Specifications

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Cisco SN 5428-2 Storage Router Software Configuration Guide
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Chapter 11 Maintaining and Managing the SN 5428-2 Storage Router
Controlling SCSI Routing Instances in a Cluster
Note Use caution if you change the configuration of a SCSI routing instance while it is running on the storage
router that is not the instance’s configured primary. If the instance’s configuration changes while the
designated primary for that instance is down (or otherwise removed from the cluster), the changes will
not be propagated to that node. When the primary reboots (or otherwise returns to the cluster), it will
reassert itself as the primary and will start to run the instance using the last configuration it had before
leaving the cluster.
Failover as Permanent Move
Referring to the example cluster scenario previously described, the following procedure moves the SCSI
routing instance, scsi2, from its primary, or preferred, storage router, Sys1, to the other storage router on
a permanent basis. The commands in this procedure are issued from a CLI session from Sys1.
Once the failover is complete, establish a management session to Sys2 and verify—using the
show scsirouter scsi2 command—that the SCSI routing instance, scsi2, is now running on Sys2 and that
Sys2 is designated as the primary for that instance.
Failover for Distribution Purposes
In the example cluster scenario previously described, there is a significant increase in traffic for SCSI
routing instance, scsi4, and as a result, you decide to distribute all of the other instances (scsi1, scsi2,
and scsi3) to Sys1. Sys1 is already running scsi1 and scsi2.
The following procedure moves the SCSI routing instance, scsi3, to Sys1. The commands in this
procedure are issued from a CLI session from Sys2.
Command Description
Step 1
enable Enter Administrator mode.
Step 2
show cluster
or
show scsirouter scsi2 brief
Verify that the instance to be moved, scsi2, is indeed running on
Sys1.
Step 3
scsirouter scsi2 primary Sys2 Set Sys2 as the primary for the desired SCSI routing instance,
scsi2.
Step 4
save scsirouter scsi2 bootconfig Save the current SCSI routing instance configuration, including
the primary setting, and circulate the changed configuration
around the cluster.
Step 5
failover scsirouter scsi2 (Optional) Manually failover the desired SCSI routing instance,
scsi2.
Note Because the storage routers are both enabled for failover
by eligibility and have access to the same resources for the
SCSI routing instances, scsi2 will automatically failover to
Sys2 because it is now configured as the primary for that
instance.