IBM TotalStorage DS300, Best Practices Manual, Page: 59 / 680

Chapter 3. Components overview
41
3.3.5 DS300 failover
The DS300 failover mechanism is IP failover. IP failover is not a true path failover
mechanism. It only allows you to have controller redundancy. However, this
failover method is independent of the iSCSI initiator used, so it can support both
software based and hardware based initiators (refer to 3.7, “iSCSI software and
hardware” on page 58).
ETH3 Link Green GbE Link Status LED is off.
When this LED is lit, it indicates that the Gb
Ethernet link is operational.
If this LED is off, perform the following
actions:
򐂰
Check the status on the Ethernet
switch.
򐂰
Replace the Ethernet cable.
򐂰 Switch the Ethernet cable to another
port on the same switch in the same
network segment.
ETH3 TX/RX Green GbE Activity LED is off.
This LED will flicker continuously between
on and off. When this LED is lit, it indicates
that data packets are being transmitted or
received.
If this LED is off, then no data is being sent
or received. Establish a connection and
start passing data.
ETH2 Link Green GbE Link Status LED is off.
When this LED is lit, it indicates that the Gb
Ethernet link is operational.
If this LED is off, perform the following
actions:
򐂰
Check the status on the Ethernet
switch.
򐂰
Replace the Ethernet cable.
Switch the Ethernet cable to another port
on the same switch in the same network
segment
ETH2 TX/RX Green GbE Activity LED is off.
This LED will flicker continuously between
on and off. When this LED is lit, it indicates
that data packets are being transmitted or
received.
If this LED is off, then no data is being sent
or received. Establish a connection and
start passing data
LED symbol Controller problem indicator Action
Important: The description of failover on the DS300 subsystem was accurate
at the time this book was written. However, failover processing and options
may change in future releases.