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SN0051103-00 A Glossary-5
iSR6250 Intelligent Storage Router
Installation Guide
A
management workstation
PC workstation used to manage routers
remotely by connecting to the routers
using the SANsurfer Router Manager or
CLI commands.
MD5
Message-digest algorithm 5. MD5 is a
widely used, partially insecure crypto-
graphic hash function with a 128-bit hash
value. An MD5 hash is typically expressed
as a 32 digit hexadecimal number.
media
Physical-layer information carriers. FC
supports several different physical media:
copper, multimode optical, and
single-mode optical. All FC protocols are
supported on all media.
MIB
Management information base. A set of
guidelines and definitions for SNMP
functions.
mid-plane
Located inside the iSR6250 chassis
between the blades and their corre-
sponding PCMs, the mid-plane connects
the removable power supply and the
iSR6250 blades.
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 FC fabric
switch. See also FL_Port.
NIC
Network interface card. Computer card
installed to enable a dedicated network
connection.
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, for example NL_Port to F_Port to
F_Port to N_Port using a single FC 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.
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.