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
For additional information and recommended procedures for changing iSCSI driver configuration, see
the iSCSI driver readme and example configuration files. You can access the latest iSCSI drivers and
readme and example configuration files from Cisco.com.
Enabling and Disabling Connections
A SCSI routing instance becomes active, by default, once it is associated with a Gigabit Ethernet
interface to IP hosts. Each target that is added to an instance is also, by default, enabled. However, no IP
hosts can connect or log in to that target because the target has no access list associations. Once you
associate an access list with a target, it is automatically enabled; the IP hosts specified by access list
entries are allowed to connect or log in to the target.
Use the no scsirouter target enable command to control access to the target without changing the
access list associations or stopping the entire SCSI routing instance. Existing connections and logins are
not affected, but future connections and logins are prohibited. Use the scsirouter target enable
command when you are ready to allow connections and logins again.
For example, suppose you have a problem with an entry in the access list, webserver2. This access list
is associated with the target, webstorage2, which is, in turn, associated with the SCSI routing instance
foo.
Use the following procedure to temporarily disable access to the target associated with a problem access
list.
Command Description
Step 1
enable Enter Administrator mode.
Step 2
show scsirouter foo stats Display status to confirm the SCSI routing instance, foo, is active
on this storage router.
Step 3
show scsirouter foo Verify the name and current status of the target and access list. The
target, webstorage2, should be associated with the webserver2
access list and the target should be enabled. (Example 11-6.)
Step 4
no scsirouter foo
target webstorage2 enable
Disable access to the target, webstorage2. (Example 11-7.)