HP Surestore 6164 QuickLoop User's Guide - Page 21

Loop Initialization Primitive., Arbitrated loop physical address. A one-byte value used to identify

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E_port Expansion port. A port is designated an E_Port when it is used as an interswitch expansion port to connect to the E_Port of another switch, to build a larger switch fabric, or to build a two-switch QuickLoop configuration. Sometimes, a single device is attached to a port. In this case the port functions as an F_port. The attached device possesses either an N_port (if the device is fabric-capable) or an NL_port, in which case the device is connected to the fabric in a loop configuration through an FL_Port on a switch. In this latter case a looplet is created. looplet A set of devices connected in a loop to a port that is itself a member of an arbitrated loop. By contrast, a single device rather than a loop might be connected to a port. Each device in a private loop must have a unique physical address. The devices in a QuickLoop are assigned a unique phantom AL_PA. AL_PA Arbitrated loop physical address. A one-byte value used to identify a device in an arbitrated loop. During the operation of switches in a QuickLoop, messages are transmitted by devices as they come online. These messages, called LIPs, are in addition to normal data traffic. It is desirable to keep "LIPing" to the minimum possible traffic volume. LIP Loop Initialization Primitive. Using QuickLoop 21

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Using QuickLoop
21
E_port
Expansion port. A port is designated an E_Port when it is used as an
interswitch expansion port to connect to the E_Port of another switch, to
build a larger switch fabric, or to build a two-switch QuickLoop
configuration.
Sometimes, a single device is attached to a port. In this case the port
functions as an F_port. The attached device possesses either an N_port (if
the device is fabric-capable) or an NL_port, in which case the device is
connected to the fabric in a loop configuration through an FL_Port on a
switch. In this latter case a looplet is created.
looplet
A set of devices connected in a loop to a port that is itself a member of
an arbitrated loop. By contrast, a single device rather than a loop might
be connected to a port.
Each device in a private loop must have a unique physical address. The
devices in a QuickLoop are assigned a unique phantom AL_PA.
AL_PA
Arbitrated loop physical address. A one-byte value used to identify a
device in an arbitrated loop.
During the operation of switches in a QuickLoop, messages are transmitted
by devices as they come online. These messages, called LIPs, are in
addition to normal data traffic. It is desirable to keep “LIPing” to the
minimum possible traffic volume.
LIP
Loop Initialization Primitive.