HP MPX200 Multifunction Router - Manual (Page 200)

iSR6200 Router Manager
User’s Guide
Glossary-6 ISR654602-00 H
N_Port
Node port. Connects by a point-to-point
link to either a single N_Port or a single
F_Port . N_Ports handle creation, detec-
tion, and flow of message units to and from
the connected systems. N_Ports are end
ports in virtual point-to-point links through
a fabric, for example N_Port to F_Port to
F_Port to N_Port using a single Fibre
Channel fabric switch. See also
FL_Port .
NL_Port
Node loop port. A port capable of
arbitrated loop functions and protocols. An
NL_Port connects through an arbitrated
loop to other NL_Port and at most a single
FL_Port. NL_Ports handle creation, detec-
tion, and flow of message units to and from
the connected systems. NL_Ports are end
ports in virtual point-to-point links through
a fabric, such as NL_Port to F_Port to
F_Port to N_Port using a single Fibre
Channel fabric switch. In the absence of a
fabric switch FL_Port, NL_Ports can
communicate with other NL_Ports in
virtual point-to-point links through an
FC_AL open loop circuit often through
FC_AL (arbitrated loop) hub or loop switch
devices. See:
E_Port , F_Port , FL_Port ,
G_Port , N_Port .
network time protocol
See NTP .
non-volatile random access memory
See NVRAM .
NTP
Network time protocol. NTP is used for
distributing the Coordinated Universal
Time (UTC) by means of synchronizing the
clocks of computer systems over
packet-switched, variable-latency data
networks.
NVRAM
Non-volatile random access memory.
NVRAM is a type of memory that retains
data (including configuration settings)
even when power is removed. You can
configure NVRAM settings manually or
restore them from a file.
path
A path to a device is a combination of a
adapter
port instance and a target port as
distinct from internal paths in the fabric
network. A fabric network appears to the
operating system as an opaque network
between the adapter (initiator) and the
target.
Because a path is a combination of an
adapter and a target port, it is distinct from
another path if it is accessed through a
different adapter or it is accessing a
different target port. Consequently, when
switching from one path to another, the
driver might select a different adapter (initi-
ator), a different target port, or both.
This selection is important to the driver
when selecting the proper method of
failover notification. It can make a differ-
ence to the target device, which might
have to take different actions when
receiving retries of the request from
another initiator or on a different port.
PCM
Power and cooling module. A device that
consists of one power supply and three
fans.
point-to-point
Also FC-P2P. Two Fibre Channel nodes
directly connected (not in a loop).