Emulex 375 - Manual (Page 34)

E MULEX M ODEL 375 SAN S TORAGE S WITCH
U SER ’ S G UIDE C HAPTER 3: S WITCH M ANAGEMENT
E MULEX C ORPORATION 31
P ART N UMBER 00041369-002 R EV . B
Default Smart Settings
There are several default Smart Settings available on the switch. These default Smart Settings were
defined by Fibre Channel storage experts to ensure that the switch is optimally configured for
performance and stability.
The default Smart Settings cannot be modified or deleted, but these settings can be used as templates
for creating custom Smart Settings.
Initiator or Target
This Smart Setting is the default setting for all switch ports from the factory. This setting offers no change
protection and all settings are set to their default values. Initiators and targets can be connected to ports
that are set to this Smart Setting.
This is the recommended Smart Setting for setups with targets and initiators connected to a single
switch.
Initiator with Stealth
This Smart Setting is used when connecting a host device to the port. When a port is set to this Smart
Setting, change notifications are not sent from the initiator to other devices, but change notifications are
received by the initiator.
This Smart Setting is appropriate for embedded storage controllers and external Host Bus Adaptors
(HBAs) or servers with installed HBAs.
Target with Stealth
This Smart Setting is used when connecting embedded storage devices, like JBODs, SBODs, tape
drives, or external RAID systems (JBODs, SBODs, or tape libraries). When a port is set to this Smart
Setting, change notifications are sent to other devices, but change notifications are not received by the
target.
Fabric Connection
This Smart Setting is used when connecting a port to a Fabric switch. Only one connection from the
Emulex Model 375 SAN Storage Switch to a Fabric switch is valid.
Tree Cascade
This Smart Setting is used when connecting two or more switches together in a tree configuration. Up to
four tree cascades are supported between switches. See
“Cascading Switches” on page 46 for
additional information.
String Cascade
This Smart Setting is used when connecting two or more switches together in a string configuration. Up
to four string cascades are supported between two switches. See
“Cascading Switches” on page 46 for
additional information.
Before selecting a cascade option, consider the following:
• Cascade ports of like number should be connected together. For example, connect port 1 of
Switch A to port 1 of Switch B, connect port 2 of Switch B to port 2 of Switch C, and so on.
• Cascade port numbers must be lower than non-cascade port numbers (for example, Initiator or
Target ports). Therefore, select cascade types before selecting these non-cascade types.
• A maximum of three switches may be connected using string cascades.
Note: Changing the Smart Setting of a port may affect the performance or behavior of the system.
Depending on the implementation, some Smart Settings are more appropriate than others.