port and the physical port where Persistent Ports is active. In the example below, port 0:1:1, logged in from each of the host HBA ports, appears twice, once for the physical port and once again for the persistent port that is active on the physical port.
#showhost
Id | Name | Persona | Port | |
1 | server1 | Generic | 5001438009AE770E | 0:1:1 |
|
|
| 5001438009AE770C | 0:1:1 |
|
|
| 5001438009AE770E | 0:1:1 |
|
|
| 5001438009AE770C | 0:1:1 |
After the controller node has been successfully rebooted, the FailoverState for the ports changes back to none, as shown in the following example:
After the node has been successfully rebooted, the node entry of node 0 reappears in the GUI and I/O is still in progress.
Manually, you can perform failover and failback using the controlport failover <N:S:P> and controlport failback <N:S:P> command options.
Persistent Ports Limitations
Persistent Ports Technical White Paper
To learn more about Persistent Ports, refer to the following White Paper:
Unsupported Configurations
The Persistent Ports feature is not supported with iSCSI and FCoE.
Setting Up and Zoning the Fabric 17
