Maintaining and Managing the Storage Router
191
IP Storage Router SR2122-2 User Guide
Once a SCSI routing instance has been stopped, it can be re-activated by issuing
the
scsirouter enable
command. The
scsirouter enable
command
must be issued from the same storage router as the
no scsirouter enable
command.
See the
IP Storage Router 2122-2 Command Line Interface User Guide
for
command details.
Viewing Operational Statistics
Use the
show scsirouter stats
command to display the status of the
SCSI routing instance and to see the number of active connections and the number
of logins that have occurred since the storage router was last restarted (or since
statistics were last cleared).
For example, the
show scsirouter stats
command in
Example 22
shows
that SCSI routing instance,
foo
, is currently active.
Example 22: Results of “show scsirouter stats” Command
[SR2122-2_PR1]#
show scsirouter foo stats
router status
started
iSCSI ver (Min/Max)
logins active
foo
ACTIVE
Jan 11 23:06:08
2/2
10 7
Handling Failover
In a cluster, storage routers continually exchange information as heartbeats to
detect failures in the cluster. HA messages are sent using UDP over IP and,
depending on the message type or situation, may be sent as unicast or multicast
messages. To make sure that HA information is exchanged reliably between
storage routers, the storage routers alternate transmission of heartbeats between
the management and the HA interfaces.
Failover of SCSI routing instances is automatic when the storage router detects
that another storage router in the cluster is no longer responding to heartbeats.
Failover of a SCSI routing instance also occurs if the associated Gigabit Ethernet
interface is unavailable or if all targets are unavailable.
Содержание StorageWorks SR2122
Страница 110: ...Configuring System Parameters 110 IP Storage Router SR2122 2 User Guide ...
Страница 216: ...Cable and Port Pinouts 216 IP Storage Router SR2122 2 User Guide ...
Страница 224: ...Regulatory Compliance Notices 224 IP Storage Router SR2122 2 User Guide ...
Страница 232: ...Recommended Host Storage Configurations 232 IP Storage Router SR2122 2 User Guide ...
Страница 242: ...Index 242 IP Storage Router SR2122 2 User Guide ...